Bolthole Index

Sussex County, Delaware

Building permits, zoning and septic rules in Sussex County, Delaware

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Unincorporated Sussex County, Delaware requires a county building permit before home construction begins1. County zoning governs land use and setbacks, while Delaware DNREC handles septic permits23. A tiny house can qualify as a dwelling, but it needs a permanent foundation, water, sewage, heat and other residential features4.

At a glance

Building permit
Required for new construction in unincorporated Sussex County1
Zoning
County zoning districts govern unincorporated land2
Septic permit
State-run through Delaware DNREC, not the county3
Well permit
Issued by DNREC for wells of 50,000 gallons/day or less5
RV living
An RV used for habitation without a fixed foundation and permanent utilities can be treated as campground use6
Tiny home
Can qualify as a dwelling with county foundation, utility and safety requirements4
Owner-builder exemption
Owners may obtain a permit to perform work on their own building7
Minimum home size
Tiny-house, manufactured-home and occupancy-based housing standards differ8910

Who to call

Building permits

Sussex County Building Code Office

Building permits, plan review and inspections under Chapter 52 of the Sussex County Code for unincorporated areas and 14 incorporated towns

(302) 855-7860

Building Code Office, 2 The Circle, P.O. Box 589, Georgetown, DE 19947

Zoning

Sussex County Planning & Zoning Office

Zoning administration, land-use applications and setback/structure-location information for unincorporated Sussex County

(302) 855-7878

2 The Circle, P.O. Box 417, Georgetown, DE 19947

Septic permits

DNREC-Ground Water Discharges Section

State on-site wastewater (septic) system permits for Sussex County; the county requires proof of the DNREC permit before it issues a certificate of occupancy

(302) 856-4561

Floodplain permits

Sussex County Government (general line)

General Sussex County government contact; the county's flood map ordinance designates the County Environmental Manager, or a person named by the County Administrator, as Floodplain Administrator, and does not publish that role's direct line

(302) 855-7700

2 The Circle (PO Box 589), Georgetown, DE 19947

Contact details are copied from each office’s official page and were checked against it on October 10, 2026.

Off-grid gear

Going off-grid in Sussex County means bringing your own water and power. The kit we’d start with:

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Do you need a building permit in Sussex County, Delaware?

Sussex County requires a building permit before construction begins in unincorporated areas; building construction with a fair value below $300 is exempt1. File a written application on the Department of Finance’s prescribed forms and obtain the building permit before starting work11. Owners doing their own building work may obtain a permit, but owner-builder eligibility does not waive the building permit7. The county’s fiscal-year-2023 schedule listed $7.50 for the first $1,000 of construction estimate and $3 for each $1,000 thereafter for unincorporated property; ask the Building Code Office for current charges1213. Single-family projects require staged inspections with county-approved plans on site, followed by a certificate of occupancy before moving in1415.

Who is the Sussex County building department, and how do you reach them?

The Sussex County Building Code Office enforces building codes in unincorporated Sussex County and 14 incorporated towns; call (302) 855-7860 or visit Building Code Office, 2 The Circle, P.O. Box 589, Georgetown, DE 1994713. Sussex County Planning & Zoning administers unincorporated land use and provides setbacks and structure locations for building permits; call (302) 855-7878 or visit 2 The Circle, P.O. Box 417, Georgetown, DE 1994716. Inside Milford, the city handles its own building permits; on-site septic systems remain under Delaware DNREC1718.

Does Sussex County have zoning?

Sussex County’s official zoning map establishes district boundaries, and the county’s land-use rules below apply to unincorporated land1916. Milford administers its own zoning; DNREC still oversees on-site septic systems inside the city2018. AR-1 and AR-2 central-sewer cluster development has minimum yards of 25 feet front and 10 feet side and rear; other development generally uses 40-foot front, 15-foot side and 20-foot rear yards, subject to footnotes, reductions and additional buffers21. An AR-1 garage variance case also identifies a required 40-foot front yard, but does not establish setbacks for every structure or district22. A new manufactured home on an AR-1 or AR-2 lot with no prior manufactured home must be multi-sectional, no more than 5 years old and on at least 0.75 acre23. Major subdivisions require a staff meeting, preliminary plan and supporting documents before public-hearing review24.

How do septic permits work in Sussex County?

Delaware DNREC, not Sussex County, oversees septic siting, design, permits and installation3. Start with a site evaluation by a Class D soil scientist; a Class B designer handles a gravity-system permit, while a Class C designer handles an engineered or pressure-dosed system25. Soil-survey data rate 0% of Sussex County soils as free from severe limits for a conventional drain field, so make the site evaluation an early purchase contingency26. At a property transfer, an on-site wastewater system generally must be pumped by a Class F licensee and inspected by a Class H licensee before closing, with limited timing and recent-inspection exceptions27. A permanent holding tank is not a simple off-grid substitute: it is generally prohibited, cannot serve an unimproved lot and requires a DNREC permit under narrow conditions28.

Can you live in an RV or tiny home on your land in Sussex County?

A tiny house in Sussex County can qualify as a dwelling when it meets county requirements: no more than 400 square feet excluding lofts, a permanent foundation, potable water, permanent sewage disposal, water heating and heat capable of maintaining 68°F4. The county tiny-house handout’s 70-square-foot habitable-space minimum does not replace other housing requirements810. For existing residential structures covered by Delaware’s State Housing Code, subject to statutory exemptions, habitable rooms must provide at least 150 square feet for the first occupant and 100 square feet per additional occupant10. Sussex County has treated habitation in an RV without a fixed foundation and permanent utilities as campground use, even for a single camper6. Campground access, spacing and buffer requirements also apply to temporary camping; ask Planning & Zoning before relying on an RV as housing during construction2916.

Building a home in Sussex County: the steps, in order

  1. Confirm the parcel’s district, setbacks and dwelling type with Sussex County Planning & Zoning16.
  2. Obtain a Class D soil evaluation and have the appropriate licensed designer secure the DNREC septic permit25.
  3. Have a licensed water-well contractor apply to DNREC if the property needs a well5.
  4. Apply online for a DelDOT entrance permit for new or modified state-road access; the South District reviews residential applications requiring a plan showing the house, driveway, property lines and tax parcel number, plus proof of ownership3031.
  5. Submit the county’s prescribed written building permit application and obtain the building permit before construction11.
  6. Obtain a county floodplain development permit before grading, filling, utility installation or construction wholly or partly within, or touching, a special flood hazard area; submit site plans, elevations and an Elevation Certificate32.
  7. Complete inspections and obtain the certificate of occupancy; applicable completion documents include the DNREC septic report, DelDOT entrance permit and final flood-zone elevation certificate1415.

