Douglas 4 — 430 sq ft Prefab ADU

430 sq ft · 1 bedroom · 1 bath · CSA A277 certified · delivered and installed in Whatcom, Skagit, and Island counties

Douglas 4 floor plan — 430 sq ft, 1 bed, 1 bath prefab ADU

Douglas 4 floor plan · overall footprint 20'-1" × 21'-5"

Starting at

$192,000

Delivered unit, USD. Site prep, permitting, foundation, utilities, crane, and install are quoted separately.

Size
430 sq ft
Bedrooms
1
Bathrooms
1
Footprint
20'-1" × 21'-5"
Certification
CSA A277
Build to delivery
From 12 weeks
Build Yours

Free feasibility study first — we confirm the plan fits your lot before you commit to anything.

430 sq ft arranged as a near-square: a combined bedroom and living space with closets on both sides, a separate kitchen, a full bath, and a mechanical room. The most compact plan that still gives you a private, closed kitchen.

  • Prefabricated, move-in ready
  • Separate kitchen, bedroom/living room
  • Open and spacious
  • Sustainably built, using CLT (cross-laminated timber)
  • Thoughtfully designed space
  • Two glass slider doors and large window allowing for lots of beautiful natural light

Why Factory-Built

Affordable

A prefabricated, efficient build process needs less time and less labour on site, and that shows up in the price.

Sustainable

Clean construction methods and renewable materials from local, sustainably managed forests — including a cross-laminated timber floor plate.

Customizable

Every unit is expandable and modular, with interior and exterior options you pick during design.

Prefabricated

Built indoors in a controlled environment, so weather and the usual site delays never touch the structure.

Turnkey

We handle everything: feasibility, permitting, design, factory order, site prep, foundation, utilities, and install.

Timeline

From order to delivery can take as little as 12 weeks, with site prep running in parallel.

CSA A277 Certified

Every unit is CSA A277 certified, factory-inspected to the same code standard as site-built construction.

Canadian Made

Handcrafted in the Fraser Valley, British Columbia — a two-hour drive from Bellingham.

Fastest Way to a Walkthrough

Want Us Out to Walk Your Property?

The fastest way to get our team on-site is the free feasibility study. Loren, who runs your build and permitting, gets your details by text the second you submit.

Book Free Walkthrough

Prefer to call first? (360) 594-0120 — the form is faster.

Call Book Free Walkthrough