Bolthole Index

Skagit County, Washington

Building permits, zoning and septic rules in Skagit County, Washington

51Index Score / 100
#25 of 39 in Washington

Unincorporated Skagit County, Washington generally requires a building permit for construction, including a new home1. Planning & Development Services administers county zoning and building codes, while Skagit County Public Health permits on-site sewage systems23. An owner may qualify to work without contractor registration, but building and trade permits still apply4.

At a glance

Building permit
Generally required for construction in unincorporated Skagit County1
Zoning
Yes in unincorporated areas; allowed uses and dimensions vary by district25
Septic permit
Required for new and repair systems through Skagit County Public Health36
Owner-builder
You can work on your own property without contractor registration, but building permits still apply74
RV living
Temporary only: up to 180 days in any 12-month period, with one occupied RV per lot8
Minimum dwelling size
State building code requires at least 190 sq ft of habitable space9
Tiny home on wheels
A code-built tiny house may be up to 400 sq ft, but one that counts as an RV cannot serve as a dwelling or accessory dwelling unit1011
Septic soils
Only about 0.2% of the county's soils carry no severe rating for a conventional drain field12

Who to call

Building permits

Skagit County Planning & Development Services

Building permits, zoning administration, floodplain and grading permits, and plan review for unincorporated Skagit County

360-416-1320

pds@co.skagit.wa.us

1800 Continental Place, Mount Vernon, WA 98273

Online permits →

Septic permits

Skagit County Public Health

On-site sewage (septic) system permitting and inspection for Skagit County

(360) 416-1500

health@co.skagit.wa.us

301 Valley Mall Way, Suite 110, Mount Vernon, WA 98273

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 Skagit 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 Skagit County, Washington?

Yes. Unincorporated Skagit County generally requires the applicable building, mechanical, hot-water-tank replacement, demolition or grading permit for construction and related work1. The county has adopted Washington's building, residential, mechanical, plumbing, fire and energy codes, with local amendments13. A one-story detached building of no more than 200 square feet can be exempt only when it is not used for sleeping and meets the county's setback, flood, critical-area, plumbing and water-source conditions1. Permit exemptions do not make an otherwise regulated use or location legal1. After issuance, the inspection card identifies the project-specific inspections, which may cover setbacks, foundation, framing, trades, insulation, energy code, drywall and final occupancy14.

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

Skagit County Planning & Development Services is the building and zoning contact for unincorporated Skagit County213. The office is at 1800 Continental Place, Mount Vernon, WA 98273; call 360-416-1320, email pds@co.skagit.wa.us, or use the separate inspection line at 360-416-133015. County applications go through Civic Access, where applicants select the permit, provide the requested material, respond to corrections, complete related records and pay the invoice16. Complete septic, water, driveway-access and address approvals before submitting the building application17. Published fees vary by permit, valuation, review and inspection; building plan review is 65% of the permit fee, inspections are $155 per hour with a one-hour minimum, and a temporary certificate of occupancy costs $315 where applicable1819.

Does Skagit County have zoning?

Yes. Skagit County's Title 14 zoning applies in unincorporated areas; incorporated municipalities and tribal lands may have different authorities2. Allowed uses and dimensional standards depend on the parcel's mapped zoning district, so verify the district before relying on a countywide answer about setbacks, lot coverage or use5. Secondary Forest zoning has a 20-acre minimum lot size, while Industrial Forest zoning has an 80-acre minimum20. In Industrial Forest, a residence must support timber management, lie within 200 feet of a county road or state highway, and be within a fire district21. A qualifying Ag-NRL or RR-NRL lot of record may be divided to create a one-acre tract for an existing house only when the owner grants a conservation easement over the remainder22. The county materials do not establish one current zoning minimum dwelling size for every district; Planning & Development Services should confirm the standard for the parcel15.

How do septic permits work in Skagit County?

Skagit County Public Health reviews site evaluations and permits individual systems and community on-site systems below 3,500 gallons per day23. New and repair systems require county permit review and issuance6. An application includes the soil and site evaluation, site plan, proposed design and fees; repair permits expire after one year and other septic permits after three years24. Skagit County Public Health inspects the installation before backfill after the installer gives two full working days' notice, and routine inspection intervals range from one to three years by system type25. A structure not connected to sewer still needs an approved, permitted on-site sewage system for the county's listed new-construction, replacement, repair and capacity-increasing remodel situations; the county material does not establish approval for other off-grid sanitation methods26. Only about 0.2% of county soils avoid a severe conventional-drain-field rating, making a parcel-specific evaluation especially important12. Call Public Health at (360) 416-150027.