What to check before you buy land in Sussex County

Verify the parcel's district on the official county zoning map and ask Planning & Zoning for the applicable use and setback rules216. Make septic feasibility a contract contingency because soil-survey data rate 0% of Sussex County soils as free from severe conventional-drain-field limits26. Ask whether the parcel lies in a county sanitary or water district, where an eligible building abutting an available main may be ordered to connect33. Check the flood map before choosing a building site because development wholly or partly within, or touching, a special flood hazard area needs a Sussex County floodplain development permit34. DelDOT generally allows one access point for an individual residence on a state-maintained local or collector road; a second access requires adequate spacing or special circumstances35. The effective property tax rate is about 0.3%, and the median annual bill is $1,1713637.

Watch-outs

  • AR-1 and AR-2 setbacks differ between central-sewer cluster development and other development, and additional buffers or special-lot rules may apply; confirm the parcel-specific numbers with Planning & Zoning2116.
  • Owner-builder eligibility does not erase trade-specific rules: qualifying owners may do their own building work, while owner-performed electrical work uses a separate state permit with narrower conditions738.
  • A manufactured home in unincorporated Sussex County needs at least 450 square feet in the original unit, excluding additions; that standard differs from tiny-house habitable-space requirements and Delaware’s occupant-based housing standards9810.
  • A county agenda treated a proposal for 2 seasonal short-term-rental bungalows on a 0.8-acre AR-1 parcel as a conditional use, but that parcel-specific case does not establish a countywide short-term-rental rule; ask Planning & Zoning before buying for rental use3916.

Sources

  1. Delaware Code, Title 9, Chapter 63 — Sussex County Building Permits, quoted and re-checked
  2. Ordinance No. 2488: Official Zoning Map, quoted and re-checked
  3. dnrec.delaware.gov, quoted and re-checked
  4. Tiny Home Requirements, quoted and re-checked
  5. Well Permits, quoted and re-checked
  6. Planning & Zoning Commission Minutes, March 24, 2022, quoted and re-checked
  7. Title 9, Chapter 63, Sussex County Building Permits, quoted and re-checked
  8. Tiny Home Requirements, quoted and re-checked
  9. Ordinance No. 2682, quoted and re-checked
  10. Delaware State Housing Code, minimum conditions of premises and buildings, quoted and re-checked
  11. Title 9, Chapter 63, Sussex County Building Permits, quoted and re-checked
  12. Sussex County Annual Budget and Fee Schedule Ordinance, quoted and re-checked
  13. Sussex County Building Code Office (sussexcountyde.gov)
  14. Single Family Inspection Requirements, quoted and re-checked
  15. Final Completion Requirements To Obtain Certificate of Compliance/Occupancy, quoted and re-checked
  16. Sussex County Planning & Zoning Office (sussexcountyde.gov)
  17. Milford: Milford FAQs (Sussex County), quoted and re-checked
  18. Milford: official source (Sussex County), quoted and re-checked
  19. Ordinance No. 2488: Official Zoning Map, quoted and re-checked
  20. Milford: Planning & Zoning (Sussex County), quoted and re-checked
  21. Ordinance No. 1709: To allow cluster development of residential structures and to define cluster development, quoted and re-checked
  22. Board of Adjustment Minutes — May 6, 2019, quoted and re-checked
  23. Planning and Zoning Reference Guide Brochure, quoted and re-checked
  24. Subdivision Application Process - April 2025, quoted and re-checked
  25. Septic Systems, quoted and re-checked
  26. Share of soils USDA rates "not limited" for a conventional septic drain field (SSURGO). A strict rating: the median county is about 6% and a tenth of counties are 0%, so a low figure means most lots need a site evaluation or an engineered system, not that septic is impossible. Cite it only with that caveat: Bolthole Index county data
  27. 7101 Regulations Governing the Design, Installation and Operation of On-Site Wastewater Treatment and Disposal Systems, quoted and re-checked
  28. Delaware Final On Site Regulations - With Exhibits, quoted and re-checked
  29. Planning & Zoning Commission Minutes, March 24, 2022, quoted and re-checked
  30. Entrance Permit System - Frequently Asked Questions, quoted and re-checked
  31. DelDOT Residential Access Regulations, quoted and re-checked
  32. Sussex County Ordinance No. 2384, Flood Map Ordinance, quoted and re-checked
  33. Title 9, Chapter 65, Sanitary and Water Districts, quoted and re-checked
  34. Ordinance No. 2384 — Floodplain Management Regulations, quoted and re-checked
  35. DelDOT Development Coordination Manual — Chapter 7 Residential Access, quoted and re-checked
  36. Effective property tax rate: Bolthole Index county data
  37. Median property tax bill: Bolthole Index county data
  38. Homeowner Permit, quoted and re-checked
  39. Sussex County Planning & Zoning Commission Agenda, February 4, 2026, quoted and re-checked

Written October 10, 2026 from the rules quoted below, each taken from an official source and re-checked by an independent reviewer. This is research, not legal advice: rules change, so confirm with the office before you buy or build.

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Compared with neighboring counties

RuleSussex CountyKent CountyNew Castle County
Building permitRequiredRequiredRequired
County zoningYesYesYes
Septic permitsDE DNRECDE DNRECDE DNREC

County locator

Sussex County in Delaware

58
County map
Sussex County highlighted among the Delaware counties · colored by Index score

How Sussex County scores

Seclusion32100% ev.
Self-Sufficiency74100% ev.
Admin Boringness4090% ev.
Durability65100% ev.
Property Autonomy53100% ev.
Carry Cost58100% ev.

