Renton, WA Building Setbacks & Zoning: Setback Rules (2026)
Key Facts
- Front yard, RC/R-1/R-4
- 30 ft.
- Front yard, R-8
- 20 ft. (15 ft. via alley access)
- Rear yard, RC
- 35 ft.
- Side yard, R-8
- 5 ft.
- Freeway frontage setback
- 10 ft. landscaped, all zones
Summary
Renton sets minimum front, rear and side yard setbacks by residential zone in RMC 4-2-110A, ranging from a 30-foot front yard in RC and R-1 down to 20 feet in R-8, with side yards as tight as 5 feet in R-8 and rear yards of 25 to 35 feet across the low and medium density zones.
Minimum Front Yard: 30 ft. [RC] / 30 ft. [R-1] / 30 ft. [R-4] / 25 ft. [R-6] / 20 ft. except when all vehicle access is taken from an alley, then 15 ft. [R-8]. Minimum Rear Yard: 35 ft. [RC] / 30 ft. [R-1] / 25 ft. [R-4] / 25 ft. [R-6] / 25 ft. [R-8]. Minimum Side Yard: 25 ft. [RC] / 15 ft. [R-1] / Combined 20 ft. with not less than 7.5 ft. on either side [R-4] / Combined 15 ft. with not less than 5 ft. on either side [R-6] / 5 ft. [R-8]. Minimum Freeway Frontage Setback: 10 ft. landscaped setback from the street property line.
Official source re-checked September 8, 2026: no newer edition of the code had been published (publisher’s edition: current through Ordinance 6197, passed August 10, 2026).
Full Breakdown
RMC 4-2-110A governs primary structures in the Resource Conservation (RC), Residential-1 (R-1), Residential-4 (R-4), Residential-6 (R-6) and Residential-8 (R-8) zones. Minimum front yard setbacks run 30 feet in RC, R-1 and R-4, dropping to 25 feet in R-6 and 20 feet in R-8 (15 feet where all vehicle access comes from an alley). Minimum rear yards are 35 feet in RC, 30 feet in R-1, 25 feet in R-4, R-6 and R-8 (also 25 feet where alley access applies). 5 feet per side in R-4, a combined 15 feet with not less than 5 feet per side in R-6, and a flat 5 feet in R-8.
Corner lots carry a secondary front yard setback matching the primary front yard figure for each zone (15 feet in R-8). Higher-density zones are addressed separately in RMC 4-2-110B: R-10 requires a 20-foot front yard (15 feet with alley access) and a 15-foot rear yard, while R-14 requires a 15-foot front yard (10 feet with alley access) and a 10-foot rear yard, with detached-unit side yards of 4 feet in both zones. A 10-foot landscaped setback from the street property line applies citywide along freeway frontage.
Pre-existing legal lots that predate current dimensional standards get an exception under RMC 4-10-010, Nonconforming Lots, rather than being forced to meet the current table.
Violations & Fines
Building or expanding a structure that encroaches into a required setback without an approved variance or exception is a zoning violation subject to Renton's code compliance process; the city can issue a stop-work order, require removal or relocation of the offending structure, and assess civil penalties that accrue daily until the violation is corrected.
Frequently Asked Questions
What is the minimum front yard setback in Renton's R-8 zone?
Are setbacks smaller in Renton's higher-density residential zones?
Do older Renton lots have to meet today's setback table?
Sources & Official References
Other rules in Renton
Compare Renton to another location·View the Washington building setbacks & zoning overview
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Setback Rules in Nearby Cities
How other cities in King County handle setback rules.