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

An RV cannot be used as a permanent or primary residence in Skagit County8. Temporary RV occupancy is limited to 180 days in any 12-month period, with no more than one occupied RV on a lot8. Floodway parcels have extra limits: an RV must remain licensed, highway-ready, wheeled and free of permanent additions, and it generally cannot remain there from November through April except for weekend or holiday use lasting no more than 14 days8. A tiny house on wheels may contain up to 400 square feet and must meet the Washington State Building Code, but foundation, installation and location approval depend on where it is placed10. A tiny home built on a trailer or park-model chassis that meets the county's recreational-vehicle definition does not qualify as a dwelling unit or as an accessory dwelling unit in unincorporated Skagit County11. Ask Planning & Development Services how the county would classify a specific tiny home before buying or placing one15.

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

  1. Identify the parcel's zoning district and allowed use with Planning & Development Services before designing the home515.
  2. Check flood and critical-area constraints; development in a Special Flood Hazard Area requires a flood permit, and a designated floodway defeats the small-building exemption281.
  3. Arrange water and sanitation; a licensed driller obtains an individual-well permit from the Washington State Department of Ecology, while Skagit County Public Health handles the septic permit296.
  4. Complete septic, water, driveway-access and address approvals before submitting the building application17.
  5. Apply and pay through Civic Access, then answer correction requests and complete related records16.
  6. An owner-builder exemption may remove contractor-registration requirements, but it does not remove building, electrical, plumbing or septic permits4.
  7. Follow the building inspection card and arrange the Public Health inspection before the septic system is backfilled1430.

What to check before you buy land in Skagit County

Confirm the zoning district and overlays before assuming a house, RV, subdivision or accessory use is allowed58. Secondary Forest and Industrial Forest alone illustrate the variation, with 20-acre and 80-acre minimum lots respectively20. For a subdivision, county rules govern roads, sewer or community-septic improvements, and driveway easements; those easements must be at least 20 feet wide and may need added width for cuts, fills or slopes31. Check FEMA-related constraints early because development in a Special Flood Hazard Area requires a county flood permit28. Test water and septic feasibility before closing: individual wells use a state permit obtained by a licensed driller, and only about 0.2% of county soils avoid a severe conventional-drain-field rating2912. Skagit County's effective property-tax rate is about 0.8%, and its median annual property-tax bill is about $4,0083233.

Watch-outs

  • Skagit County's 180-day RV allowance is temporary occupancy, not permission to use an RV as a permanent or primary home8.
  • A building-permit exemption for a small detached structure fails if the structure is used for sleeping or does not meet every listed setback, flood, critical-area, plumbing and water condition1.
  • The county materials do not establish one rule for utility connections on every parcel; ask Planning & Development Services and Public Health what the specific site requires1527.

Sources

  1. Construction Exempt from Building Permit, quoted and re-checked
  2. Building and Land Use Code, quoted and re-checked
  3. Sewage, quoted and re-checked
  4. RCW 18.27.090 Exemptions, quoted and re-checked
  5. Skagit County Unified Development Code, quoted and re-checked
  6. Sewage, quoted and re-checked
  7. Washington State Legislature - RCW 18.27.090 Exemptions (2026 county census)
  8. Floodway Construction, quoted and re-checked
  9. WAC 51-50-1208 — Section 1208—Interior space dimensions (Washington statewide rule), quoted and re-checked
  10. Tiny Houses (Washington statewide rule), quoted and re-checked
  11. Skagit County Code Chapter 14.18 — Use Standards and Use Definitions, quoted and re-checked
  12. 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
  13. Building and Land Use Code, quoted and re-checked
  14. skagitcounty.net, quoted and re-checked
  15. Skagit County Planning & Development Services (skagitcounty.net)
  16. Planning and Development Building Permit Page, quoted and re-checked
  17. Skagit County Planning and Development Services FAQ, quoted and re-checked
  18. Skagit County Permit Fee Schedules, quoted and re-checked
  19. skagitcounty.net, quoted and re-checked
  20. Agricultural and Forest Lands, quoted and re-checked
  21. Agricultural and Forest Lands, quoted and re-checked
  22. Agricultural and Forest Lands, quoted and re-checked
  23. Sewage, quoted and re-checked
  24. On Site Sewage Program Information, quoted and re-checked
  25. On Site Sewage Program Information, quoted and re-checked
  26. On Site Sewage Program Information, quoted and re-checked
  27. Skagit County Public Health (skagitcounty.net)
  28. Construction Exempt from a Building Permit, quoted and re-checked
  29. skagitcounty.net, quoted and re-checked
  30. On Site Sewage Program Information, quoted and re-checked
  31. Chapter 14.18 Land Divisions, quoted and re-checked
  32. Effective property tax rate: Bolthole Index county data
  33. Median property tax bill: Bolthole Index county data

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

Like all 6 of its neighbors, Skagit County has countywide zoning.