Evidence strength: 98%. This reports direct-source completeness and fallback use; it is separate from the score and is not a confidence interval. How it works →

$491kTypical home
0.3%Property tax
$9,642Land / acre
46.2"Annual rain
4% of yrsSevere drought
3.1 / yr (+2.9)Mid-century 100°F days
12.6 daysMid-century dry spell
2.22" (+2.6%)Mid-century 1-day rain
1.34×Wildfire change factor
100%Forward climate coverage
$1,134Home insurance / yr
1.4% / yrInsurance growth
0.71%Nonrenewal rate
county median (2+ published ZIPs)Insurance basis
220,258People within 30 min
2,216,992People within 2 hr
133,849Radius comparison (15 mi)
281.5People / sq mi
3.8%Federal land
100%Land at 15% slope or less
0%Soils rated "not limited" for septic (strict USDA rating)
0 acWorkable land screen
44.7%Wooded land
65.6 tonsBiomass / forest ac
56.8°FAvg temp

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Cities and towns in Sussex County

Inside a city or town, that city usually issues building permits and sets zoning; the county’s rules above cover unincorporated land. Septic, wells and floodplain rules usually stay with the county or state everywhere.

Not yet researched: Town of Bethel · Town of Blades · Town of Delmar · Town of Ellendale · Town of Greenwood · Town of Laurel · Town of Milton · Seaford · Town of Slaughter Beach

Answers from the rulebook for Sussex County

What the ordinances and state agencies actually say — one answer per question, each quoted from the official source and independently re-checked.

Sussex County rules

  • Building permitRequired

    Construction or commencement of construction of a building in Sussex County, including construction in unincorporated areas; incorporated municipalities may issue their own permits and must report them under the county statute.

    • A written application must be filed with the Department of Finance before construction begins and a permit must be obtained.
    • Permits are issued only to contractors, the owner of a building necessary to the operation of farm lands, the owner of property located in an incorporated city or town in Sussex County, or an owner doing the owner’s own work or labor about the owner’s own building.
    • No permit may be issued for construction or an improvement or structure within land designated for a future highway right-of-way unless the Department of Transportation authorizes temporary use or the statutory notice, declaration, and condemnation-proceeding conditions are satisfied.
    • A permit is required for construction, erection, placement, or alteration of specified objects or structures meeting the statutory airport-height, airport-distance, or obstruction criteria; approval by the Department through the Office of Aeronautics is required before issuance for those objects or structures.
    • A permit may not be issued to a nonresident contractor until the Department of Finance is satisfied that 30 Del. C. § 2502(b) has been complied with to the extent applicable.
    • No permit is required when the fair value of the construction of a building is less than $300.
    • Permit fees are determined by the Sussex County Council; the county may add a surcharge of up to 1.25% of construction value for qualifying school-capital funding, but no such surcharge may be added to an application with a construction value of $30,000 or less if submitted after issuance of the original certificate of occupancy.
    • A building constructed without a permit may not be occupied, maintained, or used except with permission of the Department of Finance.

    permit-exemption construction value: < 300 USD (No person shall be required to obtain a permit when the fair value of the construction is less than $300.) · maximum school-capital surcharge: <= 1.25 percent of construction value (No surcharge may be added for construction value of $30,000 or less when the application is submitted after issuance of the original certificate of occupancy.)

    “No person shall construct or commence the construction of a building without first filing with the Department of Finance an application in writing for such construction and obtaining a permit therefor.”
  • Owner-builder exemptionConditional

    An owner of property in Sussex County who desires to perform the owner's own work or labor about the owner's own building.

    • A construction permit is generally required before construction begins.
    • Permits may be issued to an owner desiring to do the owner's own work or labor about the owner's own building.
    • No person is required to obtain a permit when the fair value of the construction of a building is less than $300.
    • The statute also lists contractors, the owner of a building necessary to the operation of farm lands, and the owner of property located in an incorporated city or town in Sussex County as eligible permit recipients.
    • Applications must be filed in writing with the Department of Finance on prescribed forms and contain information prescribed by the Department of Finance.

    permit-exemption construction value threshold: < 300 USD (No person shall be required to obtain a permit when the fair value of construction is less than $300.)

    “Permits shall be issued only to contractors, [...] or any owner of property desiring to do his or her own work or labor about his or her own building.”
  • InspectionsRequired

    Single-family dwelling construction subject to Sussex County inspection procedures.

    • The county lists footing, foundation setback, pre-slab, track, housewrap/framing, energy, and final inspections, with project-specific exceptions.
    • Plant-built portions of modular homes do not require framing inspection but require a close-in inspection; site-built portions of modular projects still require framing inspection.
    • County-approved plans must be kept on site for inspectors’ review.
    • Additional inspections after five inspections are charged $40 per trip, except modular home projects without site-built additions; modular projects are charged after four inspections.
    • Third-party reports must be provided before scheduling; requested inspections lacking required reports will not be scheduled.
    • Inspections must be requested 24 hours in advance and require the application number.

    additional inspection fee: per 40 USD per trip (After 5 inspections, except modular home projects without site-built additions; modular home projects after 4 inspections)

    “7. FINAL INSPECTION- • Work is completed • Electrical and plumbing have been inspected with stickers on site.”
  • Certificate of occupancyRequired

    Projects requiring a Sussex County certificate of compliance/occupancy before occupancy or intended use.

    • When applicable, an on-site wastewater/septic completion report with DNREC red stamp must be submitted.
    • A DelDOT entrance permit must be submitted when required on new construction and commercial projects.
    • A final elevation certificate must be submitted when in a flood zone.
    • The certificate is issued only after the listed documents are received and Sussex County field inspections are completed.
    • The certificate must be issued prior to any occupancy or intended use to complete the application.
    • The source is marked “Revised 4/28/2020”; this is a revision date, not an effective date.
    “My signature certifies I understand this certificate must be issued prior to any occupancy or intended use to complete the application.”
  • County-wide zoningPresent (with conditions)

    Sussex County zoning districts established by the county zoning map.

    • The official zoning map is maintained by the office of the County Planning and Zoning Commission.
    • Copies are provided by the Sussex County Office of Mapping and Addressing upon request for a reasonable fee.
    • The ordinance states that it became effective upon adoption by a majority of the elected members of Sussex County Council; the ordinance was certified as adopted on March 28, 2017.
    “The boundaries of the districts are hereby established as shown on the Zoning Map”
  • Zoning districtsPublished (with conditions)

    Official zoning districts and zoning-map designations in the unincorporated areas of Sussex County, Delaware.

