ADU California Inc.Steel-Framed Backyard Homes
ADU ModelsProcessServicesPortfolioFinancingCity Guides
More
Backyard BuildingsStorage, workshop and garden concepts.Why SteelHow the framing and wall system work.Cost CalculatorBuild a preliminary project range.Regions & City GuidesExplore Northern California, Central Valley and Southern California.Knowledge CenterCosts, permits, models, systems and planning guides.ContactReach the ADU California Inc. team.
(650) 400-7606Check my property
White contemporary ADU concept with an oak soffit and backyard terrace in natural daylight

ADU models

Find the Right ADU
for Your Property

Explore thoughtfully designed ADU models built for California.
Modern. Efficient. Built with steel.

Check my property See how it worksOur design & build process

A smarter
way to more space.⤵

Coordinated build processPrecision steel framingDesign & permit supportProperty-specific planning
California backyard livingArchitectural concept · daylight view

Browse our ADU models

Browse by size, bedrooms,
project type, or city.

Find the perfect ADU for your property or check your address to see what’s possible.

Not sure which model fits?

Enter your property address to explore preliminary options for your lot.

Check my property

By size

400 sq ft500 sq ft600 sq ft750 sq ft800 sq ft1,000 sq ft1,200 sq ft

By bedrooms

1 bedroom2 bedrooms3 bedrooms

By project type

Detached ADUsAttached ADUsGarage conversionsJADUs

Priority city guides

San JoseSanta ClaraCupertinoSunnyvaleMilpitasPalo AltoMountain ViewWalnut CreekFremontSacramento
View all California cities

Featured ADU models

Popular ADU Models

View all models

Compare our six defined ADU models, each with a concept layout, renderings, typical planning range and specifications. The Two-Storey Retreat is a separate design study.

Studio 400 architectural concept in natural daylightCompact living

Studio 400

400 sq ft

Studio1 bath

Detached · 1 story

$197,500 – $264,000Typical planning range

View complete model
Cottage 600 architectural concept in natural daylight

Cottage 600

600 sq ft

1 bed1 bath

Detached · 1 story

$302,500 – $405,500Typical planning range

View complete model
Flex 750 architectural concept in natural daylight

Flex 750

750 sq ft

2 beds1 bath

Detached · 1 story

$384,000 – $515,500Typical planning range

View complete model
Courtyard 850 architectural concept in natural daylight

Courtyard 850

850 sq ft

2 beds2 baths

Detached · 1 story

$449,500 – $602,000Typical planning range

View complete model
Residence 1000 architectural concept in natural daylight

Residence 1000

1,000 sq ft

2 beds2 baths

Detached · 1 story

$523,000 – $702,000Typical planning range

View complete model
Grand 1200 architectural concept in natural daylight

Grand 1200

1,200 sq ft

3 beds2 baths

Detached · 1 story

$630,500 – $846,000Typical planning range

View complete model
Garage Conversion architectural concept in natural daylight

Garage Conversion

Use your existing footprint

Layout tailored to your garage

Garage conversion

Property-specific estimateReview structure, utilities and layout.

Explore project options
Attached ADU architectural concept in natural daylight

Attached ADU

Designed around your home

Bedrooms and baths by design

Attached

Property-specific estimateExplore a connected addition.

Explore project options

Images and floor-plan thumbnails are illustrative concepts. Prices use standard finishes and steel framing, before property-specific site or utility upgrades; they are not bids. Final design, cost and permit eligibility require review.

Looking for another direction?Configure a model Explore the two-storey design study San Jose model & property guide

Custom Designs

Need something different? We can design a custom ADU for your property.

Learn more

Steel Frame Construction

Explore precision framing and a coordinated approach to building.

Learn about our technology

Permitting Support

We guide the design and permitting process from start to finish.

Our process

Let’s build your ADU

Your property.
Your next chapter.

Explore the possibilities for your California property.

Check my property
Architectural concept of a modern California ADU in a landscaped garden, shown in natural daylight
Design concept

Let’s talk about your project.

(650) 400-7606sales@adu.zone

San Jose office

84 West Santa Clara Street Suite 700
San Jose, CA 95113
(650) 400-7606Get directions

Walnut Creek office

1990 N California Blvd, 8th Floor
Walnut Creek, CA 94596
(925) 744-5040Get directions
ADU California Inc.
  • Houzz
  • Facebook
Legal & disclosuresPrivacyTerms of useAccessibility
CSLB License #1163442

© 2026 ADU California Inc. All rights reserved.

San Jose · Walnut Creek · California