Building permits, zoning and rural land rules across Delaware

At a glance

Residential building permits

3 counties require them; 0 have no requirement and 0 require them only in limited cases.¹⁷⁸

County zoning

3 counties have zoning; 0 have neither residential building permits nor county zoning.⁹¹⁰

Septic permits

Delaware DNREC issues septic permits in all 3 counties.⁴

RV living

2 counties have an answer: Sussex is limited; Kent prohibits permanent or long-term occupancy.⁵

Tiny homes

3 counties have an answer: New Castle allows qualifying accessory homes; Sussex and Kent impose limits.⁶

Owner electrical work

Owner-occupants may use the conditional homeowner electrical-permit program; approved plan review and inspections are required.¹¹

Water wells

DNREC well approval is required before construction; licensed well professionals must perform or supervise the work.¹²

Property tax

Median county effective rate: 0.5%; median county tax bill: $1,331 per year.¹³

Who to call

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

Which Delaware counties don't require a building permit?

No Delaware county falls into the no-residential-building-permit category, and none requires a residential building permit only in limited cases.⁷⁸ Sussex County, Kent County and New Castle County all require residential building permits for unincorporated land.¹ Delaware authorizes local building-code administration rather than providing a uniform statewide application and inspection procedure, and county code-enforcement fees are not a single statewide amount.¹⁴¹⁵

For owner electrical work, Delaware's homeowner-permit program requires an owner-occupant, approved inspection-agency plan review and inspections; homes for sale or rent do not qualify.¹¹ Use the Delaware owner-builder county list alongside those electrical-program conditions.¹¹

Which Delaware counties have no zoning?

None of Delaware's 3 counties is in the no-county-zoning category; all have county zoning.²⁹ No Delaware county combines no residential building permit with no county zoning.¹⁰ Delaware delegates land-use planning and regulation to counties and municipalities, so a county comparison does not establish the zoning rules inside a city or town.³

Ask the applicable county or municipal planning office for the parcel's district and current zoning requirements before choosing a house design or temporary living arrangement: Delaware's statewide planning source does not supply a single statewide district map or complete district schedule.³

Who issues septic permits in Delaware?

Delaware DNREC issues septic permits in all 3 counties.⁴ Construction or repair of an onsite wastewater system requires a DNREC permit, apart from certain emergency-repair exceptions.¹⁶ Start with a licensed Class D soil scientist's site evaluation to determine the disposal-system type the parcel can support, then hire a licensed designer to design the system and obtain its permit.¹⁷ Licensed Class E contractors install Delaware septic systems.¹⁷

Required DNREC wastewater-discharge and groundwater-withdrawal permits must be obtained before a local government issues a building, placement or occupancy permit, making water and wastewater approval an early step rather than an afterthought.¹⁸ Off-grid sanitation still requires DNREC-approved wastewater treatment and disposal.¹⁹

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

Delaware has county-level RV answers for 2 counties: Sussex is classified as limited, while Kent prohibits permanent habitation or long-term occupancy and describes a temporary emergency-residence exception.⁵ New Castle's absence from those RV answers is not permission to live in an RV; ask New Castle's land-use office before buying an RV for residential use.⁵

All 3 Delaware counties have tiny-home answers: New Castle County allows qualifying tiny homes as accessory dwelling units on qualifying detached single-family residential lots, while Sussex and Kent are classified as limited.⁶ Use the Delaware tiny-home county list to compare the available answers.⁶ Delaware's housing-code floor-area standard is occupant-based, subject to the code's exemptions and health-and-safety applicability conditions; that standard alone does not establish local tiny-home siting permission.²⁰³

Where are the best Delaware counties for a bolthole?

Delaware's Bolthole Index ranking puts Sussex County at 58, Kent County at 51 and New Castle County at 46, on a scale of 100; each requires residential building permits, has zoning and uses state septic permitting.²¹ The ranking therefore offers no Delaware county where both residential building permits and county zoning disappear.¹⁰

The median county farmland value is $9,642 per acre, with Kent at $8,679 per acre; these are USDA agricultural values, not asking prices for individual buildable lots.²² The median county effective property-tax rate is 0.5%, and the median county property-tax bill is $1,331 per year.¹³ Compare the local zoning district and DNREC wastewater requirements alongside those costs when choosing a parcel.³¹⁶

What water-well and driveway approvals do you need in Delaware?

