Go Far®ADU & DADU builder · Redmond
ADU & DADU builder for Redmond.
With one of the world’s largest tech campuses at its center, light rail running through downtown, and rental demand to match, Redmond is one of the Eastside’s best ADU markets — and its code has caught up: two accessory units on most residential lots, no owner-occupancy requirement, and no off-street parking minimum. Go Far Construction builds permitted, finished ADUs across Redmond: ground-up backyard cottages, basement apartments, garage conversions, and attached units, from a family-owned, licensed Washington general contractor.
Washington’s ADU law — HB 1337 — sets the statewide floor of two accessory units per lot, and Redmond’s code meets it on friendly terms: up to two ADUs on most residential lots, units up to 1,000 square feet (with room for more in specific cases, such as an ADU occupying a full floor of the main house), no requirement that the owner live on the property, and no off-street parking minimum. ADU impact fees are capped by state law at half of what a primary home pays. Our ADU vs. DADU guide walks through which route fits which lot — and we confirm the exact numbers for your parcel with the City of Redmond before design begins.
On budget: basement ADU conversions and garage conversions in this market generally land between $100,000 and $250,000 depending on the starting condition of the space, while a new-build detached cottage typically runs $250,000 to $450,000 including site work, utilities, and soft costs. The full math lives in our ADU cost guide and DADU cost guide — and few markets make the rental side pencil like Redmond, where the Microsoft campus, downtown’s light rail stations, and Marymoor Village keep small rentals in constant demand; ADU financing options covers how owners fund the build.
We build every route to a second unit: basement conversions, garage conversions, attached mother-in-law suites, and ground-up DADUs on the deep lots of Education Hill, Grass Lawn, and English Hill. Permits run through the City of Redmond — including the residential fire sprinklers Redmond requires in new ADUs, which we design in from the start — and we prepare the application, carry fees in an itemized written price, and meet every inspector on site, as on all our Redmond projects.
What we build in Redmond
Redmond ADU questions
How much does it cost to build an ADU in Redmond?
Basement ADU conversions and garage conversions generally land in the $100,000–$250,000 range depending on the starting condition of the space. A new-build detached ADU (backyard cottage) typically runs $250,000–$450,000 including construction, site work, utility connections, and soft costs. Every project gets an itemized written estimate before design is finalized.
How many ADUs does Redmond allow on a lot?
Up to two on most residential lots, in line with Washington’s statewide ADU law, HB 1337. Exactly what fits on your parcel still depends on zoning, lot coverage, setbacks, and trees or critical areas, so we confirm the numbers with the City of Redmond before design begins.
Do I have to live on the property or add parking for a Redmond ADU?
No on both counts — Redmond has no owner-occupancy requirement for ADUs and requires no off-street parking spaces for one. If you plan to rent the unit for stays under 30 nights, the city requires a short-term-rental business license.
Does a new ADU in Redmond need fire sprinklers?
Yes — Redmond requires residential fire sprinklers in new attached and detached ADUs. It’s a real line item, so we scope the sprinkler system during design and carry it in the itemized estimate rather than letting it surprise the budget later.
Plan your project
Costs, rules, and timelines for Redmond ADU projects: ADU costs · DADU costs · Washington’s ADU law · ADU timelines · ADU financing · Kirkland ADUs · Bellevue ADUs · our Redmond page