Bellevue, WA Building Setbacks & Zoning: Structure Height Limits (2026)

Building height in Bellevue varies sharply by zoning district under LUC 20.20.010. Single-family zones R-1 through R-5 generally allow principal structures up to 30 feet measured from average grade; steeper roofs (over 6:12 pitch) can gain up to 5 additional feet to the ridge. R-7.5 and small-lot zones adopted under Middle Housing reforms may allow slightly taller heights to fit modern roof forms. Accessory structures such as detached garages, sheds, and ADUs are typically limited to 15 feet for flat roofs or 18 to 24 feet for pitched roofs, depending on the zone. Downtown and mixed-use districts (Downtown Core, BelRed, Eastgate) have much higher limits set by design guidelines, sometimes exceeding 400 feet in the tallest sub-districts. Critical areas and shoreline overlays can reduce allowed height, and view-corridor protections in specific neighborhoods impose extra limits. Rooftop equipment and parapets are measured separately with defined exceptions up to a few feet. Height is enforced through building permit review; noncompliant additions can require removal or redesign. For complex lots with slopes, a surveyor should calculate average grade to confirm eligible height.