    • The county zoning map establishes district boundaries and is maintained by the Sussex County Planning and Zoning Commission.
    • The Official Zoning Map is available for inspection through the Sussex County government website and from the Planning and Zoning Commission.
    • Copies of the Official Zoning Map may be provided by the Sussex County Office of Mapping and Addressing upon request for a reasonable fee.
    • Incorporated municipalities may have separate municipal land-use controls; this claim is limited to the unincorporated county area.
    • District-specific permitted uses and development densities depend on the applicable zoning district.
    “Copies of the Official Zoning Map shall be provided by the Sussex County Office of Mapping and Addressing upon request for a reasonable fee. The Official Zoning Map shall also be available for inspection at the office of the Planning and Zoning Commission and through the Sussex County government website.”
  • Minimum dwelling sizeSpecified

    Habitable dwelling units sized as a tiny house in unincorporated Sussex County.

    • The county handout identifies the requirements as applying to habitable dwelling units sized as a tiny house and references the Sussex County Code, 2021 IRC, and 2018 IECC.
    • The minimum 70-square-foot figure is habitable space, not necessarily total floor area.
    • The handout states that lofts are excluded from the 400-square-foot tiny-house size description but imposes separate loft requirements.
    • Minimum ceiling heights are 6 feet 8 inches in habitable spaces and hallways and 6 feet 4 inches in bathrooms, toilet rooms, and kitchens; loft ceiling heights may be less than 6 feet 8 inches.
    • Emergency rescue openings and one compliant egress door per dwelling unit are required.

    maximum tiny-house area excluding lofts: <= 400 sq ft (Lofts excluded) · minimum habitable space: >= 70 sq ft · minimum ceiling height in habitable spaces and hallways: >= 6 ft 8 in (Loft ceiling heights may be less than 6 ft 8 in) · minimum ceiling height in bathrooms, toilet rooms, and kitchens: >= 6 ft 4 in · minimum loft area: >= 35 sq ft · minimum loft horizontal dimension: >= 5 ft · minimum loft ceiling height: >= 3 ft · minimum egress door clear width: >= 32 inches · minimum egress door clear height: >= 78 inches

    “10. Minimum square footage not less than 70 sq. ft. of habitable space”
    One more reviewed finding on this topic
    • Specified — Manufactured homes used as dwellings in unincorporated Sussex County.
      “It shall have a gross floor area, excluding any additions not a part of the original manufactured unit, not less than 450 square feet.”
  • SetbacksDistrict specific (with conditions)

    AR-1 and AR-2 agricultural residential zoning districts, including cluster and non-cluster development.

    • For AR-1 and AR-2 cluster development with central sewer, the stated minimum yards are 25 feet front, 10 feet side, and 10 feet rear.
    • For all other AR-1 and AR-2 development, the stated minimum yards are 40 feet front, 15 feet side, and 20 feet rear; the source footnote states 40(30) for the front yard.
    • A legally recorded pre-January 1, 1971 lot under 20,000 square feet or under 100 feet wide is subject to MR District minimum side-yard requirements.
    • Later amendments allow certain front-yard reductions based on neighboring building setbacks, but not below five feet, and exclude cluster subdivisions and residential planned communities.
    • Additional buffers and setbacks may apply under other Chapter 115 provisions.

    AR-1/AR-2 cluster central-sewer front yard: 25 feet · AR-1/AR-2 cluster central-sewer side yard: 10 feet · AR-1/AR-2 cluster central-sewer rear yard: 10 feet · AR-1/AR-2 other front yard: 40 (30) feet (See the source table and footnote.) · AR-1/AR-2 other side yard: 15 feet · AR-1/AR-2 other rear yard: 20 feet

    “No front yard setback reduced pursuant to this subsection shall be reduced to less than five feet.”
    One more reviewed finding on this topic
    • Specified — Front-yard setback requirement identified for an existing structure in Sussex County's AR-1 zoning district.
      “The Applicant is requesting a variance of 7.2 ft. from the required 40 ft. front yard setback for an existing garage.”
  • Living in an RVLimited

    Use of an RV camper for habitation or a tourist-home use in Sussex County, including unincorporated county areas governed by the Sussex County Zoning Code.

    • An RV camper cannot be considered a dwelling under the applicable County Codes when it is not on a fixed foundation, lacks permanent utility connections, and has water and wastewater arrangements of the type described in the source.
    • The use is treated as a campground use even when there is only one camper or campsite.
    • All campsites within Sussex County must comply with Sussex County Zoning Code § 115-172H.
    • Section 115-172H regulates mobile campers, tents, camp trailers, touring vans and similar uses.
    • Campsite access must be through an easement at least 50 feet wide.
    • Interior drive easements must have paving 24 feet wide within a 30-foot right of way.
    • Each campsite must be at least 400 feet from an existing dwelling on property of other ownership.
    • Each campsite must have at least 2,000 square feet and a width of at least 40 feet.
    • Each campsite must have a landscaped space at least 50 feet wide along all boundaries, free of buildings and streets.

    campsite access easement width: >= 50 feet · interior drive paving width: 24 feet (within a 30-foot right of way) · separation from dwelling on property of other ownership: >= 400 feet · campsite area: >= 2000 square feet · campsite width: >= 40 feet · landscaped boundary space: >= 50 feet (free of buildings and streets)

    “This use is essentially a one-camper campground.”
  • Camping on your landLimited

    Temporary camping and campsites in Sussex County under the Sussex County Zoning Code.

    • The County applies campground requirements whether the request is for one or 100 campsites.
    • All campsites within Sussex County must comply with Sussex County Zoning Code § 115-172H.
    • Section 115-172H regulates mobile campers, tents, camp trailers, touring vans and similar uses.
    • Campsite access must be through an easement at least 50 feet wide.
    • Interior drive easements must have paving 24 feet wide within a 30-foot right of way.
    • Each campsite must be at least 400 feet from an existing dwelling on property of other ownership.
    • Each campsite must have at least 2,000 square feet and a width of at least 40 feet.
    • Each campsite must have a landscaped space at least 50 feet wide along all boundaries, free of buildings and streets.

    campsite access easement width: >= 50 feet · interior drive paving width: 24 feet (within a 30-foot right of way) · separation from dwelling on property of other ownership: >= 400 feet · campsite area: >= 2000 square feet · campsite width: >= 40 feet · landscaped boundary space: >= 50 feet (free of buildings and streets)

    “All campsites within Sussex County must comply with these requirements.”
  • Tiny homesLimited

    Habitable dwelling units sized as a tiny house under the Sussex County Code.

