Bolthole Index

Douglas County, Washington

Zoning, building permits and septic rules in the Town of Mansfield, Washington

The Town of Mansfield, Washington, in Douglas County, has its own zoning code that covers all land inside town limits1. Septic permits come from the Chelan-Douglas Health District2. We could not confirm how building permits are issued inside town limits, so call Mansfield Town Hall before you plan a build.

At a glance

Zoning
Yes, the town's own zoning code applies to all land inside Mansfield1
Building permit
State building code applies statewide; the town's permit process is not confirmed, so ask Town Hall3
Minimum lot (R-1, new)
8,500 sq ft for a single-family home; 7,000 sq ft on existing platted lots4
Front setback
25 feet from the property line, or 55 feet from the road center line if greater5
RV living
Temporary only: up to 2 RVs, 60 days in any 12 months6
Septic
Chelan-Douglas Health District permit2
Accessory dwelling
Limited to 850 sq ft where the district allows one7

Who to call

Building permits

Town of Mansfield Town Hall

Zoning administration and the first call for building permits and inspections inside town limits

(509) 683-1112

26 Main Street, Mansfield, WA 98830

Septic permits

Chelan-Douglas Health District Environmental Health

On-site septic permits and final inspections in Douglas County

Contact details are copied from each office’s official page and were checked against it on October 14, 2026.

Off-grid gear

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

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Does Mansfield, WA have zoning, and what does it mean for RVs, lot size and setbacks?

Yes. The Town of Mansfield's zoning code applies to all land inside town limits, and the mayor or a designee acts as zoning administrator1. The town uses R-1 single family, R-2 multi family, central business, public and industrial districts, and keeps the zoning map at Town Hall8.

In the R-1 district, a new single-family lot must be at least 8,500 square feet and 50 feet wide; existing platted lots can be as small as 7,000 square feet4. Buildings may cover no more than 35 percent of an R-1 lot9. In R-2, a single-family lot is also 8,500 square feet for new development, and the lot must be 70 feet wide10.

Front yards need 25 feet from the property line or 55 feet from the center line of the road, whichever is greater5. Accessory dwellings are capped at 850 square feet where a district permits them7. These rules are from the town's 2006 zoning code, and the town is updating its zoning, so confirm current text with Town Hall.

Can you live in an RV in Mansfield, WA?

Only for short stays. Mansfield's zoning code permits temporary occupancy of up to 2 recreational vehicles per lot for no more than 60 days in any 12-month period6. Each RV must be parked off the road outside the required front yard, no rent can be charged, and it must be hooked up to town water and sewer, with garbage service for stays over 14 days6. Year-round RV living on a lot is not what the code describes. We could not confirm a tiny-home rule for the town; ask Town Hall.

Do you need a building permit in Mansfield, WA, and who issues it?

We could not confirm the town's building permit process, so ask Mansfield Town Hall at (509) 683-111211. Washington applies its state building code in every city and county3. The town's own site lists a building permits and inspections page. Douglas County Land Services handles building permits only for unincorporated Douglas County, not inside Mansfield12.

How do septic permits work inside Mansfield, WA?

The Chelan-Douglas Health District permits on-site septic systems in Douglas County2. Any new installation, repair, modification or expansion of a septic system needs a Septic System Permit13. A lot not served by public sewer must have a site suitable for an on-site system14. Whether your lot in Mansfield must connect to town sewer is something we could not confirm; ask Town Hall, which also bills sewer and water.

What stays with Douglas County, and what should you check before you buy in Mansfield?

The county's rules for unincorporated Douglas County do not apply inside Mansfield. Septic permits are the part that stays outside town hands, with the health district2. For land outside town limits, see the Douglas County page. Before buying, ask Town Hall which zoning district the parcel is in, whether town water and sewer reach it, and what building permits and fees apply. Floodplain, driveway and permit-fee questions inside town limits are unconfirmed.

Watch-outs

  • Mansfield's zoning rules we could read come from a 2006 code, and the town is updating its zoning and comprehensive plan, so confirm current district rules with Town Hall at (509) 683-111211.
  • Building permit, inspection and fee rules inside Mansfield could not be confirmed; do not rely on Douglas County's unincorporated-area rules for a parcel inside town limits1.
  • RV stays are limited to 60 days in any 12 months with town water and sewer hookup, so an RV is not a place to live while you build6.

Sources

  1. Town of Mansfield Zoning Code (November 2006) (Town of Mansfield), quoted and re-checked
  2. On-Site Septic Program, quoted and re-checked
  3. RCW 19.27.031 — State building code—Adoption—Conflicts—Opinions (Washington statewide rule), quoted and re-checked
  4. Town of Mansfield Zoning Code (November 2006) (Town of Mansfield), quoted and re-checked
  5. Town of Mansfield Zoning Code (November 2006) (Town of Mansfield), quoted and re-checked
  6. Town of Mansfield Zoning Code (November 2006) (Town of Mansfield), quoted and re-checked
  7. Town of Mansfield Zoning Code (November 2006) (Town of Mansfield), quoted and re-checked
  8. Town of Mansfield Zoning Code (November 2006) (Town of Mansfield), quoted and re-checked
  9. Town of Mansfield Zoning Code (November 2006) (Town of Mansfield), quoted and re-checked
  10. Town of Mansfield Zoning Code (November 2006) (Town of Mansfield), quoted and re-checked
  11. Town of Mansfield Town Hall (mansfieldwa.municipalimpact.com)
  12. Building Construction Information, quoted and re-checked
  13. Service Providers & Licensed Designers, quoted and re-checked
  14. cdhd.wa.gov, quoted and re-checked

Written October 14, 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.

