DADU Construction in Des Moines, WA

Most single-family lots in Bonney Lake are eligible for a DADU under Washington's HB 1337, which requires the city to allow at least one detached unit per residential lot. A site assessment checks your specific setbacks, lot coverage, and utility access before any design work begins.

Lot coverage limits in Bonney Lake vary by zoning district and include all structures on the property, not just the DADU. We calculate your lot's coverage allowance during the site assessment so you know exactly how much building area is available before plans are drawn.

A detached DADU gives you a fully independent structure with its own footprint, while a garage conversion repurposes existing square footage but eliminates covered parking. Under HB 1337, Bonney Lake must allow garage conversions even when the structure falls outside current setbacks, so both options are worth evaluating against your lot and how you plan to use the space.

Before finalizing any design, a site assessment should confirm your zoning district, available lot coverage, rear and side setbacks, slope or drainage concerns, and where water, sewer, and power connections are located. Identifying these factors early prevents design changes after permit submittal.

Yes, Bonney Lake's ADU rules under HB 1337 do not require the property owner to live on-site, so long-term rental of a DADU is permitted. If you plan to use the unit as a short-term rental, owner-occupancy requirements may apply, so confirm current city rules with the Bonney Lake Permit Center before finalizing your plans.

Yes, we build DADUs in Federal Way, Seattle, Shoreline, Normandy Park, Sammamish, Magnolia, Issaquah, Redmond, and Des Moines, Washington, in addition to Bonney Lake.