ADU model · Transitional farmhouse
3 Bed ADU 1100
1,100 sq ft · 3 bed · 2 bath
A full three-bedroom home, with a primary suite set apart from the kids’ rooms and a dining table for six.
Good for: A growing family, several generations under one roof, or a larger rental.
Typically $402k - $517k design to move-in, plus city permit and PG&E fees
- Size
- 1,100 sq ft
- Bedrooms
- 3
- Bathrooms
- 2
- Footprint
- 27.5 × 40 ft
- Typical timeline
- Under a year
The layout
What’s inside
The primary suite sits behind its own wall. The great room in the center opens through an 8-ft sliding door and has dining for 6. Two bedrooms, the hall bathroom and laundry are in the other wing.
Primary suite with its own bathroom
Great room with 8-ft sliding door
Dining for 6
Two more bedrooms
Hall bathroom and laundry
Outside: blue-gray lap siding and a white gable porch.
Make it yours
A starting point, not a catalog
Starting from a model saves time on the drawings. We draw the final plans for your lot, then take them through your city’s permits. Along the way you can change:
Finishes: our standard package, or custom finishes chosen with you
Outside: siding, colors, roof and windows
Layout: room sizes, walls, doors and the kitchen
Size: larger or smaller to fit your lot
What it typically costs
$402k - $517k
For 1,100 sq ft at $365 - $470 per sq ft. That includes design, engineering, permits, construction and a finish allowance of about $20,000.
Not included: city permit fees, PG&E connection fees, and extra inspections some cities require from outside inspectors. Your exact number comes after we see your property, and it is locked in your contract.
Images are 3D renderings of the base designs. Final plans are drawn for your lot after the site visit.
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Like the 3 Bed ADU 1100? See if it fits on your lot.
We review every request within 1 business day. If it’s a project we take on, we call you to talk through your lot, your city’s rules and a rough budget. There’s no cost to find out.
Or call (510) 453-0400, Monday to Friday, 9am to 5pm.