Delaware requires prior DNREC well approval before regulated well construction, and construction generally cannot start until DNREC issues the well permit and call-in authorization number.¹² A licensed well driller or well driver must perform or directly supervise well construction, repair, modification or sealing.¹² Ask DNREC's Wells/Well Permits contact about the proposed domestic well.²³

For a new or modified entrance under DelDOT jurisdiction, including access to state-maintained roads, obtain a DelDOT entrance permit before construction.²⁴ DelDOT's online entrance application directs applicants to choose the county where the entrance permit is needed.²⁵ Address well construction, wastewater approval and road access before relying on a parcel for a new home.¹²¹⁸²⁴

Watch-outs

• Delaware county comparisons apply to unincorporated land; obtain the municipality's zoning rules for a parcel inside city limits.³
• Delaware local floodplain administrators review development in mapped Special Flood Hazard Areas in jurisdictions participating in the National Flood Insurance Program.²⁶
• A Delaware building intended for human habitation or occupancy must have a separate sewer connection when its premises abut a street containing a public sewer.²⁷
• We could not confirm a statewide Delaware RV-residence rule or a single statewide lot-size or setback schedule; ask the county or municipal planning office about the parcel's proposed use and zoning district.³

Sources

1. Bolthole Index county rulebook, 3 Delaware counties, as of October 10, 2026: Delaware counties that require a residential building permit in unincorporated areas
2. Bolthole Index county rulebook, 3 Delaware counties, as of October 10, 2026: Delaware counties with no county-wide zoning
3. Delaware: 2020 Delaware Strategies for State Policies and Spending, quoted and re-checked
4. Bolthole Index county rulebook, 3 Delaware counties, as of October 10, 2026: Who issues septic permits across Delaware's counties: a state agency, a multi-county health district, or the county
5. Bolthole Index county rulebook, 3 Delaware counties, as of October 10, 2026: Delaware counties' answers on living in an RV on your own land
6. Bolthole Index county rulebook, 3 Delaware counties, as of October 10, 2026: Delaware counties' answers on living in a tiny home on your own land
7. Bolthole Index county rulebook, 3 Delaware counties, as of October 10, 2026: Delaware counties that do not require a residential building permit in unincorporated areas
8. Bolthole Index county rulebook, 3 Delaware counties, as of October 10, 2026: Delaware counties that require a residential building permit only in some cases (for example floodplain or certain structures)
9. Bolthole Index county rulebook, 3 Delaware counties, as of October 10, 2026: Delaware counties with county zoning
10. Bolthole Index county rulebook, 3 Delaware counties, as of October 10, 2026: Delaware counties with neither a residential building permit nor county-wide zoning
11. Delaware: Homeowner Permit, quoted and re-checked
12. Delaware: 7301 Regulations Governing the Construction and Use of Wells, quoted and re-checked
13. Bolthole Index county rulebook, 3 Delaware counties, as of October 10, 2026: Median of Delaware's county effective property tax rates and median county property tax bills
14. Delaware: Title 16, Chapter 76: County or Municipal Building, Plumbing, Electrical and Other Codes, quoted and re-checked
15. Delaware: Title 16, Chapter 76: County or Municipal Building, Plumbing, Electrical and Other Codes, quoted and re-checked
16. Delaware: 7101 Regulations Governing the Design, Installation and Operation of On-Site Wastewater Treatment and Disposal Systems, quoted and re-checked
17. DNREC Division of Water — Residential Services Section (dnrec.delaware.gov)
18. Delaware: Delaware Code Title 7, § 6003, quoted and re-checked
19. Delaware: 7101 Regulations Governing the Design, Installation and Operation of On-Site Wastewater Treatment and Disposal Systems, quoted and re-checked
20. Delaware: Delaware State Housing Code, Title 31, Chapter 41, Subchapter II, quoted and re-checked
21. Bolthole Index county rulebook, 3 Delaware counties, as of October 10, 2026: The 3 highest-scoring Delaware counties on the Bolthole Index (off-grid and homestead land score out of 100), with each one's building-permit, zoning and septic answers
22. Bolthole Index county rulebook, 3 Delaware counties, as of October 10, 2026: Median farmland value per acre across Delaware's counties (USDA census, the middle county's value; USD/acre), with the five least expensive counties
23. DNREC Division of Water — Wells/Well Permits (dnrec.delaware.gov)
24. Delaware: Entrance Permit System - Frequently Asked Questions, quoted and re-checked
25. Delaware Department of Transportation — Entrance Permit System (deldot.gov)
26. Delaware: Floodplain Management, quoted and re-checked
27. Delaware: delcode.delaware.gov, 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.