Dimensional standards
Height & bulk
Servicing
- Geographic extent
- Citywide for ADUs and JADUs
Extracted standards
29 individual requirements pulled out of this section’s prose, each with the sentence it came from.
Design
- Maximum non-livable space attached to detached ADUAccessory dwelling unit (ADU)A second, smaller home on a lot that already has one — a garage flat, basement flat or backyard cottage.500 sqftsq ftSquare feet. An acre is 43,560 sq ft; a typical suburban lot is 7,000–10,000.
The maximum size for any non-livable space (e.g., garage) that is attached to a detached ADU shall be five hundred square feet.
- Minimum interior wall heightMaximum heightThe tallest a building may be, given in feet, in storeys, or both — whichever binds first. of ADUAccessory dwelling unit (ADU)A second, smaller home on a lot that already has one — a garage flat, basement flat or backyard cottage.7 ft
The interior horizontal dimensions of an ADU must be at least ten feet wide in every direction, with a minimum interior wall height of seven feet.
- Minimum interior width of ADUAccessory dwelling unit (ADU)A second, smaller home on a lot that already has one — a garage flat, basement flat or backyard cottage.10 ft
The interior horizontal dimensions of an ADU must be at least ten feet wide in every direction, with a minimum interior wall height of seven feet.
Height
- Maximum heightMaximum heightThe tallest a building may be, given in feet, in storeys, or both — whichever binds first. of detached ADUAccessory dwelling unit (ADU)A second, smaller home on a lot that already has one — a garage flat, basement flat or backyard cottage.16 ft
a detached ADU created on a lot with an existing or proposed single family or multi-family dwelling unit may not exceed sixteen feet in height.
- Maximum heightMaximum heightThe tallest a building may be, given in feet, in storeys, or both — whichever binds first. of detached ADUAccessory dwelling unit (ADU)A second, smaller home on a lot that already has one — a garage flat, basement flat or backyard cottage. near transit18 ft
A detached ADU may be up to eighteen feet in height if it is created on a lot with an existing or proposed single family or multi-family dwelling unit that is located within one-half mile walking distance of a major transit stop or high quality transit corridor...
- Maximum heightMaximum heightThe tallest a building may be, given in feet, in storeys, or both — whichever binds first. of detached ADUAccessory dwelling unit (ADU)A second, smaller home on a lot that already has one — a garage flat, basement flat or backyard cottage. near transit with roof pitch20 ft
...and the ADU may be up to two additional feet in height (for a maximum of twenty feet) if necessary to accommodate a roof pitch on the ADU that is aligned with the roof pitch of the primary dwelling unit.
- Maximum heightMaximum heightThe tallest a building may be, given in feet, in storeys, or both — whichever binds first. of detached ADUAccessory dwelling unit (ADU)A second, smaller home on a lot that already has one — a garage flat, basement flat or backyard cottage. on multi-familyMultifamily dwellingA building of four or more dwelling units. Where zoning is most restrictive. lot with >1 story18 ft
A detached ADU created on a lot with an existing or proposed multi-family dwelling that has more than one story above grade may not exceed 18 feet in height.
- Maximum heightMaximum heightThe tallest a building may be, given in feet, in storeys, or both — whichever binds first. of attached ADUAccessory dwelling unit (ADU)A second, smaller home on a lot that already has one — a garage flat, basement flat or backyard cottage.25 ft
An ADU that is attached to the primary dwelling may not exceed twenty-five feet in height or the height limitation imposed by the underlying zone that applies to the primary dwelling, whichever is lower.
- Maximum storiesStoreysHabitable floor levels. Whether a basement or attic counts is defined by the local code. for attached ADUAccessory dwelling unit (ADU)A second, smaller home on a lot that already has one — a garage flat, basement flat or backyard cottage.2 storiesStoreysHabitable floor levels. Whether a basement or attic counts is defined by the local code.
Notwithstanding the foregoing, ADUs subject to this Paragraph 21.58.050(B)4. may not exceed two stories.
Landscaping & trees
- Minimum canopy trees per ADUAccessory dwelling unit (ADU)A second, smaller home on a lot that already has one — a garage flat, basement flat or backyard cottage./JADU1 trees
At least one fifteen-gallon size canopy tree shall be planted for every ADU and JADU.
- Minimum tree size15 gallons
At least one fifteen-gallon size canopy tree shall be planted for every ADU and JADU.
Lighting
- Outdoor lighting must be shielded
Outdoor lighting shall be shielded so that the light source is not visible from off-site. Shielding shall be at least two inches in dimension measured from the lens or light source to direct light toward buildings or the ground and reduce glare.
Other
- ADUAccessory dwelling unit (ADU)A second, smaller home on a lot that already has one — a garage flat, basement flat or backyard cottage. size under which no impact fee is required750 sqftsq ftSquare feet. An acre is 43,560 sq ft; a typical suburban lot is 7,000–10,000.
No impact fee is required for an ADU that is less than seven hundred fifty square feet in size.
- Maximum attached ADUAccessory dwelling unit (ADU)A second, smaller home on a lot that already has one — a garage flat, basement flat or backyard cottage. size as % of primary dwelling50 pct
An attached ADU that is created on a lot with an existing primary dwelling is further limited to fifty percent of the floor area of the existing primary dwelling.
- Maximum ADUAccessory dwelling unit (ADU)A second, smaller home on a lot that already has one — a garage flat, basement flat or backyard cottage. size (single-familySingle-family dwellingOne dwelling unit on its own lot, usually detached from its neighbours. lot)1,200 sqftsq ftSquare feet. An acre is 43,560 sq ft; a typical suburban lot is 7,000–10,000.
