Go Far®ADU & DADU builder · Shoreline
ADU & DADU builder for Shoreline.
Light rail changed Shoreline’s math: two stations opened in 2024, the city rewrote its development code in January 2025 to welcome second units, and the mid-century ramblers on Shoreline’s generous lots are exactly the housing stock ADUs were made for. Go Far Construction builds permitted, finished ADUs across Shoreline: ground-up backyard cottages, basement apartments, garage conversions, and attached units, from a family-owned, licensed Washington general contractor based ten minutes north in Lynnwood.
Washington’s ADU law — HB 1337 — requires cities to allow two accessory units per lot and bars owner-occupancy requirements, and Shoreline brought its development code in line in January 2025, alongside the middle-housing changes in its new comprehensive plan. Near the Shoreline South/148th and Shoreline North/185th light-rail stations, state law also bars the city from requiring off-street parking for an ADU within a half-mile walk of the station. Our ADU vs. DADU guide walks through which route fits which lot.
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 a ten-minute walk to light rail is precisely the amenity that keeps a small rental occupied; ADU financing options covers how owners fund the build.
We build every route to a second unit: daylight-basement conversions under Richmond Beach, Echo Lake, and Ridgecrest ramblers, garage conversions, attached mother-in-law suites, and ground-up DADUs shaped to the lot. Permits run through the City of Shoreline; we prepare the application, settle sprinkler and critical-area questions at feasibility, carry fees in an itemized written price, and meet every inspector on site, as on all our Shoreline projects.
What we build in Shoreline
Shoreline ADU questions
How much does it cost to build an ADU in Shoreline?
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 Shoreline allow on a lot?
Two accessory units per lot. Shoreline rewrote its development code in January 2025 to carry out Washington’s statewide ADU law, HB 1337, which requires two ADUs per lot in urban growth areas and bars cities from imposing owner-occupancy requirements. What fits on your parcel still depends on zoning, coverage, setbacks, and any critical areas, so we confirm the numbers with the City of Shoreline before design begins.
Does an ADU in Shoreline need off-street parking?
Often not. Under HB 1337, cities may not require off-street parking for an ADU within a half-mile walk of a major transit stop — and with the Shoreline South/148th and Shoreline North/185th light-rail stations open, that covers a meaningful share of the city. Outside those areas requirements are modest, and we check your parcel’s exact situation at feasibility.
Why are so many Shoreline homeowners building ADUs now?
Three things lined up: light rail opened in 2024 and made car-free renting practical, the January 2025 code update cleared the regulatory path to two units per lot with no owner-occupancy requirement, and Shoreline’s lot stock — mid-century ramblers on generous lots, many with daylight basements — is well suited to conversions and backyard cottages alike.
Plan your project
Costs, rules, and timelines for Shoreline ADU projects: ADU costs · DADU costs · Washington’s ADU law · ADU timelines · ADU financing · Seattle ADUs · Edmonds ADUs · Lynnwood ADUs · our Shoreline page