Attached ADU — twin white barn doors on a black rail, kitchen and red entry door beyond, Orange, Avorino

ADU · Orange

Orange County, California

Attached ADU, Orange

Barn-Door Attached ADU

An attached ADU in Orange that reads as a seamless extension of the main house — shared wall, independent entrance, and a full kitchen and bath inside a footprint that preserved the backyard.

Same-week free consultation ADU cost + permits in Orange

18 photographs · Avorino · Lic. #110753837 Orange County cities & communities · B-#1107538Scroll to explore ↓

Scope of work

What this build involved.

Attached ADU sharing one wall with the main residence
Independent entrance + address-ready separation
Full kitchen and bath
Sound-isolation detailing at the shared wall
Roofline + exterior finish matched to the main house

The finished build

Finish and structural detail (12)

Select any photograph to see it full screen.

Attached ADU — kitchen run under the range hood, Orange, Avorino — 01Kitchen run under the range hood

Attached ADU, Orange, Avorino — 02Attached ADU

Attached ADU, Orange, Avorino — 03Attached ADU

Attached ADU, Orange, Avorino — 04Attached ADU

Attached ADU — bedroom with barn door, Orange, Avorino — 05Bedroom with barn door

Attached ADU — hall to the bath, Orange, Avorino — 06Hall to the bath

Attached ADU — kitchen with subway-tile backsplash and gray lowers, Orange, Avorino — 07Kitchen with subway-tile backsplash and gray lowers

Attached ADU — kitchen and the red entry door, Orange, Avorino — 08Kitchen and the red entry door

Attached ADU — living room with mirrored closet, Orange, Avorino — 09Living room with mirrored closet

Attached ADU — bedroom with three windows, Orange, Avorino — 10Bedroom with three windows

Attached ADU — bedroom, Orange, Avorino — 11Bedroom

Attached ADU — bedroom behind the barn door, Orange, Avorino — 12Bedroom behind the barn door

Project record

Barn-Door Attached ADU, by the numbers.

Permits & process

Orange applies design review in its historic quarters (Old Towne runs a dedicated review board), but standard residential lots follow the regular plan-check path. Matching the existing structure's exterior kept review friction low.

The build

Attached units trim the site-work bill — one shared wall, shorter utility runs — which is why they anchor the value end of the full-size ADU range.

ADU cost + permits in Orange

Finished area (approx.): 550 sq ft
Bedrooms (approx.): 1
Bathrooms (approx.): 1
Photographs in this set: 18

City: Orange, CA
Builder: Avorino · Lic. #1107538
Typical budget: $200K–$350K+ (attached ADU)
Typical timeline: 5–8+ months build, after design + permits
Warranty: 1-yr fit & finish · 4-yr systems · 10-yr structural
Stories: Single-story
Build: Attached

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

On site

Slab to framing.

During construction — from our Instagram story

01Slab rebar over the sand pad inside the forms
02First wall framing and header beam on the new slab
03Wall framing and roof rafters against the sky
04Sheathed wall with the framed window opening
05Framed hallway with double headers and ceiling joists

More work

Keep looking: the next project.

Previous project
Chef's-Kitchen Custom Home
Aliso Viejo, CAapprox. 3,500 sq ft
Next project
Bear Brand Whole-Home Remodel
Laguna Niguel, CAapprox. 3,200 sq ft

Next step

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