RuleSkagit CountyWhatcom CountySnohomish CountyIsland CountySan Juan CountyKitsap CountyKing County
Building permitRequiredRequiredRequiredRequiredRequiredLimitedRequired
County zoningYesYesYesYesYesYesYes
Septic permitsCounty Public HealthCounty Health & Community ServicesCounty Health Dept.County Public HealthCounty Health & Community ServicesKitsap Public Health DistrictPublic Health

County locator

Skagit County in Washington

51
County map
Skagit County highlighted among the Washington counties · colored by Index score

How Skagit County scores

Seclusion33100% ev.
Self-Sufficiency50100% ev.
Admin Boringness41100% ev.
Durability56100% ev.
Property Autonomy50100% ev.
Carry Cost43100% ev.

Evidence strength: 100%. This reports direct-source completeness and fallback use; it is separate from the score and is not a confidence interval. How it works →

$590kTypical home
0.8%Property tax
$14,280Land / acre
80"Annual rain
5.7% of yrsSevere drought
0.1 / yr (+0.1)Mid-century 100°F days
18.1 daysMid-century dry spell
2.61" (+6%)Mid-century 1-day rain
1.53×Wildfire change factor
100%Forward climate coverage
$1,178Home insurance / yr
2.1% / yrInsurance growth
0.52%Nonrenewal rate
county median (2+ published ZIPs)Insurance basis
1,420,574People within 2 hr
105,393Radius comparison (15 mi)
76People / sq mi
50.6%Federal land
19.8%Land at 15% slope or less
0.2%Soils rated "not limited" for septic (strict USDA rating)
2,310 acWorkable land screen
75.4%Wooded land
115 tonsBiomass / forest ac
46.3°FAvg temp

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Cities and towns in Skagit 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 Hamilton · Town of Lyman

Answers from the rulebook for Skagit County

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

Skagit County rules

  • Building permitRequired

    Construction, alteration, repair, movement, improvement, conversion, demolition, mechanical work, and related structures in unincorporated Skagit County.

    • Generally, a building permit or applicable mechanical, hot water tank replacement, demolition, or grading permit is required.
    • One-story detached buildings of 200 square feet or less may be exempt only if they are not used for sleeping, meet SCC 14.16.810 setbacks, are not in a Special Hazard Flood Area unless a flood permit has been approved, are not in a designated floodway, are not in a defined critical area or buffer unless approved after critical areas review, and contain no plumbing or have an approved County water source.
    • The cited handout also lists separate membrane-structure exemptions subject to conditions.

    small detached building exemption size: <= 200 square feet (Only when all listed exemption conditions are satisfied)

    “Generally, Skagit County requires a building permit (or a mechanical, hot water tank replacement, demolition or grading permit) anytime you erect, construct, enlarge, alter, repair, move, improve, convert, or demolish a building or structure”
  • Building code adoptedAdopted (with conditions)

    County building-code administration for unincorporated Skagit County, Lyman, and LaConner.

    • The county adopts by reference the same international building, residential, mechanical, plumbing, fire, and energy codes used throughout Washington; local amendments are listed in SCC 15.04.030.
    “Skagit County has adopted by reference the same international building, residential, mechanical, plumbing, fire, and energy codes that are in use throughout the State of Washington. Skagit County Code 15.04.020 adopts these codes, but because the codes are copyrighted, you won’t find the regulations on our code website.”
    One more reviewed finding on this topic
    • Adopted — County building, residential, mechanical, plumbing, fire, and energy codes.
      “Skagit County has adopted by reference the same international building, residential, mechanical, plumbing, fire, and energy codes”
  • InspectionsLimited

    County building permits and projects for which the inspection card includes listed inspections.

    • Inspections vary by project; the inspection card may include setbacks, foundation, framing, plumbing, mechanical, electrical, insulation, energy code, drywall, manufactured-home items, and final occupancy.
    “Inspections can vary for each project. An inspection card will be issued with your permit and may include:”
  • Certificate of occupancyLimited

    Projects requiring a change-of-use or occupancy permit or final occupancy approval.

    • The county fee schedule expressly lists a temporary certificate of occupancy; the available sources do not establish that every residential project requires a separate certificate.

    temporary certificate of occupancy fee: 315 USD

    “Temporary Certificate of Occupancy $315.00”
  • County-wide zoningPresent (with conditions)

    County zoning in unincorporated Skagit County.

    • The county page states the department administers local rules for unincorporated development; incorporated municipalities and the Swinomish Indian Tribal Community may administer separate zoning or permitting rules.
    “Skagit County’s land use and building regulations are adopted by ordinance and codified as Title 14 and Title 15 of the Skagit County Code (“SCC”). The Land Use/Development Code (Title 14) Generally, allowed land uses are listed in SCC Chapter 14.16, Zoning.”
    One more reviewed finding on this topic
    • Present (with conditions) — Land-use zoning in unincorporated Skagit County.
      “Generally, allowed land uses are listed in SCC Chapter 14.16, Zoning.”
  • Zoning districtsPublished

    County zoning districts and district-specific allowed uses and dimensional standards.