    • The unit must be 400 square feet or less, excluding lofts.
    • The unit must be anchored to a permanent foundation, either a turn-down slab monolithic pour or a crawlspace with footings 24 inches below grade.
    • Insulation must comply with 2018 IECC prescriptive requirements or provide a Res-Check compliance worksheet designed to the 2018 IEEC.
    • A permanent potable water source, permanent sewage disposal, permanent water-heating facility, and permanent heat source capable of maintaining a winter indoor design temperature of 68°F are required.
    • Manual J & S from an HVAC contractor is required at submittal.
    • Cooking facilities must include food preparation and storage.
    • Minimum sanitation fixtures are one kitchen sink, one separate lavatory, one water closet, and one shower or tub.
    • Smoke and carbon-monoxide detection are required under Sections R314 and R315.
    • Habitable space must be at least 70 square feet.
    • Minimum ceiling heights are 6 feet 8 inches in habitable spaces and hallways and 6 feet 4 inches in bathrooms, toilet rooms, and kitchens; loft ceiling heights may be less than 6 feet 8 inches.
    • Required clearances include 30 inches in front of each cooking surface, kitchen sink, and refrigeration appliance; 21 inches in front of a water closet, lavatory, and tub; and 24 inches in front of a shower stall, with the shower stall at least 30 inches by 30 inches.
    • Water closets must be spaced at least 15 inches on center from adjacent side walls, cabinets, or fixtures.
    • Loft spaces must be at least 35 square feet, at least 5 feet in every horizontal dimension, and have at least 3 feet of ceiling height; loft access, handrails, and guards must comply with Sections AQ104.2.1 through AQ104.2.5.
    • Emergency rescue openings are required under Section R310 and Appendix Q, Section AQ105.
    • Each dwelling unit must have at least one egress door; the door must be side-hinged and provide a clear opening at least 32 inches wide and 78 inches high under Section R311.

    maximum unit area excluding lofts: <= 400 sq. ft. · minimum habitable space: >= 70 sq. ft. · minimum foundation footing depth: >= 24 inches below grade · minimum winter indoor design temperature: >= 68 °F · minimum loft area: >= 35 sq. ft. · minimum loft horizontal dimension: >= 5 ft. · minimum loft ceiling height: >= 3 ft. · minimum egress door clear width: >= 32 inches · minimum egress door clear height: >= 78 inches

    “The following items are some of the requirements for habitable dwelling units sized as a tiny house per the Sussex County Code”
  • Manufactured homesLimited

    Manufactured-home occupancy in Sussex County AR-1 and AR-2 zoning districts and manufactured-home parks, subject to the County Planning and Zoning Reference Guide conditions.

    • For a lot with no previous manufactured home in an AR-1 or AR-2 zoning district, the home must be multi-sectional (double wide), no more than five years old, and the lot must be at least three-quarters of an acre.
    • For a lot with an existing manufactured home, replacement is allowed single-wide to single-wide, single-wide to double-wide, and double-wide to double-wide; double-wide to single-wide is not allowed.
    • A replacement home must be newer than the existing home.
    • The minimum manufactured-home size is 450 square feet.
    • In a manufactured-home park, the minimum home size is 450 square feet, the separation distance between other dwellings and accessory structures is 20 feet, maximum lot coverage is 35%, and setbacks are 10 feet in a newer park or 5 feet in an older park.
    • A variance or special-use exception may be sought through the Board of Adjustment.
    • Manufactured housing, including replacement, requires a permit.

    minimum lot size for new manufactured home in AR-1 or AR-2: >= 0.75 acre · maximum age of new manufactured home on lot with no previous manufactured home: <= 5 years · minimum manufactured-home size: >= 450 square feet · manufactured-home park separation distance: >= 20 feet (between other dwellings and accessory structures) · manufactured-home park maximum lot coverage: <= 35 percent · newer manufactured-home park setback: 10 feet · older manufactured-home park setback: 5 feet

    “Minimum lot size is ¾ ac. (32,670 SF) • Multi-sectional only (double wide)”
  • Mandatory utility hookupConditional

    Connection of residential, commercial or industrial buildings to a sanitary sewer or water main within a Sussex County sanitary or water district where the property abuts a street or public way containing a qualifying sewer or water main.

    • The county government may order connection when it deems connection necessary to preserve public health.
    • The property must be within a sanitary or water district and the building must be residential, commercial or industrial.
    • An owner who fails to comply within 60 days may face an action in Justice of the Peace Court in Sussex County or the Court of Chancery.
    • The cited rule does not establish a countywide requirement that every parcel connect regardless of district, availability or an order.

    compliance period after county order: 60 days

    “The county government may, where it deems it necessary to the preservation of public health, order the owner of any lot or parcel of land within a sanitary or water district which abuts upon a street or other public way containing a sanitary sewer or water main, which is part of or which is served, or may be served, by the county sewerage or water system, and upon which lot or parcel of land a building shall have been constructed for residential, commercial or industrial use, to connect such building with such sanitary sewer or water main.”
  • Subdividing landRegulated (with conditions)

    Major subdivisions processed by Sussex County Planning & Zoning in the county-administered area.

    • A pre-application meeting with County staff is required to discuss project design and application and Code requirements.
    • The application must be submitted with the required fee, preliminary subdivision plan, and applicable supporting documents.
    • Planning & Zoning staff review Code compliance and whether the application may proceed to a public hearing.
    • Legal notices are sent 28 days before the public hearing, which is held before the Planning & Zoning Commission.
    • After the decision, final subdivision plan approval requires staff review and no-objection letters from applicable state agencies, including DelDOT, Sussex Conservation District, Office of Drinking Water, and State Fire Marshal.
    • Requirements vary based on project scope and whether the property is in a flood zone, beach preservation area, town limits, or another special area.
    • The source describes an approximately 18-month process before the decision and an approximately 8-month final approval process.

    public-hearing notice period: 28 days · staff review period after TAC comments: 30 days

    “Step 5: Legal Notices Sent out 28 days prior to Public Hearing. Public Hearing held before the Planning & Zoning Commission.”
    One more reviewed finding on this topic
    • Regulated (with conditions) — Subdivision of land and related improvements regulated under Sussex County Code Chapter 99.
      “completion of all site improvements regulated under County Code Chapter 99 and stipulated by the approved subdivision plan.”
  • Building in a floodplainLimited

    Development, new construction, and substantial improvements in special flood hazard areas within Sussex County's jurisdiction, including applicable incorporated areas and county-administered areas.

