Duplex Construction

What This Service Involves

Duplex construction gives you two attached homes under one roofline, ideal for rental income or living in one unit while renting the other. We design the shared wall for proper fire rating and sound control so both households enjoy privacy and quiet. Western Washington zoning increasingly favors this kind of gentle density, and we handle the permitting to match. The finished duplex is a durable, code-compliant investment tailored to Puget Sound rental demand.

Benefits

Two income or living units on a single lot; Fire-rated, sound-controlled party wall for privacy; Design aligned with local density zoning; Strong rental appeal in the Puget Sound market; One efficient build for two complete homes

Our Process

1) Confirm zoning, lot capacity, and unit layouts; 2) Engineer the shared wall and secure permits; 3) Build the foundation, structure, and both units; 4) Finish interiors and complete inspections

What Affects the Cost

Combined square footage of both units; Party-wall fire and sound assemblies; Site development and separate utility services; Finish level in each unit; Local permit and impact fees

Best Time of Year

Framing both units during the dry summer months keeps the shared structure protected and the schedule tight.