Attached ADU
Attached ADU
Add a self-contained unit onto the home you already have.
Side additions · Rear additions · Junior ADUs · Separate entrances
An attached ADU shares one wall with your house but nothing else — separate entrance, separate kitchen, separate bathroom. It suits narrow lots and yards you do not want to give up.
Because the new unit ties into existing foundations and utilities, an attached build is often quicker and less expensive than a detached one.
Why homeowners choose us for this
Keeps your yard
The unit extends the house instead of filling the garden.
Shorter utility runs
Water, sewer and power are already at the wall.
Lower cost per square foot
Around $220 per square foot in most of our service area.
Flexible over time
Open the connecting door later and it becomes part of the main house.
ADU cost estimator
See your number before you call
Set your size and type. Nothing to fill in, no email required.
Type
Estimated project cost
Rates being confirmed
We are updating our per-square-foot rates for 700 sq ft detached adu builds. Ask for the current figure and we will give it to you in writing after the free feasibility review.
Recent work
Remodel projects
Questions
Attached ADU FAQs
Ready for your free ADU feasibility review?
Tell us about your lot and your plans. You will get a realistic cost range, a timeline, and a straight answer about what your city allows — at no cost.