Building Setbacks & Zoning in Tacoma, WA

If you live in Tacoma or are thinking about moving there, building setbacks & zoning are one of those things you probably won't think about until they affect you directly. Tacoma has 3 specific rules on the books covering different aspects of building setbacks & zoning, and some of them might surprise you.

Structure Height Limits

In Tacoma's R-4 and R-5 Multiple-Unit Dwelling Districts, main buildings are capped at 60 and 150 feet respectively, with accessory buildings limited to 15 feet under the zoning code.

Key details: R-4 main buildings: maximum 60 feet. R-5 main buildings: maximum 150 feet. Accessory buildings: maximum 15 feet. View-Sensitive overlay: adds further height limits.

A main building built above 60 feet in an R-4 district, above 150 feet in R-5, or an accessory structure above 15 feet, violates the zoning height limit and can be ordered reduced or removed by the City.

Lot Coverage Limits

Tacoma caps total building coverage at 65% of lot area in its R-4 and R-5 multi-unit districts; single-family UR-zoned lots use floor-area-ratio limits instead.

Key details: Coverage cap (R-4/R-5): 65% of lot area. Corner lot bonus: +10% of lot area. Alley credit: 50% of abutting alley area. UR-1/2/3 districts: No coverage %; FAR-based instead.

Building over the 65% coverage cap without approval is a zoning code violation, enforced by the Planning and Development Services Department; noncompliant construction can be denied a certificate of occupancy or ordered corrected.

Setback Rules

Tacoma's Urban Residential zones set minimum yard setbacks in TMC § 13.06.020F.1: a 15-foot front and rear setback in UR-1, dropping to 10 feet in UR-2 and UR-3, with a 5-foot side setback that grows to 8 feet where a unit's entrance faces that yard.

Key details: UR-1 front & rear setback: 15 feet. UR-2 & UR-3 front & rear setback: 10 feet. Side setback: 5 ft (8 ft if entrance faces yard). Governing section: TMC § 13.06.020F.1. Bonus program: can reduce setbacks further.

Building outside the required setback line violates Title 13 and is declared a public nuisance under TMC § 13.05.150; Code Enforcement can order removal or correction, backed by penalties under the Uniform Enforcement Code, TMC Chapter 1.82.

The Bottom Line

Tacoma's building setbacks & zoning rules are a mixed bag. Some areas are strict, others are relaxed, and the details matter. The best approach is to check the specific rule that applies to your situation rather than assuming Tacoma is broadly strict or permissive.

All of the above reflects Tacoma's municipal code as of our last review. If you need specifics on fines, exemptions, or filing requirements, the detailed ordinance pages linked above have the full breakdown.