A newer planned development on the east side with larger lots, where new detached ADUs and prefab cottage setups are the typical projects on this newer stock.
Barkley is one of Bellingham's newer planned developments, built up over the last few decades on the east side near Barkley Village. The homes are newer, the lots tend to be larger and more level than the tight grids downtown, and there are no old garages with vapor-barrier problems to deal with. That makes Barkley a clean fit for ground-up detached ADUs, a new backyard cottage designed from scratch, and for prefab or modular cottage setups where we do the site prep, foundation, and utility hookups for a factory-built unit.
On newer, level lots the build is more straightforward, but the rules still drive it. We check your lot coverage and setbacks against the 2025 two-ADU rules, plan the utility runs from the house to the new cottage, and set a foundation for our wet ground with drainage handled. A detached unit out here gets insulated and sealed to current energy code from day one. We start every Barkley project with a free feasibility check so you know exactly what your lot allows before design.
ADU costs in Barkley 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 Barkley?
Yes. Barkley 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 Barkley?
We do, start to finish. Barkley is inside Bellingham city limits, so your new detached ADU runs through the City of Bellingham. We handle the permit and the site work. 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 Barkley feasibility check?
Tell us about your lot and your goal. We'll reply within 15 minutes during business hours.