ADU · Santa Ana
Two-Story Detached ADU, Santa Ana
A two-storey detached ADU in Santa Ana — 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.
- ProjectTwo-Story Detached ADU
- CitySanta Ana, CA
- BuilderAvorino · Lic. #1107538
- Typical budget$245K–$440K+ (detached ADU)
- Typical timeline5–8+ months build, after design + permits
- Warranty1-yr fit & finish · 4-yr systems · 10-yr structural
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
Gallery
Finish + structural detail.
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.
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
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