    • The regulations apply to all special flood hazard areas within the jurisdiction of Sussex County.
    • Development and new construction must comply with the floodplain management regulations in effect at the time of permit issuance; development, new construction, and substantial improvements after the effective date of Ordinance No. 2384 must comply with that ordinance.
    • A floodplain permit application must be submitted before the actual start of construction.
    • Applications must include site plans, existing and proposed elevations, delineation of special flood hazard areas, floodway boundaries, flood zones, and base flood elevations, plus other information requested by the Floodplain Administrator.
    • For subdivision or development proposals containing at least 50 lots or at least 5 acres, whichever is lesser, where base flood elevations are not shown on the Flood Insurance Rate Maps, hydrologic and hydraulic engineering analyses and studies are required.
    • Within a designated floodway, encroachments including fill, new construction, substantial improvements, or other development are not permitted unless engineering analysis demonstrates that the encroachment will not increase flood levels during the base flood discharge; the analysis must be submitted to the Floodplain Administrator and FEMA and prepared by a Delaware-registered professional engineer.
    • A proposed floodway activity that would increase the base flood elevation may proceed only if FEMA has issued a Conditional Letter of Map Revision and the applicant completes the ordinance's additional requirements.
    • An accessory structure with a footprint of no more than 200 square feet may be allowed without elevation or floodproofing only if it is usable only for parking or limited storage, uses flood-damage-resistant materials below the base flood elevation, offers minimum resistance to floodwater flow, is firmly anchored, has elevated electrical and mechanical equipment, and has required flood openings.
    • The ordinance was added by Ordinance No. 2384 on January 20, 2015.

    minimum development size for required hydrologic and hydraulic studies where base flood elevations are absent: 50 lots or 5 acres, whichever is lesser (Applies to subdivision and development proposals where base flood elevations are not shown on the Flood Insurance Rate Maps.) · accessory-structure footprint exception: <= 200 square feet (Only if all listed parking/limited-storage, materials, anchoring, equipment-elevation, and flood-opening conditions are met.)

    “These regulations shall apply to all special flood hazard areas within the jurisdiction of Sussex County, as identified in § 115-141.1D, below. [...] It shall be unlawful for any person or entity to begin construction or other development which is wholly within, partially within, or in contact with any identified special flood hazard area, as established pursuant to this article [...] until a permit is obtained from Sussex County.”
    2 more reviewed findings on this topic
    • Required — Construction or other development wholly within, partially within, or in contact with an identified special flood hazard area in Sussex County.
      “It shall be unlawful for any person or entity to begin construction or other development [...] until a permit is obtained from Sussex County.”
    • Required — Structures and land development proposed within Sussex County special flood hazard areas, including development, construction, reconstruction, repair, extension, conversion, enlargement, or alteration.
      “development which is wholly within, partially within, or in contact with any identified special flood hazard area, [...] until a permit is obtained from Sussex County.”
  • Short-term rentalsLimited

    A proposed short-term rental consisting of two seasonal bungalows on a 0.8-acre parcel at 32293 Roxanna Road, Ocean View, Tax Map Parcel 134-12.00-379.01, in an AR-1 Agricultural Residential District.

    • The official county agenda describes the use as requiring a Conditional Use ordinance; this source does not establish countywide authorization for all short-term rentals.
    • The parcel is in an AR-1 Agricultural Residential District.
    • The agenda identifies the proposal as seasonal bungalows, two units, for short-term rental.

    seasonal bungalow units: 2 units · parcel area: 0.8 acre

    “Conditional Use of land [...] for the purpose of short-term rental”
  • Permit feesPublished (with conditions)

    Sussex County building permits, with different rates for properties outside incorporated municipalities that have their own zoning code and properties within such municipalities.

    • For properties not within incorporated municipalities that have their own Zoning Code, the fee is $7.50 for the first $1,000 of construction estimate and $3 for each $1,000 thereafter.
    • For properties within incorporated municipalities that have their own Zoning Code, the fee is $5.00 for the first $1,000 of construction estimate and $2 for each $1,000 thereafter.
    • The cited fee schedule is from the annual budget ordinance for the fiscal year ending June 30, 2023.

    building permit fee, unincorporated properties: 7.5 USD per first 1000 USD construction estimate ($3 for each $1,000 thereafter) · building permit fee, incorporated municipalities with own zoning code: 5 USD per first 1000 USD construction estimate ($2 for each $1,000 thereafter)

    “Building Code Building Permit $7.50 for the first $1,000 of construction estimate; $3 for each $1,000 thereafter”
  • Permit processPublished (with conditions)

    Construction of buildings in Sussex County.

    • A written application must be filed with the Department of Finance before construction begins and a permit must be obtained.
    • Applications must use forms prescribed by the Department of Finance and contain information prescribed by that department.
    • Permits may be issued to contractors, qualifying farm-building owners, owners of property in incorporated Sussex County cities or towns, and owners doing their own work.
    • No permit is required when the fair value of construction of a building is less than $300.
    • The Department of Finance performs necessary inspections and may order suspension of noncompliant work.

    permit exemption threshold: < 300 USD fair construction value

    “No person shall construct or commence the construction of a building without first filing with the Department of Finance an application in writing”

Delaware rules that apply here

  • Building code adoptedPartial

    Building construction statewide in Delaware, including the statewide Delaware State Fire Prevention Regulations and local building codes adopted by counties or municipalities.

