Seattle, WA Building Setbacks & Zoning: Structure Height Limits (2026)
Key Facts
- Base height limit
- 32 feet in Neighborhood Residential zones
- Bonus height
- 42 feet for 3+ units with 20-ft front setback
- Accessory structure limit
- 12 feet in required setbacks
- Pitched roof bonus
- Up to 5 feet above limit at 4:12 pitch
- Governing section
- SMC 23.44.070
Summary
SMC 23.44.070 caps most structures in Seattle's Neighborhood Residential zones at 32 feet, rising to 42 feet for developments with three or more units and a 20-foot front setback, or for qualifying stacked units. Accessory structures in required setbacks are capped at 12 feet, with a 3-foot pitched-roof allowance.
A.Maximum height established1.Subject to the exceptions allowed in this Section 23.44.070, the height limit is 32 feet for any structure not listed in subsections 23.44.070.A.2 or 23.44.070.A.3;2.The height limit is 42 for the following types of development:a.Any development with three or more principal dwelling units and a front setback of at least 20 feet;... 3.The height limit for accessory structures that are located in required setbacks is 12 feet, except as follows:a.The ridge of a pitched roof may extend up to 3 feet above the 12-foot height limit provided that all parts of the roof above the height limit shall be pitched at a rate of not less than 4:12. No portion of a shed roof is permitted to extend beyond the 12-foot height limit.
Official source re-checked September 7, 2026: no newer edition of the code had been published (publisher’s edition: Municipal Code: Supplement 44 Update 1).
Full Breakdown
070(A)(1) sets the default height limit at 32 feet for any structure in a Neighborhood Residential zone not otherwise listed. 120 delivering at least ten percent canopy coverage at maturity. 3, though a pitched roof ridge may rise up to 3 feet above that limit if pitched at least 4:12 (shed roofs get no extra height). Subsection B allows the main roof of any structure to add up to 5 feet of ridge height above the applicable limit for a pitched roof of at least 4:12, or up to 3 feet on the high side of a shed or butterfly roof, with eave extensions capped at 4 feet above the limit. 64 if set back at least 50 percent of their height from any lot line.
Violations & Fines
A structure built above 32 feet in a Neighborhood Residential zone without qualifying for the 42-foot bonus, or an accessory structure over 12 feet in a required setback without a code-compliant pitched roof, is out of compliance with SMC 23.44.070 and SDCI will require the applicant to redesign, obtain a variance, or reduce the structure before issuing or finalizing a building permit.
Frequently Asked Questions
How tall can a house be in Seattle's residential zones?
When does the 42-foot height limit apply?
How tall can a backyard shed or garage be?
Sources & Official References
Other rules in Seattle
Compare Seattle to another location·View the Washington building setbacks & zoning overview
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Structure Height Limits in Nearby Cities
How other cities in King County handle structure height limits.