    • District-specific rules vary; the official county zoning PDF includes district chapters and standards.
    “UNIFIED DEVELOPMENT CODE Skagit County Code Title 14 TABLE OF CONTENTS With Attachments [...] 14. 16 ZONING”
  • Minimum dwelling sizeDistrict specific (with conditions)

    Loft living quarters in the RVC zone in Alger, an unincorporated Skagit County zoning district.

    • Loft living quarters are limited to four units.
    • Gross floor area may be no more than 75 percent of the primary use gross floor area.
    • Each unit must meet the County definition of an efficiency dwelling unit.
    • Each efficiency dwelling unit must contain a separate closet; kitchen facilities including a kitchen sink, cooking appliance and refrigeration facilities, each having a clear working space of not less than 30 inches in front; and a separate bathroom including a toilet, sink, and bathtub and/or shower.
    • The cited section identifies Ordinance O20250005 § 2 (Exh. A); the source does not state an effective date in the quoted passage.

    minimum floor area: >= 220 square feet · maximum loft units: 4 units · gross floor area relative to primary use: <= 75 percent

    “In the RVC zone in Alger, loft living quarters are limited to four units, provided gross floor area is no more than 75 percent of the primary use gross floor area. The size of each unit must meet, at a minimum, the definition of efficiency dwelling unit.”
  • Minimum lot sizeDistrict specific (with conditions)

    Commercial forest zoning districts in unincorporated Skagit County.

    • Secondary Forest zoning has a 20-acre minimum lot size; Industrial Forest zoning has an 80-acre minimum lot size.

    Secondary Forest minimum lot size: 20 acres · Industrial Forest minimum lot size: 80 acres

    “The County’s commercial forest zoning consists of Secondary Forest, which has a 20-acre minimum lot size; and Industrial Forest, with an 80-acre minimum lot size.”
  • SetbacksDistrict specific (with conditions)

    Residences in Industrial Forest zoning.

    • Residences must be accessory to timber management, located within 200 feet of a county road or state highway, and located within a fire district.

    maximum distance from county road or state highway: <= 200 feet

    “In Industrial Forest, residences must be accessory to timber management, located within 200 feet of a County road or state highway, and located within a fire district.”
  • Living in an RVTemporary only (with conditions)

    Use and occupancy of recreational vehicles in Skagit County.

    • An RV may not be used as a permanent or primary residence.
    • Occupancy is limited to no more than 180 days in any 12-month period.
    • Only one occupied RV may be present on any lot.
    • In the floodway, the RV must be fully licensed, ready for highway use without special highway permits, towable by a regular-duty truck without special licenses, on its wheels or jacking system, and without permanently attached additions.
    • An RV may not be present in the floodway from November through April except for weekend or holiday use of up to 14 days.
    • No more than two RVs are allowed on a lot in the floodway.

    maximum RV occupancy: <= 180 days in any 12-month period · occupied RVs per lot: <= 1 RV · RVs per lot in floodway: <= 2 RVs

    “No. RVs of any kind may only be used for temporary occupancy, i.e., no more than 180 days in any 12-month period. This rule applies everywhere in the County, and is further limited in the floodway (see above).”
    One more reviewed finding on this topic
    • Limited — Temporary and residential occupancy of recreational vehicles under county rules.
      “Skagit County does not permit using an RV as a dwelling unit or accessory dwelling unit. Temporarily occupying an RV is allowed, but:  no RV may be occupied for more than 180 days in any 12-month period; AND  only one occupied RV may be present on any lot.”
  • Tiny homesProhibited

    Permanent dwelling or accessory-dwelling occupancy of a tiny home that meets Skagit County’s recreational-vehicle definition, including RV-based tiny homes and park model trailers.

    • The rule applies to the unit when it is classified as a recreational vehicle under the County Code.
    • This claim addresses qualification as a dwelling unit or accessory dwelling unit; other temporary recreational or camping rules may separately apply.
    “A recreational vehicle does not qualify as a dwelling unit. [...] A recreational vehicle is not allowed as an accessory dwelling unit. A park model trailer is not allowed as an accessory dwelling unit.”
  • Who permits septicCounty

    Individual and community on-site sewage systems under 3,500 gallons per day.

    • Skagit County Code 12.05 and applicable state requirements also apply.

    community-system flow threshold: < 3500 gallons per day

    “The Health Department administers the Sewage Program at the Skagit County Planning and Development Serives Building [located at 1700 E. College Way, Mount Vernon, WA.; (360) 416-1320]. Site evaluations and permit applications for Individual On-site Sewage Disposal Systems and Community On-site Systems with flows under 3500 gallons per day are reviewed for compliance the with the regulations. (e.g. Skagit County Code 12.05)”
    One more reviewed finding on this topic
    • County — Individual on-site sewage systems and community systems under 3,500 gallons per day.
      “The Health Department administers the Sewage Program”
  • Septic permitRequired

    On-site sewage systems in Skagit County.

