Zoning, building permits and septic rules in Leavenworth, Washington

Leavenworth’s own rules

• Building permitRequired

  Most construction projects inside Leavenworth city limits.

  • Projects specifically exempted by Section 105 of the International Residential Code or International Building Code are excepted.
  • Zoning regulations apply regardless of a permit exemption.

  “Most construction projects will require a permit; unless specifically exempted by Section 105 of the International Residential Code or International Building Code.”

• Building code adoptedAdopted (with conditions)

  Buildings and structures inside Leavenworth city limits.

  • The codes are amended by the Washington State Building Code Council.
  • parameters are not separately stated on the City page.

  “The City of Leavenworth adopts codes, as amended by the Washington State Building Code Council”

• InspectionsLimited

  New, converted, or annexed bed-and-breakfast facilities inside Leavenworth city limits.

  • The inspection must occur before operations.
  • This claim does not establish a general inspection schedule for all building work.

  “New, converted, or annexed bed and breakfast facilities shall be inspected by the city of Leavenworth prior to operations.”

• Local zoningPresent (with conditions)

  Land and development inside Leavenworth city limits.

  • Projects require zoning and regulatory review by the City.

  “Every project requires review of zoning and regulations.”

• Zoning districtsPublished (with conditions)

  Zoning districts inside Leavenworth city limits.

  • The chart identifies RL6, R-8, MF, GC, CC, TC, CDMUI overlay, LI, REC, and RP.

  “Zoning Districts: (RL6) Residential Low Density 6,000. (R-8) Residential 8. (MF) Multifamily Residential. (GC) General Commercial. (CC) Central Commercial. (TC) Tourist Commercial. (CDMUI) Commercial District Mixed Use Incentives (overlay). (LI) Light Industrial. (REC) Recreation. (RP) Recreation-Public.”

• SetbacksSpecified

  Cottage houses and associated accessory buildings inside Leavenworth city limits.

  • Cottage-house setbacks apply regardless of zoning district.
  • Exceptions may be allowed under LMC § 18.30.060.

  “Setbacks. Regardless of zoning district, cottage houses and associated accessory buildings shall meet the following setbacks, unless exception is allowed in the provisions of LMC § 18.30.060:”

• Lot coverageSpecified

  Individual building lots with accessory dwelling units inside Leavenworth city limits.

  • The underlying district maximum applies to the principal single-family unit.
  • The five-percent increase may be used only to accommodate ADUs and not to enlarge the primary residence or other non-ADU structures.

  lot coverage increase per ADU: 5 percent (Solely to accommodate one or more ADUs)

  “Notwithstanding subsection (I)(1) of this section, the total allowable lot coverage may be increased by five percent for each accessory dwelling unit (ADU) located on the same lot.”

• Building heightSpecified

  Cottage houses inside Leavenworth city limits.

  • The limit applies regardless of underlying zoning.
  • The provision also states the height may not exceed 25 feet.

  cottage-house maximum height: <= 20 feet (Measured under LMC § 18.30.050; but not to exceed 25 feet)

  “Height. Regardless of the underlying zoning, a cottage house shall have a maximum height of 20 feet as measured in accordance with LMC § 18.30.050, but not to exceed 25 feet.”

• Tiny homesAllowed (with conditions)

  Tiny-home dwellings in RL6, R-8, and MF zoning districts inside Leavenworth city limits.

  • Uses must meet City standards.
  • A listed use marked P is permitted when meeting City regulations.

  “Dwelling, Tiny Home | P | P | P | | | | | | | |”

• Manufactured homesLimited

  Designated manufactured homes in RL6, R-8, and MF zoning districts inside Leavenworth city limits.

  • The unit must be a new manufactured home.
  • It must have the specified permanent foundation and comply with local design standards and designated-manufactured-home requirements.

  “The manufactured home installed shall be a "new manufactured home." Used mobile and manufactured homes are not allowed to be placed within the city limits.”

• Accessory dwellingsAllowed (with conditions)

  Accessory dwelling units in City zoning districts that allow single-family homes.

  • No more than two ADUs per building lot in conjunction with a single-family structure.
  • Each ADU requires an additional off-street parking space, subject to stated exceptions.
  • Total ADU gross floor area may not exceed 1,200 square feet.

  maximum accessory dwelling units per building lot: <= 2 ADUs (In conjunction with a single-family structure) · maximum total ADU gross floor area: <= 1200 square feet

  “Accessory dwelling units are permitted in all zoning districts that allow for single-family homes, provided the following minimum requirements are met:”

• Mandatory utility hookupWater and sewer (with conditions)

  Duplex and triplex dwellings inside Leavenworth city limits, except within the City's urban growth area.

  • Separate water and sewer utilities are required for each unit.
  • The code expressly excepts locations within the City's urban growth area.

  “Except within the city's urban growth area, separate water and sewer utilities shall be required for each unit.”

• Subdividing landRegulated (with conditions)

  Subdivision applications inside Leavenworth city limits.

  • Planning reviews land-use applications including subdivisions.
  • Land-use applications are submitted electronically; a pre-application meeting is recommended for large or complex projects but is not required before submittal.

  “Reviewing land use applications such as subdivisions, conditional use permits, variances, shoreline permits and design review permits”

• Driveway accessLimited

  Driveways accessing bed-and-breakfast facilities inside Leavenworth city limits that are more than 100 feet long.

  • The required improved width is at least 12 feet.
  • Appropriately spaced cutouts must facilitate two vehicles travelling in opposite directions.

  driveway length threshold: > 100 feet · minimum improved driveway width: >= 12 feet (Driveways accessing a bed and breakfast exceeding 100 feet in length)

  “Driveways accessing a bed and breakfast which are more than 100 feet in length shall have an improved width of at least 12 feet”

• Permit processPublished (with conditions)

  Land-use permit applications inside Leavenworth city limits.

  • A pre-application meeting is recommended for large, more complex projects but is not required before submittal.

  “Land use permit applications shall be submitted electronically through the City’s online permit portal.”

Still unanswered

We looked and could not find an official answer yet. Silence is not permission; ask Leavenworth or Chelan County directly.

• Owner-builder exemption — Owner-built construction inside Leavenworth city limits.
• Certificate of occupancy — Occupancy of buildings inside Leavenworth city limits.
• Minimum dwelling size — Principal single-family dwellings inside Leavenworth city limits.
• Minimum lot size — Principal single-family residential development inside Leavenworth city limits.
• Living in an RV — Residential occupancy of recreational vehicles on private land inside Leavenworth city limits.

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.

Off-grid gear

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

• Water Crystal Quest Filter any source — well, rain, or creek — to drinking-clean.
• Power Bluetti Solar generators and home battery backup for living off the grid.
• Septic Soil percolation test kit Run your own perc test before paying an engineer — the first thing a septic office asks about.
• Water Well water test kit Bacteria, nitrates, hardness — know what the well on a parcel is really pumping.

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