Eugene, Oregon
Oregon state law requires Eugene to allow ADUs in single-family residential zones, and the university rental market keeps demand for small units steady.
$140K–$200K
All-in build cost
construction, design, permits & fees
$1,500–$1,800
Monthly rent
one-bed comps nearby
2–4 mo
Permit timeline
typical city review window
up to 800 sq ft
Typical max size
detached new construction
Estimates from regional cost and rental data — not a quote or a permit decision.
For Eugene ADU builders
Every homeowner searching "ADU cost in Eugene" ends up on a page like this. Our early-access widget will give them the answer for their exact address on your site — and send you the lead. Founding builders get it first.
FAQ
Most detached ADU projects in Eugene land between $140,000 and $200,000 all-in — construction, design, permits and fees. Garage conversions come in lower; high-end finishes and difficult lots push higher. These are estimates from regional cost data, not a quote.
Local comps put a new one-bedroom ADU in Eugene at roughly $1,500–$1,800 per month, depending on neighborhood, size and finish.
Permit review in Eugene typically runs 2–4 months, plus design time before you submit. Oregon state law requires cities to allow ADUs in residential zones, which keeps review predictable.
Oregon state law requires Eugene to allow ADUs in single-family residential zones, and the university rental market keeps demand for small units steady. The fastest way to find out for a specific address is a feasibility check against the city's zoning data — that's exactly what our early-access widget will do on builders' websites.