Kent, WA Building Setbacks & Zoning: Lot Coverage Limits (2026)
Key Facts
- A-10 / NR-L zones
- 30% maximum site coverage
- NR-S zone
- 45% maximum site coverage
- NR-2 zone
- 50% maximum site coverage
- NR-3, NR-4A, NR-4B zones
- 55% maximum site coverage
- Mobile home parks
- 40% cap under KCC 12.05.190
- Administrative variance
- Up to 25% relief via planning director
- Interior yards
- Excluded from coverage calculation
Summary
Kent caps building and site coverage by zoning district under KCC 15.04.170(B): 30% in the A-10 agricultural and NR-L low-density zones, 45% in NR-S, 50% in NR-2, and 55% in NR-3, NR-4A and NR-4B. Interior yards do not count toward the total under KCC 15.04.180(5). Mobile home parks follow a separate 40% cap under KCC 12.05.190.
Zoning Districts A-10 NR-L NR-S NR-2 NR-3 NR-4A NR-4B MHP Mobile Home Park Combining
...
(B) Maximum site coverage: percent of site 30% 30% 45%
(5) 50%
(5) 55%
(5) 55%
(5) 55%
(5)
Official source re-checked September 8, 2026: no newer edition of the code had been published (publisher’s edition: current through Ordinance 4542, passed June 16, 2026).
Full Breakdown
170, with the number at the intersection setting the limit for that zone. Row (B), "Maximum site coverage: percent of site," sets the residential coverage ceiling: 30 percent in the A-10 agricultural zone and the NR-L low-density zone, 45 percent in NR-S, 50 percent in NR-2, and 55 percent in NR-3, NR-4A and NR-4B, each of the higher figures carrying footnote (5). 180(5), excludes interior yards from the site coverage calculation, so only the building footprint and other impervious features on the buildable portion of the lot count against the percentage.
190 caps coverage at 40 percent of any mobile home lot, counting the mobile home and enclosed accessory structures but excluding open carports. 01 KCC, and conditioned on the change not detracting from the neighborhood's character or threatening public health and safety. 042(D).
Violations & Fines
Exceeding the coverage cap without an approved plan is a Kent City Code violation under Chapter 1.04 KCC: each day the excess coverage remains constitutes a separate offense. A negligent violation is a misdemeanor punishable up to the maximum set in RCW 9A.20.021(3); a knowing or repeat violation is a gross misdemeanor under RCW 9A.20.021(2). The building official can also issue a stop work order under KCC 14.08.100 until the site plan is brought back within the zone's percentage limit.
Frequently Asked Questions
What is Kent's maximum lot coverage for a single-family home?
Does Kent's lot coverage limit include the whole yard?
Can a homeowner exceed Kent's lot coverage percentage?
Do mobile home parks in Kent follow the same coverage limit?
Sources & Official References
Other rules in Kent
Compare Kent to another location·View the Washington building setbacks & zoning overview
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Lot Coverage Limits in Nearby Cities
How other cities in King County handle lot coverage limits.