The maximum size of a detached or attached ADU subject to this Section 21.58.060 (Local ADU Requirements) and proposed on a lot with a single-family dwelling is one thousand two hundred square feet.
- Maximum ADUAccessory dwelling unit (ADU)A second, smaller home on a lot that already has one — a garage flat, basement flat or backyard cottage. size (multi-familyMultifamily dwellingA building of four or more dwelling units. Where zoning is most restrictive. lot, studio/1BR)850 sqftsq ftSquare feet. An acre is 43,560 sq ft; a typical suburban lot is 7,000–10,000.
The maximum size of a detached or attached ADU subject to this Section 21.58.060 (Local ADU Requirements) and proposed on a lot with a multi-family dwelling is eight hundred fifty square feet for a studio or one-bedroom unit...
- Maximum ADUAccessory dwelling unit (ADU)A second, smaller home on a lot that already has one — a garage flat, basement flat or backyard cottage. size (multi-familyMultifamily dwellingA building of four or more dwelling units. Where zoning is most restrictive. lot, 2+BR)1,000 sqftsq ftSquare feet. An acre is 43,560 sq ft; a typical suburban lot is 7,000–10,000.
...and one thousand square feet for a unit with two or more bedrooms.
- Maximum lot coverageLot coverageThe share of a lot that buildings may cover, as a percentage. with ADUAccessory dwelling unit (ADU)A second, smaller home on a lot that already has one — a garage flat, basement flat or backyard cottage.50 pct
No ADU subject to this Section 21.58.060 (Local ADU Requirements) may cause the total lot coverage of the lot to exceed fifty percent, subject to Subsection 21.58.060(B).
- Minimum ADUAccessory dwelling unit (ADU)A second, smaller home on a lot that already has one — a garage flat, basement flat or backyard cottage. size (not reduced by other standards)800 sqftsq ftSquare feet. An acre is 43,560 sq ft; a typical suburban lot is 7,000–10,000.
...no application of the percent-based size limit in Paragraph 21.58.060(A)3. or of a front setback, lot coverage limit, or open-space requirement may require the ADU to be less than eight hundred square feet.
- Minimum separation between ADUAccessory dwelling unit (ADU)A second, smaller home on a lot that already has one — a garage flat, basement flat or backyard cottage. and other structures6 ft
Minimum separation of six feet shall be maintained between an ADU and other structures on the property (excepting structures to which they are attached).
- Minimum front setbackSetbackThe distance a building must be held back from a lot line. for ADUAccessory dwelling unit (ADU)A second, smaller home on a lot that already has one — a garage flat, basement flat or backyard cottage.15 ft
ADUs that are subject to this Section 21.58.060 (Local ADU Requirements) must conform to a fifteen-foot minimum front setback (twenty-foot setback to any garage door)...
- Minimum front setbackSetbackThe distance a building must be held back from a lot line. for ADUAccessory dwelling unit (ADU)A second, smaller home on a lot that already has one — a garage flat, basement flat or backyard cottage. (R-1 B-3, R-1 B-4, R-1 B-5)20 ft
In the R-1 B-3, R-1 B-4, and R-1 B-5 zoning districts, the ADU must conform to a twenty-foot minimum front setback...
- Minimum front setbackSetbackThe distance a building must be held back from a lot line. for ADUAccessory dwelling unit (ADU)A second, smaller home on a lot that already has one — a garage flat, basement flat or backyard cottage. (R-2, R-3, R-4, R-5 from arterial)25 ft
In the R-2, R-3, R-4 and R-5, the ADU must conform to a twenty-five-foot minimum front setback from an arterial street.
- Minimum dimension of private open spaceOpen spaceLand a development must leave unbuilt, sometimes required to be usable or planted.10 ft
an ADU subject to this Section 21.58.060 (Local ADU Requirements) must provide at least two hundred square feet of private open space with a minimum dimension of ten feet.
- Minimum private open spaceOpen spaceLand a development must leave unbuilt, sometimes required to be usable or planted. for ADUAccessory dwelling unit (ADU)A second, smaller home on a lot that already has one — a garage flat, basement flat or backyard cottage.200 sqftsq ftSquare feet. An acre is 43,560 sq ft; a typical suburban lot is 7,000–10,000.
an ADU subject to this Section 21.58.060 (Local ADU Requirements) must provide at least two hundred square feet of private open space with a minimum dimension of ten feet.
- Minimum rear setbackSetbackThe distance a building must be held back from a lot line. for ADUAccessory dwelling unit (ADU)A second, smaller home on a lot that already has one — a garage flat, basement flat or backyard cottage.4 ft
ADUs that are subject to this Section 21.58.060 (Local ADU Requirements) must conform to four-foot minimum side and rear setbacks.
- Minimum rental term for ADUAccessory dwelling unit (ADU)A second, smaller home on a lot that already has one — a garage flat, basement flat or backyard cottage./JADU30 days
No ADU or JADU may be rented for a term that is shorter than thirty days.
- Minimum side setbackSetbackThe distance a building must be held back from a lot line. for ADUAccessory dwelling unit (ADU)A second, smaller home on a lot that already has one — a garage flat, basement flat or backyard cottage.4 ft
ADUs that are subject to this Section 21.58.060 (Local ADU Requirements) must conform to four-foot minimum side and rear setbacks.
- Owner occupancy required for JADU
As required by state law, all JADUs are subject to an owner-occupancy requirement.
From the ordinance
One off-street parking space on a paved surface served by a paved driveway is required for each ADU. The parking space may be provided in setback areas or as tandem parking...
Parking requirements
{
"ADU": "1 space per ADU, may be in setback or tandem, unless exceptions apply"
}