Answers from the rulebook for Town of Mansfield

Town of Mansfield’s own rules

  • Local zoningPresent

    All land inside Mansfield town limits

    • Administered by the mayor or designee as zoning administrator
    • Source is the November 2006 standalone Zoning Code PDF; the online code at mansfield.municipal.codes returned HTTP 403 and was not read
    “this code shall apply to all lands located within the town of mansfield to the extent authorized under the constitution and laws of the state of washington and of the united states.”
  • Zoning districtsPublished

    Use districts inside Mansfield town (R1, R2, CBD, P, I, mixed commercial/high density residential)

    • Zoning map is kept by the town; district use chart is in the code
    “4. development criteria. all development in the r-1 single family zoning district shall meet all of the applicable provisions of this code, as well as the following requirements:”
  • Minimum lot sizeSpecified

    R-1 single family district inside Mansfield town

    • Existing platted lots: 7,000 sq ft for single family; 13,000 sq ft for duplex
    • New developments: 8,500 sq ft single family; 13,000 sq ft duplex
    • Minimum lot width 50 feet
    • Maximum density four units per acre

    minimum lot size, new development, single family: >= 8500 sq ft (7,000 sq ft for existing platted lots)

    “b. minimum lot sizes - new developments: 1. single family residence = eight thousand five hundred (8,500) square feet. 2. duplex structure = thirteen thousand (13,000) square feet. c. minimum lot width: fifty (50) feet.”
    One more reviewed finding on this topic
    • Specified — R-2 multi family district inside Mansfield town
      “c. minimum lot sizes - multi family structure: thirteen thousand (13,000) square feet for the first two units, and an additional one thousand two hundred (1,200) square feet for each additional unit after that. d. minimum lot width: seventy (70) feet.”
  • SetbacksSpecified

    General front yard setback in all districts inside Mansfield town unless district rules say otherwise

    • Local access roads in residential subdivisions with sidewalks: 25 feet from front property line
    • Side and rear setbacks and other exceptions not captured here

    front yard setback from property line: >= 25 feet (or 55 feet from deeded road center line, whichever is greater)

    “a. front yard: no building or structure shall be erected nearer than fifty-five (55) feet from the deeded center line of any public or private road or highway, nor twenty-five (25) feet from the property line of any public or private road or highway, whichever distance is greater”
  • Lot coverageSpecified

    R-1 single family district inside Mansfield town

    • R-2 district limit is 40 percent

    maximum lot coverage: <= 35 percent

    “d. maximum lot coverage: not more than thirty-five (35%) percent of the area of any lot may be covered by buildings or structures.”
  • Living in an RVTemporary only (with conditions)

    Temporary occupancy of recreational vehicles on lots inside Mansfield town

    • Parked off-road outside required front yard
    • No rental or lease fees charged
    • Hooked up to city water and sewer; garbage service required for stays over 14 successive days
    • RV parks are defined separately for temporary placement, as opposed to permanent year-round occupancy

    maximum RVs per lot: <= 2 RVs · maximum stay: <= 60 days per 12 months

    “c. the temporary occupancy of not more than two (2) recreational vehicles per lot is permitted for a time period not exceeding sixty (60) days in any twelve (12) month period provided that the following minimum standards are met: 1. each unit is parked in an off-road space outside of any required front yard area; 2. no rental or lease fees are charged for temporary use or occupancy; and 3. the recreational vehicle(s) shall be hooked up to city water and sewer, and the occupants shall obtain garbage pick-up service for the duration of any stay that exceeds 14 successive days.”
  • Accessory dwellingsLimited

    Accessory dwellings where permitted by district inside Mansfield town

    • Only one accessory dwelling per lot
    • Manufactured or mobile homes not allowed as accessory dwellings
    • Must connect to primary dwelling utilities whenever feasible
    • Other district provisions such as setbacks and lot coverage apply
    • District use chart not read to confirm which districts permit them

    maximum floor area: <= 850 sq ft

    “15. accessory dwellings. where permitted, accessory dwellings shall comply with the following minimum provisions: a. accessory dwellings shall be limited to a maximum of eight hundred and fifty (850) square feet in floor area and must connect, whenever feasible, to the utilities (water, power, sewer) of the primary single family dwelling.”

Still unanswered

We looked and could not find an official answer yet. Silence is not permission; ask Town of Mansfield or Douglas County directly.

  • Building permit — Building permits inside Mansfield town
  • Owner-builder exemption — Owner-builder exemption inside Mansfield town
  • Building code adopted — Building code inside Mansfield town
  • Inspections — Building inspections inside Mansfield town
  • Certificate of occupancy — Certificate of occupancy inside Mansfield town
18 more unanswered
  • Minimum dwelling size
  • Building height
  • Camping on your land
  • Tiny homes
  • Manufactured homes
  • Who permits septic
  • Septic permit
  • Septic inspection
  • Off-grid sanitation
  • Well permit
  • Mandatory utility hookup
  • Agricultural exemption
  • Subdividing land
  • Driveway access
  • Building in a floodplain
  • Short-term rentals
  • Permit fees
  • Permit process

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.

Unanswered questions are usually a sign that Town of Mansfield publishes no rule on the point, not that none exists. Douglas County’s page lists the county offices to call.

← All of Douglas County: county rules, score and offices