Previous project
ADU · Brea
Orange County, CaliforniaGarage Conversion ADU, Brea
Brea Garage-to-ADU Conversion
A Brea garage conversion ADU: an under-used two-car garage turned into a bright, open-plan studio-style unit with a full kitchen — the fastest, most budget-friendly path to a legal rental unit in Orange County.
23 photographs · Avorino · Lic. #110753837 Orange County cities & communities · B-#1107538Scroll to explore ↓
Scope of work
What this build involved.
- Two-car garage converted to a legal ADU
- Full kitchen with island seating + open living
- Insulation, drywall, and egress brought to habitable code
- Electrical panel work + dedicated circuits
- Exterior door + window package for light and egress
The finished build
Finish and structural detail (14)
Select any photograph to see it full screen.
Project record
Brea Garage-to-ADU Conversion, by the numbers.
Permits & process
Garage conversions skip foundation and framing review, so Brea's plan check runs lean — the work is proving habitability: insulation, egress, ventilation, and electrical capacity. State ADU law protects the conversion right even where HOAs object.
The build
Conversions are the value play: the shell exists, so budget goes into what you touch daily — kitchen, bath, light, and sound insulation from the main house.
- Finished area (approx.)
- 400 sq ft
- Plan (approx.)
- Studio
- Bathrooms (approx.)
- 1
- Photographs in this set
- 23
- City
- Brea, CA
- Builder
- Avorino · Lic. #1107538
- Typical budget
- $85K–$170K+ (garage conversion)
- Typical timeline
- 4–6+ months build, after design + permits
- Warranty
- 1-yr fit & finish · 4-yr systems · 10-yr structural
- Stories
- Single-story
- Build
- Conversion
Sizes and room counts marked approx. are estimates from plans and photos.
On site
From garage to ADU.
During construction — from our Instagram story
01The original garage before conversion, exposed rafters and old shelving 02Rebar over the vapor barrier inside the stripped garage shell 03The new slab being poured 04Garage opening stripped to studs with new sheathing 05Bathroom partition framing with drain and supply rough-ins 06Insulation in and the first drywall sheets up 07Shower tile set before grout, black-trim niche 08White shaker cabinets installed, protection tape still on
What clients say about this kind of build
“They converted our one-car garage into a Junior ADU. The city was difficult to work with, and Avorino took care of everything with them. Six months after finishing, there are no issues at all. Their cost was very competitive.”
More work
Keep looking: the next project.
Next step
Want a written estimate for your Brea project?
We review your project personally and follow up as soon as possible. Same-week consultation, written timeline, calibrated to Brea's permit reality.
AVORINO / SPATIAL STUDIESFIG. 01
Planning study · a conversation, not a committed designConcept only · cutaway walls lowered to reveal the layout
- 01Project
- 02Plans
- 03Context
- 04Contact