    • The State Fire Prevention Commission's regulations have the force and effect of law in Delaware's counties, cities, and political subdivisions.
    • All buildings constructed after the regulation's applicability must meet applicable State Fire Prevention Regulations, Regulation 701 codes and standards, and any building code in effect within Delaware or a political subdivision.
    • County and municipal building-code adoption is authorized but not stated as universally mandatory by 16 Del. C. §7601.
    • A county, city, or local regulation or ordinance that is more stringent or imposes higher standards governs if it is not inconsistent with the State Fire Prevention Regulations and is not contrary to recognized standards and good engineering practices.
    • The State Fire Prevention Regulations state that they apply to all buildings, structures, marine vessels, premises, and conditions erected or modified.
    • The regulations do not apply to one- and two-family dwellings in their normal use or maintenance except where specific sections require application; the stated exceptions concern State Fire Marshal fire or explosion investigations and fire-prevention, dangerous-article, fire-control, exit, and enforcement duties.
    • The regulations become effective 10 days after publication as a final regulation.
    “In effect, the highest available energy conservation code of the ICC/IECC as adopted by the Delaware Energy Office shall be the minimum energy code for all new detached 1- and 2-story family dwellings and all other new residential buildings 3 stories or less in height.”
    One more reviewed finding on this topic
  • Who permits septicState

    On-site wastewater treatment and disposal systems in Sussex County, including siting, design, installation, operation, maintenance, rehabilitation, replacement, inspection and modification.

    • DNREC's Wastewater Disposal Program is the identified program overseeing septic systems.
    • Sussex County is identified as a service location/contact area, but the cited source assigns program oversight to DNREC.
    “The Wastewater Disposal Program oversees all aspects of the siting, design and installation of onsite wastewater treatment and disposal systems (known as septic systems).”
    One more reviewed finding on this topic
  • Septic permitRequired

    New or replacement on-site wastewater treatment and disposal systems, including small systems under 2,500 gallons per day, in Sussex County.

    • A site evaluation report prepared by a Class D soil scientist must be obtained first.
    • A licensed system designer must design the system and obtain the permit.
    • Gravity systems require a Class B designer; engineered or pressure-dosed systems require a Class C designer.
    • Systems must be installed by licensed Class E system contractors.
    • Moratorium areas may limit or prohibit construction under Section 3.23.

    small-system daily flow threshold: < 2500 gallons per day (Section 5.0 applies to systems with daily flow rates of less than 2,500 gallons.)

    “Hire a licensed system designer to design the septic system and obtain a permit. For gravity-based systems, use a Class B designer. For engineered or pressure-dosed systems, use a Class C designer.”
    One more reviewed finding on this topic
  • Septic inspectionRequired

    All Sussex County properties utilizing an on-site wastewater treatment and disposal system that are sold or otherwise transferred to other ownership.

    • The system must be pumped out by a Class F licensee and inspected by a Class H licensee, respectively, before completion of the sale.
    • An extension is given for sheriff sales, auctions, short sales, and cash sales for a period not exceeding 90 calendar days from the date of sale.
    • Inspection reports must be submitted to DNREC on approved forms within 72 hours after inspection completion.
    • For transfers of new property, a certificate of completion issued within the previous 24 months suffices.
    • If an inspection occurred within the previous 36 months, documented pump-out and inspection suffice, provided the system is not a cesspool or seepage pit.
    • Proof of a licensed operator or a service contract with a certified service provider satisfies the inspection requirement for an individual OWTDS.
    • Cesspools and seepage pits are prohibited and, when found, must be replaced within one year.

    inspection-report submission deadline: 72 hours (after inspection completion) · certificate of completion lookback: 24 months (new-property transfers) · prior inspection lookback: 36 months (documented pump-out and inspection; system cannot be a cesspool or seepage pit) · sale-extension maximum: <= 90 calendar days (sheriff sales, auctions, short sales, and cash sales; measured from date of sale)

    “For all properties utilizing an OWTDS that are sold or otherwise transferred to other ownership, the persons must have the system pumped out and inspected by a Class F and Class H licensee, respectively, prior to completion of the sale.”
    One more reviewed finding on this topic
  • Off-grid sanitationLimited

    Off-grid or onsite sanitation using wastewater treatment and disposal systems in Delaware.

    • All wastewater must be treated and disposed of in a manner approved by DNREC.
    • Wastewater may not be disposed of at a location other than one authorized by DNREC under applicable laws and regulations.
    • Discharge of untreated or partially treated wastewater or septic effluent onto the ground, into groundwater, or into surface waters is prohibited unless authorized by a DNREC permit.
    • Construction or repair of an onsite system requires a DNREC permit, except that certain emergency repairs may be excepted under the regulations.
    • Systems must be operated and maintained so they do not create a public health hazard or cause water pollution.
    “All wastewater shall be treated and disposed of in a manner approved by the Department.”
    One more reviewed finding on this topic
    • Limited — Permanent and temporary holding tanks used for off-grid wastewater sanitation at Sussex County properties.
      “The use of a holding tank on a permanent basis is prohibited except as provided in these Regulations. Permanent holding tanks are not permitted on unimproved lots. No person shall install a holding tank without first obtaining a permit from the Department.”
  • Well permitRequired

    Construction and use of wells regulated under Delaware Administrative Code Regulation 7301 statewide.

    • Before well construction activities commence, the property owner or authorized agent must obtain prior DNREC approval in the form of a well permit.
    • A well may not be constructed until DNREC has issued both a well permit and a call-in authorization number, unless otherwise authorized under subsection 3.13.
    • A well permit is not required for hand augured soil borings or other soil borings that do not intersect the water table, such as direct push soil borings.
    • A well permit is required for construction and use of all wells and lysimeters.
    • A permit is not required for repair or rehabilitation of a well or associated equipment when the physical dimensions of the well are not changed; a change in physical dimensions or exceedance of original capacity requires a permit application.
    • Well construction, repair, modification, or sealing must be performed by or under the direct on-site supervision of a licensed well driller or well driver.
    • Well permit applications must include the applicable application fee and advertisement fee, if applicable.
    “Before any well construction activities commence to install any well, as defined in Section 2.0, the property owner or property owner’s authorized agent must obtain the prior approval of the Department to construct the well in the form of a well permit.”
    One more reviewed finding on this topic
    • Required — Non-industrial water wells in Sussex County, including residential wells and wells withdrawing 50,000 gallons per day or less.
      “Applications for well construction and well use permits must be completed by a licensed water well contractor. The required application and reporting forms are available to licensed water well contractors upon request. A property owner’s signature is also required, unless submitted electronically.”
  • Agricultural exemptionAvailable (with conditions)

    Qualifying farming and related activities regulated under Delaware’s wetlands chapter.

