Builders who publish the rulebook.

Prism General Contractors designs, permits and builds ADUs across Puget Sound. We put the rules and the cost model online because a homeowner who understands the project makes better decisions — and a better client.

FOUNDED: [YEAR]
ADUS BUILT: [NUMBER]
SERVICE AREA: Everett to Tacoma
WA LICENSE: [NUMBER]

01WHAT WE DO

Design Site survey, layout and drawings sized to your city’s limits — or a pre-approved plan adapted to your lot.

Permit Submittal, corrections and utility permits, handled end to end with the city and utilities.

Build Foundation to final inspection with one crew lead, one schedule and one contract.

02HOW WE WORK

01Rules before renderingsWe confirm what your lot allows before anyone draws a floor plan, so nothing gets redesigned at the permit counter.
02Itemized, not lump-sumEvery estimate breaks out construction, utilities, design and fees — the same lines as our public calculator.
03One team, survey to finalDesign, permitting and construction under one roof, so questions don’t bounce between firms.