South Hill sits right above downtown and next to Western Washington University, and it has some of the best ADU ground in the city. The homes here mostly date from the 1910s through the 1930s, sitting on generous lots that climb the slope toward the campus, and a lot of them came with full basements and an old single-car garage. With WWU right there, the rental demand is steady, which is why so many South Hill projects are basement apartments and garage conversions aimed at students or a family suite.
The age of these homes is the whole story. A 1920s basement near Boulevard Park can become a real apartment, but it needs egress windows cut into the old foundation, a check on ceiling height, and serious moisture control so it does not feel damp by the second winter. The old garages tend to have undersized panels that cannot carry a kitchen and a heat pump. We handle all of that, run a free feasibility check first, and build to current energy code so the unit holds up and rents well.
ADU costs in South Hill depend on the type. A ground-up detached backyard cottage runs $250,000 to $400,000 or more, a garage conversion runs $80,000 to $150,000, and a basement apartment conversion runs $90,000 to $180,000. The drivers are size, finish level, site access, and how far we run utilities to the unit. We give you a line-item number after a free site visit, so you know exactly what your project costs before you commit.
Do you build ADUs in South Hill?
Yes. South Hill is one of our core service areas, and we build backyard cottages, garage conversions, in-law suites, and basement apartments here. We start every project with a free feasibility check against your lot size, setbacks, and the City of Bellingham rules, so you know what your lot allows before you spend anything on design.
Who handles the permit for an ADU in South Hill?
We do, start to finish. South Hill is inside Bellingham city limits, so your ADU runs through the City of Bellingham. We pull and manage the permit and the inspections. We assemble the full permit package, manage the review including answering reviewer comments, and carry it through to an approved permit, then handle the inspections during the build.
Ready for a free South Hill feasibility check?
Tell us about your lot and your goal. We'll reply within 15 minutes during business hours.