ADU · Santa Ana Hills
Two-Story Detached ADU, Santa Ana Hills
A two-storey detached ADU in Santa Ana Hills — the answer when the lot is tight but the program isn't. Stacking the footprint doubled the living space on a fraction of the yard, with a pool-side rear elevation that reads like a small custom home.
Project record
1,000
sq ft
- City
- Santa Ana Hills, CA
- Builder
- Avorino · Lic. #1107538
- Typical budget
- $245K–$440K+ (detached ADU)
- Typical timeline
- 5–8+ months build, after design + permits
- Warranty
- 1-yr fit & finish · 4-yr systems · 10-yr structural
- Layout
- 2 bed · 2 bath
- Stories
- Two-story
- Build
- Ground-up
Scope of work
What this build involved.
- Two-storey detached ADU — stacked floor plan on a compact footprint
- Structural engineering for the second storey
- Full kitchen + living level, bedrooms above
- Pool-side rear elevation with full-height glazing
- Independent utilities + Title 24 compliance
Permits & process
Two-storey ADUs trigger height and privacy review in most OC cities; Santa Ana's standard plan check handled it without variance. Avorino carried the structural calc package and correction cycles in-house.
The build
Second-storey ADUs demand real structural engineering and tighter inspection sequencing than single-level units — the payoff is nearly double the rentable square footage on the same lot coverage.
Plates
Finish + structural detail.
25 finished frames
What clients say about this kind of build
“My parents are getting older and I wanted them close by, so I reached out to several contractors. Avorino really impressed me — extremely professional, timely, and clear communication throughout. My parents were so happy with how their space turned out.”
Next step
Want a written estimate for your Santa Ana Hills project?
We review your project personally and follow up as soon as possible. Same-week consultation, written timeline, calibrated to Santa Ana’s permit reality.