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
Seattle Municipal Code 23.44.070(A)(1) sets the default height limit at 32 feet for any structure in a Neighborhood Residential zone not otherwise listed. Subsection A.2 raises that to 42 feet for four categories of development: any project with three or more principal dwelling units paired with a front setback of at least 20 feet; stacked dwelling units meeting the standards in subsection 23.44.050.D; stacked units on lots scoring 0.6 or higher on the Green Factor under Section 23.86.019; and structures on lots that retain a Tier 1 or Tier 2 tree under Section 25.11.130 or that earn a tree point score under Section 23.44.120 delivering at least ten percent canopy coverage at maturity.
Accessory structures located within required setbacks are limited separately to 12 feet under subsection A.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.
Freestanding flagpoles and religious symbols at religious institutions are exempt from height controls under Chapter 23.64 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
See something wrong?
Help us keep this page accurate. If you notice an error or outdated information, let us know.
Structure Height Limits in Nearby Cities
How other cities in King County handle structure height limits.