Sidney 4 — 400 sq ft Prefab ADU

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

Sidney 4 floor plan — 400 sq ft, 1 bed, 1 bath prefab ADU

Sidney 4 floor plan · overall footprint 35'-1" × 11'-5"

Starting at

$194,500

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

Size
400 sq ft
Bedrooms
1
Bathrooms
1
Footprint
35'-1" × 11'-5"
Certification
CSA A277
Build to delivery
From 12 weeks
Build Yours

Free 30-minute consultation first — we talk through whether the plan fits your lot before you commit to anything.

400 sq ft in a long, narrow 35 × 11 footprint — the plan to use when your buildable area is a strip along a side yard. Bedroom at one end, living area in the middle, kitchen and full bathroom at the other end.

  • Prefabricated, move-in ready
  • The perfect short term rental unit with small kitchen
  • Open and spacious
  • Sustainably built, using CLT (cross-laminated timber)
  • Thoughtfully designed space
  • Three glass slider doors 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.

Free 30-minute consultation

Talk through your property.

The consultation is free and takes 30 minutes. Loren, who runs your build from the first call through inspection, calls you the same day. Site visits and permitting are paid work.

No payment to talk. Call now, or send the details and we call you.

(360) 594-0120 Book a call