Guide · Kirkland · King County · Updated July 2026
How many units can you build in Kirkland?
If you own or are evaluating a residential lot in Kirkland, the first question is almost always the same: how many homes can legally go on it? Since Washington's HB 1110 middle-housing law took effect, the answer for most Kirkland lots is now more than one. Kirkland allows 4 units per lot by right, rising to 6 near frequent transit or citywide with two affordable units.
Kirkland at a glance: 4 units per lot by right, up to 6 with the city's bonus, plus up to 2 ADUs under HB 1337. Source: Kirkland Zoning Code Ch. 113 (Ord. O-4905).
What Kirkland's adopted code allows
Kirkland allows 4 units per lot by right, rising to 6 near frequent transit or citywide with two affordable units. The count follows a density formula; multiplexes over 4 units aren't permitted in low-density zones.
The details: 6 near major transit, or citywide with two affordable units. These are Kirkland's city-wide standards, per Kirkland Zoning Code Ch. 113 (Ord. O-4905); the exact figure for a specific parcel — its zone, lot size, transit proximity, and critical areas — is what a Civexa report resolves.
What actually fits: floor area, height, and setbacks
HB 1110 and the city code set the right to a number of units; the zone's building envelope sets what physically fits. Floor-area ratio, lot coverage, height, and setbacks together decide whether those homes pencil as detached cottages, a townhouse row, or a stacked-flat building. Civexa models Kirkland's base residential height at about 30 feet, which — with setbacks and floor-area limits — caps how many of those homes physically fit. Civexa computes this envelope for Kirkland zone by zone, so the unit count you see is one the zoning can actually hold.
What can shrink it: critical areas
Steep slopes, wetlands, streams, and flood zones can override the unit math on a specific parcel. A lot that qualifies for the maximum on paper may be constrained once environmentally critical areas are mapped. Civexa screens FEMA flood, slope, and county critical-area layers for every Kirkland address so you find this out before you make an offer, not after.
Get the exact number for your Kirkland parcel
The figures above are Kirkland's city-wide rules. The number that matters is the one for your address — its zone, lot size, transit proximity, and critical areas. Civexa turns that into a full feasibility report in about a minute: unit count, buildable envelope, a preliminary pro forma, utilities, and permit path.
Run a Kirkland feasibility report →
Frequently asked
How many units can I build on a residential lot in Kirkland?
Kirkland allows 4 units per lot by right, rising to 6 near frequent transit or citywide with two affordable units. That is per Kirkland Zoning Code Ch. 113 (Ord. O-4905). The exact number for a specific parcel still depends on its zone, lot size, transit proximity, and critical areas — run a Civexa report for the parcel-level figure.
Can I add ADUs on top of that in Kirkland?
Washington's HB 1337 allows up to two accessory dwelling units on a residential lot. In some cities they count toward the middle-housing total and in others they are separate — your Civexa report applies Kirkland's specific rule.
What unlocks the maximum in Kirkland?
6 near major transit, or citywide with two affordable units.