Detached ADU (Ground Up), Buena Park

A ground-up detached ADU in Buena Park, built for clean, durable interiors: open living, a full kitchen, and finish choices picked to rent well and wear slowly. One contract from drawings to final inspection.

Next step

Same-week free consultation ADU cost + permits in Buena Park

Project record

750

sq ft

approx.

City: Buena Park, 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: approx. 2 bed · 2 bath
Stories: Single-story
Build: Ground-up · Flat lot

Sizes and room counts marked approx. are estimates from plans and photos.

Scope of work

What this build involved.

Ground-up detached ADU on a flat inland lot
Open living + full kitchen with stainless package
Durable, rental-ready finish selections
Independent utility runs + panel work
City inspections through final sign-off

Permits & process

Buena Park follows the standard inland OC plan-check path (typically 4–6+ weeks) with no hillside or coastal overlays on most residential lots — one of the county's more predictable permitting environments.

The build

Flat-pad inland lots keep foundations and utility runs straightforward, which is why inland detached builds anchor the lower half of the county's cost range.

Plates

Finish + structural detail.

23 finished frames

Detached ADU — ground-up build, Buena Park, Avorino — Ground-up build

Detached ADU — ground-up build, front elevation, Buena Park, Avorino — Ground-up build, front elevation

Detached ADU — open living and kitchen, Buena Park, Avorino — Open living and kitchen

Detached ADU — living room toward the kitchen, Buena Park, Avorino — Living room toward the kitchen

Detached ADU — living room and hall to the bath, Buena Park, Avorino — Living room and hall to the bath

Detached ADU — white shaker kitchen with quartz counters, Buena Park, Avorino — White shaker kitchen with quartz counters

Detached ADU — kitchen corner with range and window, Buena Park, Avorino — Kitchen corner with range and window

Detached ADU — bedroom with closet and window, Buena Park, Avorino — Bedroom with closet and window

Detached ADU — hallway and closets, Buena Park, Avorino — Hallway and closets

Detached ADU — main living room with the hall to the bath, Buena Park, Avorino — Main living room with the hall to the bath

Detached ADU — living room, entry door and front windows, Buena Park, Avorino — Living room, entry door and front windows

Detached ADU — kitchen run with white shaker cabinets and stainless range, Buena Park, Avorino — Kitchen run with white shaker cabinets and stainless range

Detached ADU — range wall with white uppers and hood, Buena Park, Avorino — Range wall with white uppers and hood

Detached ADU — bath with marble-look shower and gold fixtures, Buena Park, Avorino — Bath with marble-look shower and gold fixtures

Detached ADU — shower niche in marble-look tile, Buena Park, Avorino — Shower niche in marble-look tile

Detached ADU — stacked laundry closet off the hall, Buena Park, Avorino — Stacked laundry closet off the hall

Detached ADU — bedroom, Buena Park, Avorino — Bedroom

Detached ADU — bedroom with the en-suite door, Buena Park, Avorino — Bedroom with the en-suite door

Detached ADU — second bedroom, Buena Park, Avorino — Second bedroom

Similar projects.

Full portfolio

What clients say about this kind of build

“These are the best people in the business. I used Avorino to build my own ADU. They beat every single price I got and did an excellent job finishing it in no time. Truly the best of the best — highly recommended.”

Shahin S. · Detached ADU · Orange County

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