Home Additions

Home addition architects who deliver permit-ready plans

Match with licensed architects who design room additions, second stories and bump-outs — tying new structure cleanly into your existing home, all the way to a stamped set. Remote, hired directly, with clear pricing up front.

From $3,500
typical price range
3–4 wk
to stamped set
Home addition exterior photo
Second story
Second-story addition
Berkeley, CA · 640 sq ft added
Home addition exterior photo
Two-story
Two-story rear addition
Oakland, CA · 880 sq ft added
Home addition exterior photo
Rear addition
Rear great-room + pool wing
San Jose, CA · 620 sq ft added
Home addition exterior photo
Upper level
Upper-level + garage addition
Livermore, CA · 720 sq ft added

What a addition drawing set includes

An addition has to marry new framing, foundation and roofline to what is already there — and satisfy structural, energy and setback rules along the way. Architects who do additions constantly know how to keep the tie-in clean and the plan check smooth.

Existing & proposed plans
Structural coordination
Foundation & framing details
Title-24 energy compliance
Roof & exterior tie-in
Permit-ready stamped set
TYPICAL PRICE RANGE
$3,500 – $9,000
AffordableTypicalPremium
Scales with size & scope
Agreed with your architect up front
Pay by milestone as you approve work
Get my estimate →

How your addition gets built

1

Estimate

Answer a short questionnaire and get an itemized price instantly.

2

Match

Meet 2–3 architects pre-cleared on additions + your jurisdiction.

3

Design

Scope on a call, hire directly, and iterate on plans over chat and video.

4

Permit

Receive a stamped set and submit for permit — revisions supported.

Home addition projects from the network

Recent stamped sets delivered by architects on the platform.

01 / 04
Home addition photo
Second story
Second-story addition
Berkeley, CA · 640 sq ft added
Home addition photo
Two-story
Two-story rear addition
Oakland, CA · 880 sq ft added
Home addition photo
Rear addition
Rear great-room + pool wing
San Jose, CA · 620 sq ft added
Home addition photo
Upper level
Upper-level + garage addition
Livermore, CA · 720 sq ft added

Home addition FAQs

Ready to price your addition?

Free instant estimate. Matched with licensed architects in 48 hours.

Start my addition →