    • The application includes a site and soil evaluation, site plan, proposed design, required fees, and possible recorded maintenance agreement.
    • County review may require corrections or a site visit; repair permits expire after one year and other permits expire after three years.

    repair permit validity: 1 year · other septic permit validity: 3 years

    “Your system designer will submit a permit application, site and soil evaluation, site plan, and their proposed design through Civic Access. Once submitted, the required fees will be calculated and payment requested.”
    One more reviewed finding on this topic
    • Required — New and repair on-site sewage systems within Skagit County.
      “New and repair OSS permit application reviews and permit issuance”
  • Septic inspectionRequired

    Installation and ongoing operation of on-site sewage systems.

    • Skagit County Public Health conducts the final inspection before backfill; the installer must provide two full working days advance notice.
    • Routine inspections are required every one to three years depending on system type.

    final inspection notice: 2 full working days · routine inspection interval: 1–3 years

    “During the installation, Skagit County Public Health will conduct a final inspection to observe the installed system prior to backfill. Your installer must request an inspection 2 full working days advanced notice. [...] To keep your system functioning properly, plan for inspections every 1–3 years, pumping as needed, and occasional minor repairs.”
    One more reviewed finding on this topic
    • Required — Installation of on-site sewage systems and ongoing operation and maintenance of septic systems.
      “During the installation, Skagit County Public Health will conduct a final inspection to observe the installed system prior to backfill. Your installer must request an inspection 2 full working days advanced notice.”
  • Off-grid sanitationLimited

    On-site sanitation for structures not connected to sewer.

    • An approved and permitted on-site sewage system is required for the listed new construction, repair, replacement, and capacity-increasing remodel scenarios; other off-grid sanitation methods were not established.
    “If you are doing any of the following (WAC 246-272A-0200), you will need to take the steps outlined below to get your system installed and approved.”
  • Agricultural exemptionConditional

    Subdivision of a lot of record in Ag-NRL or RR-NRL for an existing house.

    • The property owner must donate a conservation easement for the remainder.

    tract size: 1 acre (existing house and qualifying Ag-NRL or RR-NRL lot of record)

    “The Skagit County Agricultural Land Preservation Code (SCC 14.16.860) zoning provision allows for the subdivision of a lot of record in Ag-NRL or RR-NRL into a one-acre tract for an existing house when the property owner donates by a conservation easement for the remainder.”
  • Subdividing landRegulated (with conditions)

    Plats and subdivisions governed by Skagit County Title 14 Chapter 14.18.

    • Roads must comply with Skagit County Road Standards unless otherwise approved by the County Engineer.
    • Public sewer or community septic systems must be constructed and stubouts provided, or appropriately bonded.
    • Driveway easements must meet International Fire Code Section 503 as amended by Skagit County and be at least 20 feet wide, with additional width as needed.

    minimum driveway easement width: >= 20 feet (Additional width may be required for cuts, fills, and slopes.)

    “Roads leading to or within a plat or subdivision [...] are constructed in compliance with Skagit County road standards”
  • Driveway accessRequired

    Building permit applications requiring access or driveway approval.

    • The county FAQ instructs applicants to have access/driveway permits or approvals completed before permit submittal.
    “Have septic, water, access (driveway) and address permits or approvals completed prior to permit submittal.”
  • Building in a floodplainRequired

    Development in a Special Flood Hazard Area or designated floodway in unincorporated Skagit County.

    • A flood permit is required in a Special Flood Hazard Area.
    • Building-permit exemptions do not apply in a designated floodway.
    • Certain otherwise exempt work may proceed only if a flood permit has been approved.
    “A floodplain project permit [...] must be obtained prior to construction or development on any property within a special flood hazard area”
  • Permit feesPublished

    Skagit County building, fire, land-use, public-health, and public-works permit fees.

    • Fees vary by permit type, valuation, review, inspection, and applicable surcharge.

    building plan review: 65% of building permit fee · inspection fee: 155 USD/hour (one-hour minimum) · temporary certificate of occupancy: 315 USD

    “Building Plan review 65% of building permit fee”
  • Permit processPublished (with conditions)

    County permit applications submitted through the Skagit County Civic Access portal.

    • Applicants create an account, select Apply, use the Decision Engine or application search, submit required information, respond to requests for additional information, complete sub-records, and pay the invoice through the portal.
    • Most commercial projects must attend a pre-development meeting unless otherwise determined by county staff.
    “All payments must be made through the portal.”

Washington rules that apply here

  • Owner-builder exemptionConditional

    An owner or other person performing construction-related contractor activities on the person's own property or personal residence under Washington contractor-registration law.

