Accessory Structures in Redmond, WA (2026)
5 verified accessory structures rules for Redmond, Washington, sourced directly from the municipal code and official government pages.
Verified from official government sources
ADU Rules
Redmond allows one attached and one detached ADU per single-family lot under RMC 21.08 and WA HB 1337, with no owner-occupancy requirement and streamlined permitting for units up to 1,000 sq ft.
Redmond ADU Rules
Few RestrictionsShed Rules
Sheds 200 sq ft or smaller are exempt from building permits in Redmond per IRC R105.2 and must meet RMC 21.08 setback and lot coverage rules; larger sheds require building permits.
Redmond Shed Rules
Few RestrictionsGarage Conversions
Converting a garage to living space in Redmond requires a building permit and often qualifies as an attached ADU under RMC 21.08; parking replacement, egress, and energy code compliance are required.
Redmond Garage Conversion Rules
Some RestrictionsCarport Rules
Carports in Redmond must meet setback and lot coverage rules under RMC 21.08, typically require a building permit for permanent roofed structures, and generally cannot encroach into required front yard setbacks.
Redmond Carport Rules
Few RestrictionsTiny Homes
Tiny homes on permanent foundations may be allowed as ADUs under RMC 21.08 if they meet IRC Appendix Q standards; tiny homes on wheels (RVs) are limited to temporary use under RMC parking rules.
Redmond Tiny Home Rules
Some RestrictionsLooking for King County county-wide rules?
County ordinances apply to unincorporated areas and may supplement Redmond city rules.
Accessory Structures in King County →