Can I build a backyard home in Enumclaw?
Since 2023, Washington law lets most city lots hold up to two more homes. Enumclaw writes its own rules on top. Here’s what the code says, in plain English — and a free report on what may fit on your lot.
What Enumclaw allows.
The headline standards. Tap any one for the full wording and the code section.
ADUs per lot2 — 1 attached + 1 detached, 2 attached, or 2 detachedFull wording
2 — 1 attached + 1 detached, 2 attached, or 2 detached (EMC Chapter 19.34).
Max size1,000 sq ft gross floor area, max 2 bedroomsFull wording
1,000 sq ft gross floor area, max 2 bedrooms; gross floor area includes basements and attics but excludes a garage or accessory structure (EMC 19.34, formerly 19.34.090; definition EMC 19.34.030(G)). The administrator may allow up to 50% of the principal unit's livable floor area for an ADU on one floor of a multi-floor house.
Max height24 ft for an accessory structureFull wording
24 ft for an accessory structure (EMC 19.34, formerly 19.34.120).
Front setback20 ft in R-2 (same as the house)Full wording
Same as principal: 20 ft, R-2 Moderate Density Single-Family zone (EMC 19.34, formerly 19.34.120; R-2 standards as quoted in city decision LUA2025-0033).
Side setbackNot confirmed yet — ask the cityFull wording
Not confirmed yet — ask the city. (EMC 19.34 applies single-family setbacks but also points detached ADUs to each zone's accessory-building rules; the R-2 principal side yard is 9 feet per city decision LUA2025-0033)
Rear setbackNot confirmed yet — ask the city (0 ft at an alley)Full wording
Not confirmed yet — ask the city. (R-2 principal rear yard is 25 feet per city decision LUA2025-0033; detached accessory-building rear setback not read; a detached ADU may sit at a rear lot line abutting an alley, EMC 19.34, formerly 19.34.120)
Lot coverage40% maximum building coverage, R-2 zoneFull wording
40% maximum building coverage, R-2 zone (as quoted from EMC 18.06.040(A) in city decision LUA2025-0033).
Parking1 space per ADUFull wording
1 space per ADU (off-street stall) unless within ½ mile walking distance of a major transit stop (EMC 19.34, formerly 19.34.120).
Where a city figure reads stricter than the state floor (RCW 36.70A.681), the floor may control — the report flags it for your parcel.
Living there, selling it, plans, time and fees.
Each answer is the code’s own wording, with the section it comes from. “Not published yet” means the city hasn’t posted a figure — the report asks the city, not the internet.
Are backyard homes allowed?
Yes — up to two ADUs subordinate to a new or existing residential use, on lots of any size; detached ADUs follow each residential zone's detached accessory building provisions (EMC Chapter 19.34).
Minimum lot size
None — ADUs may be developed on lots of any size (EMC Chapter 19.34); zone minimum applies to new lots.
Do you have to live there?
No — EMC Chapter 19.34 contains no owner-occupancy requirement (Ord. 2758, 2023).
Can it be sold on its own?
ADU land may not be subdivided from the principal unit's lot (EMC 19.34, formerly 19.34.080); condominium sale not addressed — RCW 36.70A.681 floor applies.
Pre-approved plans
None found
How long the city takes
Not published
Impact fees
Impact fees assessed at 50% of the single-family fees (EMC 19.34, formerly 19.34.150).
Plans Enumclaw has already approved.
A pre-approved plan skips the design review: Enumclaw has already checked the drawings, so the permit review is about your lot.
Loading the plans…
Pictures are the official pages’ own. A pre-approved plan is not a permit: the city still reviews your site.
The code is half the answer. Your parcel is the other half.
Lines and easements
Where the lot lines really are, which setbacks apply on each side, and whether a utility or access easement takes the corner you had in mind.
Critical areas and slope
Steep slopes, wetlands and streams come with buffers that no citywide number shows. The report reads the county’s maps for your parcel.
Sewer, septic, water, trees
Whether sewer reaches the lot or it’s on septic, where the water service is, and which trees a city protects — the things that decide where a unit can actually go.
What Enumclaw allows, what could fit on your lot, and a planning cost range. If something won’t fit, the report says so — and shows what might.
Where this page comes from.
Read from the Enumclaw municipal code and the city’s own pages on November 5, 2026. The same table feeds the HousUp report, so the report and this page never disagree. Cities amend their codes; before you design anything, confirm the current wording with the city.
2 sources, read November 5, 2026
Find out what your property could become.
Type your address. Within a few hours: what Enumclaw allows, what could fit, and a planning cost range. Free, no obligation.