    • The exemption concerns registration provisions under chapter 18.27 RCW and does not itself eliminate applicable building, electrical, plumbing, mechanical, land-use, or inspection requirements.
    • For work on the person's own property, the exemption does not apply when the person performs contractor activities for the purpose of selling, demolishing, or leasing the property.
    • For an owner contracting with a registered contractor, the exemption does not apply to a person performing contractor activities to lease or sell improved property owned for less than twelve months.

    small-project contract threshold: < 500 USD (The threshold exemption does not apply when the work is part of a larger operation, contracts are divided to evade the chapter, or the person advertises as a contractor.)

    “The registration provisions of this chapter do not apply to: [...] (12) Any person working on his or her own property, whether occupied by him or her or not, and any person working on his or her personal residence, whether owned by him or her or not but this exemption shall not apply to any person who performs the activities of a contractor on his or her own property for the purpose of selling, demolishing, or leasing the property;”
    One more reviewed finding on this topic
    • Available (with conditions) — Washington contractor-registration requirements for persons working on their own property or personal residence, including Skagit County.
      “Any person working on his or her own property, whether occupied by him or her or not”
  • Building heightSpecified

    Buildings subject to Washington's state building code, with allowable height determined by occupancy classification and type of construction.

    • Table 504.3 is occupancy- and construction-type-specific.
    • The source states that Chapters 4 and 5 contain specific exceptions to the allowable height.
    • The table includes NS and UL entries; the source footnotes state that NS is only for evaluation of existing building height under the International Existing Building Code and that other entries have sprinkler-related conditions.

    allowable building height: occupancy-classification and construction-type specific values in Table 504.3 feet above grade plane (See Chapters 4 and 5 for specific exceptions.)

    “Allowable Building Height in Feet Above Grade Plane”
  • Manufactured homesLimited

    State statutory limits on county regulation of the placement or use of HUD-standard manufactured homes in Washington; site-specific occupancy remains subject to applicable local and state requirements.

    • The nondiscrimination and equal-siting rule applies to homes built to 42 U.S.C. Sec. 5401-5403 standards, as amended in 2000.
    • Except as provided in RCW 36.01.225(2), a county may require that a manufactured home be new.
    • Except as provided in RCW 36.01.225(2), a county may require a permanent foundation specified by the manufacturer and enclosure of the space from the bottom of the home to the ground with concrete or an approved concrete product, load bearing or decorative.
    • Except as provided in RCW 36.01.225(2), a county may require compliance with local design standards applicable to all other homes in the neighborhood.
    • Except as provided in RCW 36.01.225(2), a county may require thermal equivalence to the state energy code and all other requirements for a designated manufactured home under RCW 35.63.160.
    • A county may not restrict location in a manufactured/mobile home community legally in existence before June 12, 2008, based exclusively on the manufactured/mobile home's age or dimensions.
    • A county may not prohibit siting on an existing lot solely because existing separation and setback requirements regulating distance between homes are unmet.
    • A county may restrict location in a manufactured/mobile home community for other reasons, including failure to comply with fire, safety, other local ordinances, or state laws related to manufactured/mobile homes.
    • The statute does not override legally recorded covenants or deed restrictions of record and does not affect authority granted under chapter 43.22 RCW.

    community legal-existence date for age-or-dimensions protection: 2008-06-12 (Applies to manufactured/mobile home communities legally in existence before this date.)

    “A county may not adopt an ordinance that has the effect, directly or indirectly, of discriminating against consumers' choices in the placement or use of a home in such a manner that is not equally applicable to all homes. Homes built to 42 U.S.C. Sec. 5401-5403 standards (as amended in 2000) must be regulated for the purposes of siting in the same manner as site built homes, factory built homes, or homes built to any other state construction or local design standard.”
  • Accessory dwellingsAllowed (with conditions)

    Accessory dwelling units in portions of Washington cities, towns, and counties located within designated urban growth areas and subject to the Growth Management Act requirements

    • Cities and counties planning under the chapter must adopt or amend ordinances and development, zoning, and other official controls to implement the statutory requirements.
    • The requirements apply only in portions of towns, cities, and counties within designated urban growth areas.
    • Local governments may still apply public-health, safety, building-code, environmental-permitting, on-site-wastewater, and generally applicable development regulations.
    • Local governments may restrict or prohibit ADUs where development is restricted because of on-site sewage infrastructure, critical areas, or other unsuitable physical characteristics.
    • Under RCW 36.70A.681, at least two ADUs must be allowed on qualifying lots in configurations specified by statute, subject to listed exceptions and limitations.
    • The statutory requirements do not apply to lots designated with critical areas or buffers, or to specified impaired or threatened potable-water-reservoir watersheds.

    minimum ADUs in qualifying configurations: >= 2 accessory dwelling units per qualifying lot (Applies to lots in all zoning districts within an urban growth area that allow single-family homes, subject to statutory exceptions.)