    • Farming is exempt only on lands where, in the prior 10 years on a rolling basis, normal activities were conducted for agricultural crops or there was an intent to farm for agricultural crops.
    • The activity must be part of an established and ongoing operation for farming and production of agricultural crops.
    • The exemption is from permit requirements and other regulation under Title 7, Chapter 66; it does not establish a general exemption from county or municipal zoning, building, septic, or other laws.
    • Silvicultural activities must be permitted by the Delaware Department of Agriculture.

    lookback period: 10 years on a rolling basis (The activity must be part of an established and ongoing farming operation.)

    “Farming on any lands upon which, in the prior 10 years on a rolling basis, normal activities have been conducted either a. For the farming and production of agricultural crops; or b. Manifesting an intent to farm the land for the production of agricultural crops, including but not limited to, activities such as plowing, seeding, clearing, irrigation installation, haying, grazing of domestic animals and free ranging livestock or poultry, cultivating, and harvesting; provided that such activity is part of an established and ongoing operation for the farming and production of agricultural crops.”
  • Driveway accessRequired

    Constructing a new entrance or modifying an existing entrance, including a residential entrance opening onto a state-maintained roadway, in Sussex County and elsewhere in Delaware.

    • A DelDOT entrance permit is required before constructing a new entrance or modifying an existing entrance.
    • The requirement is administered by the Delaware Department of Transportation under Delaware Code Section 146(c), Chapter 1, Title 17, and Delaware Administrative Code Title 2 Del. Admin. C. § 2309-7.2.
    • Permit applications must be submitted online; applicants without computer access may contact the Public Works Office.
    • For Sussex County, the application may be submitted through DelDOT's online entrance-permit system by selecting Sussex County.
    • DelDOT lists a residential entrance type for an entrance that opens onto a state-maintained roadway and a residential waiver type for a driveway entrance within a neighborhood.
    • DelDOT states that it will review and comment within 15 calendar days after submission of all required supplemental documentation and, if acceptable and complete, authorize the permit request within 15 calendar days.
    • For Sussex County, the property owner is responsible for furnishing the purchase of the residential entrance drainage pipe, and DelDOT will install the entrance drainage pipe.
    • The DelDOT Development Coordination page lists Chapter 7 - Residential Access as effective April 2016.

    review period: 15 calendar days (After submission of all required supplemental documentation; additional information may extend processing.) · Sussex County entrance-permit contact phone: 302-853-1340 · Sussex County entrance-permit office address: 23697 DuPont Blvd, Georgetown, DE 19947

    “A: DelDOT Entrance Permit is required to construct a new entrance, or modify an existing entrance, in accordance with the Delaware Code, Section 146(c), Chapter 1, Title 17, and the Delaware Administrative Code, Title 2 Del. Admin. C. § 2309-7.2 "DelDOT Development Coordination Manual”.”
    3 more reviewed findings on this topic
    • Required — New, expanded, reconstructed, maintained, modified, or used entrances and driveways connecting property in Sussex County to a state-maintained highway or road.
      “No person [...] shall [...] use any crossing or entrance onto a state-maintained highway [...] without [...] having obtained a permit issued by the Department.”
    • Limited — Second access points for individual residential properties on non-subdivision streets in Sussex County where the access is to a State-maintained local or collector road.
      “a second access point may be granted if the property frontage allows for the proper spacing”
    • Required — Construction of a new entrance or modification of an existing entrance under DelDOT’s access-permit jurisdiction, including access to state-maintained roadways.
      “A: DelDOT Entrance Permit is required to construct a new entrance, or modify an existing entrance, in accordance with the Delaware Code, Section 146(c), Chapter 1, Title 17, and the Delaware Administrative Code, Title 2 Del. Admin. C. § 2309-7.2 "DelDOT Development Coordination Manual”.”
  • Campground & park staysProhibited

    Camping on lands administered by the Delaware Division of Fish and Wildlife.

    • Conservation-oriented groups may camp only with written permission of the Director and only in areas specified in the permit.
    “It shall be unlawful for any person to camp on lands administered by the Division, except conservation oriented groups may, with written permission of the Director, camp in areas specified in such permit.”

Still unanswered

We looked and could not find an official answer yet. Silence is not permission — ask the county directly.

  • Local zoning — Whether zoning controls vary among Sussex County municipalities or other local authorities.
  • Minimum lot size — Minimum lot size requirements in unincorporated Sussex County.
  • Lot coverage — Maximum lot coverage or percentage of lot occupied in unincorporated Sussex County.
  • Building height — Building-height limits in unincorporated Sussex County.

Each answer was extracted from an official source and independently re-checked against that source by a second reviewer. That is an evidence check, not legal advice. Rules change; confirm with the authority before you buy or build.

Living off-grid in Sussex County, Delaware

Is Sussex County a good place to live off-grid or homestead?

Sussex County scores 58/100 on the Bolthole Index, a solid county profile. Its strengths: strong self-sufficiency basics: 46.2″/yr rainfall plus 44.7% wooded land and mixed durability signals. Watch-outs: about 220,258 people within a 30-minute drive and more administrative friction around building and land use.

Do you need a building permit in Sussex County, Delaware?

Sussex County generally requires a residential building permit, and it enforces county zoning. Onsite septic is permitted by Delaware DNREC (Ground Water Discharges Section). Owner-builders may act as their own contractor to build their home. These answers are quoted from official sources and independently re-checked. Rules change and cities within the county differ — always confirm with the county before you buy or build.

Can you live in an RV or tiny home on your land in Sussex County?

Living in an RV on your own land in Sussex County is limited to specific cases: Use of an RV camper for habitation or a tourist-home use in Sussex County, including unincorporated county areas governed by the Sussex County Zoning Code. An RV camper cannot be considered a dwelling under the applicable County Codes when it is not on a fixed foundation, lacks permanent utility connections, and has water and wastewater arrangements of the type described in the source. The use is treated as a campground use even when there is only one camper or campsite. A tiny home is limited to specific cases. Confirm with the county before relying on it.

How much does land cost in Sussex County, Delaware?

Land in Sussex County runs about $9,642 per acre, based on the latest county data.

What is the water situation in Sussex County?

Sussex County gets about 46.2" of rain a year, with severe drought in roughly 4% of years.

How remote is Sussex County?

A representative private-land location has about 220,258 people within a 30-minute drive and 2,216,992 within two hours. The road-network catchments count population across county lines and clusters of smaller cities; straight-line radius values remain available as a comparison.

How Sussex compares in Delaware

Compare side-by-side →See all 3 Delaware counties ranked →