    “The city or county must allow at least two accessory dwelling units on all lots that are located in all zoning districts within an urban growth area that allow for single-family homes in the following configurations:”
  • Well permitLimited

    Groundwater wells and groundwater uses statewide under Washington's water-right permit exemption.

    • Domestic use is exempt up to 5,000 gallons per day.
    • Industrial use is exempt up to 5,000 gallons per day.
    • Lawn or garden irrigation is exempt only for a half-acre or less.
    • Stockwater is exempt.
    • Only one permit-exempt use of each type is allowed for any one project, regardless of project size.
    • Withdrawals from multiple wells for one project are aggregated toward the exemption limits.
    • Local governments and other laws and rules may impose additional requirements and limits.
    • Use in excess of the listed amounts, use for other purposes, or use from a surface-water source requires applying for and receiving a water-right permit.
    • Before drilling, a notice of intent must be submitted to Ecology 72 hours before drilling starts; the NOI is not itself a permit or approval to use water.
    • Permit-exempt uses remain subject to state water law, including possible restrictions relating to senior water rights and Streamflow Restoration Act requirements.

    domestic groundwater use exemption: <= 5000 gallons per day (Per project, with withdrawals from multiple wells aggregated.) · industrial groundwater use exemption: <= 5000 gallons per day (Per project, with withdrawals from multiple wells aggregated.) · lawn or garden irrigation exemption: <= 0.5 acre (For lawn or garden irrigation.) · well construction notice: 72 hours before drilling (Notice of intent is not a permit, certificate, or water-right application.)

    “The groundwater permit exemption allows for four small uses of groundwater without a water right permit: Domestic uses of up to 5,000 gallons per day Industrial uses of up to 5,000 gallons per day Irrigation of a lawn or garden, a half-acre or less in size Stockwater”
    One more reviewed finding on this topic
    • Required — Drilling an individual well serving property in Skagit County.
      “In order to drill a well, a licensed driller will first obtain a permit from the State Department of Ecology.”
  • Mandatory utility hookupConditional

    Existing OSS failures and certain new developments statewide when public sewer service and applicable local requirements exist.

    • For an existing OSS failure within a sewer utility service area, the local health officer must require public-sewer connection if the sewer utility allows connection and adequate service is available within 200 feet measured along the usual or most feasible access route.
    • For an OSS repaired under Table X, connection is required when the local health officer deems it necessary to protect public health, adequate public sewer becomes available within 200 feet under the stated measurement rule, and the sewer utility allows connection.
    • Local boards of health may require new development to connect to protect public health.
    • Local boards of health shall require connection for new development or a development with a failing OSS when required by the comprehensive land use plan or development regulations.
    • The rule was filed March 1, 2024, and became effective April 1, 2025.

    public sewer availability distance: <= 200 feet (Measured from the existing building-drain/building-sewer connection, or where no building drain exists, from where the sewer line begins, along the usual or most feasible route of access.)

    “(b) Require connection to a public sewer system if the sewer utility allows the connection and has adequate public sewer services available within 200 feet from where the existing building drain connects to the existing building sewer, or where no building drain exists, within 200 feet from where the sewer line begins, as measured along the usual or most feasible route of access.”
  • Campground & park staysLimited

    Recreational vehicles in the context of Washington's manufactured/mobile-home community statutes

    • The rule defines an RV as temporary and transient living quarters.
    • The RV is not occupied as a primary residence.
    • The RV is not immobilized or permanently affixed to a manufactured/mobile home lot.
    • This claim does not establish general statewide siting permission on private land; local land-use and building rules may apply.
    “(12) "Recreational vehicle" means a travel trailer, motor home, truck camper, or camping trailer that is primarily designed and used as temporary living quarters, is either self-propelled or mounted on or drawn by another vehicle, is transient, is not occupied as a primary residence, and is not immobilized or permanently affixed to a manufactured/mobile home lot.”
    One more reviewed finding on this topic
    • Limited — Camping and temporary occupancy in Washington State Parks facilities
      “The maximum length of stay shall be no more than 10 nights in one park within a 30-day period. Total nights stayed by the same camping party must not exceed 90 nights per calendar year in all state parks. These limitations shall not apply to those individuals who meet the qualifications of WAC 352-32-280 and 352-32-285.”
  • county zoning authorityGeneral

    Washington counties adopting zoning and related official controls for county jurisdiction, including unincorporated areas.

    • A county must create a planning agency as authorized in RCW 36.70.030 and RCW 36.70.040 before engaging in the chapter's planning program.
    • Zoning maps may be adopted only for areas covered by a comprehensive plan containing at least a land use element and a circulation element.
    • Zoning regulations may address land uses, building location and dimensions, yards and open spaces, population density, lot coverage, parking, and minimum gross floor area requirements for single-family detached dwellings.
    • The cited enabling provisions do not state a population threshold, named-county limitation, or special geographic limitation.
    “Any board, by ordinance, may establish classifications, within each of which, specific controls are identified, and which will regulate:”
    One more reviewed finding on this topic
    • General — Washington counties may plan and adopt zoning and other official controls for county land, including unincorporated areas, through their boards and planning agencies.
      “Such official controls may include, but are not limited to, ordinances establishing zoning, subdivision control, platting, and adoption of detailed maps.”
  • county building authorityGeneral

    Washington counties requiring and enforcing building permits and adopting amendments to the state building code for residential construction within county jurisdiction, including unincorporated areas.

    • The state building code must be enforced by counties and cities within their jurisdictional boundaries.
    • A county without a building department must contract with another county, city, or approved inspection agency for enforcement.
    • County amendments may not diminish the minimum performance standards and objectives of the state building code.
    • Residential-building amendments are subject to approval by the state building code council under RCW 19.27.074(1)(b), except as provided by statute.
    • The building-permit definition incorporates exemptions in International Building Code section 105.2 and International Residential Code section R105.2.
    • Counties may adopt permit exemptions for certain specified R-3 or M-1 construction or alteration with total fair market value not exceeding $1,500, but the exemption does not remove substantive code standards.

    permit-exemption fair-market-value ceiling: <= 1500 USD (Applies only to certain construction or alteration of group R, division 3, or group M, division 1 occupancies under RCW 19.27.060(7); substantive code standards still apply.)

    “The state building code required by this chapter shall be enforced by the counties and cities. Any county or city not having a building department shall contract with another county, city, or inspection agency approved by the county or city for enforcement of the state building code within its jurisdictional boundaries.”

Still unanswered

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

  • Local zoning — Aggregate zoning across unincorporated Skagit County and incorporated municipalities.
  • Lot coverage — Lot coverage requirements in Skagit County zoning districts.
  • Camping on your land — Temporary camping on private land in Skagit County.
  • Short-term rentals — Short-term rentals in Skagit 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.

Water rights & wells in Skagit County

Whether a new home can legally get its own water here — the sub-state groundwater regime, from Washington’s water agency.

Actively managed

This basin is under active state management — new water use is scrutinized, though a domestic well is usually still allowed.

Household wellExempt up to a limit

RCW 90.44.050 exempts up to 5,000 gpd for domestic use, but the 2018 Streamflow Restoration Act caps NEW permit-exempt domestic wells at 3,000 gpd/connection in some basins and 950 gpd (350 gpd indoor in drought) in others, and new post-2020 wells in the adjudicating Nooksack basin are limited to ~500 gpd indoor.

Limit: 5,000 gpd base (RCW 90.44.050); capped to 3,000 or 950 gpd/connection in streamflow-restoration basins; ~500 gpd indoor for new Nooksack wells

Washington Dept of Ecology — Groundwater permit exemption ↗
  • Stillaguamish Basin Instream Flow Rule (WRIA 5)partial of county

    WAC 173-505 sets minimum instream flows; post-rule groundwater withdrawals in hydraulic continuity are junior and subject to interruption.

    WA Dept of Ecology ↗

Hybrid state (appropriation + riparian). Groundwater rules change and basin boundaries follow the aquifer, not the county line — confirm current well and appropriation rules with the Washington state water agency before you buy or drill.Groundwater governance as of Jul 2026, cited to each administering agency.

Living off-grid in Skagit County, Washington

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

Skagit County scores 51/100 on the Bolthole Index, a solid county profile. Watch-outs: about 105,393 people within 15 miles and more administrative friction around building and land use.

Do you need a building permit in Skagit County, Washington?

Skagit County generally requires a residential building permit, and it enforces county zoning. Onsite septic is permitted by Skagit County Public Health - On-Site Sewage Program. 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 Skagit County?

Living in an RV on your own land in Skagit County is allowed on a temporary basis only: Use and occupancy of recreational vehicles in Skagit County. An RV may not be used as a permanent or primary residence. Occupancy is limited to no more than 180 days in any 12-month period. A tiny home is prohibited. Confirm with the county before relying on it.

How much does land cost in Skagit County, Washington?

Land in Skagit County runs about $14,280 per acre, based on the latest county data.

What is the water situation in Skagit County?

Skagit County gets about 80" of rain a year, with severe drought in roughly 5.7% of years. On water rights, Skagit County lies in the Stillaguamish Basin Instream Flow Rule (WRIA 5) — WAC 173-505 sets minimum instream flows; post-rule groundwater withdrawals in hydraulic continuity are junior and subject to interruption..

How remote is Skagit County?

A typical private-land location has about 105,393 people within 15 miles and 7,156,650 within 100 miles. These radius catchments are the published fallback where road routing is unavailable.

How Skagit compares in Washington

Compare side-by-side →See all 39 Washington counties ranked →