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Guides on costs, permits, financing, and floor plans — plus stories from real ADU builds.

Modern ADU idea with sleek contemporary design
ADU

Modern ADU: Diverse and Full of Character

Explore modern ADU designs from 200 to 1,000 sq ft, plus prefab options, costs, and the steps to build your own backyard unit.

Casita plans for a backyard with a small detached guest house
ADU

Casita Plans for Backyard: Transform Your Space with Ease

Explore casita plans for your backyard, from permits and materials to layout ideas. See how we turn yard space into a guest suite or ADU.

Efficient compact ADU kitchen layout
ADU

Small Kitchen Set: 10 Essential Tools For Efficient Cooking

Build a kitchen that works without crowding the counter. Our 10 essential tools for small kitchens, plus storage tips that scale.

black and white ADU exterior
ADU

ADU Plans and Designs: Accessory Dwelling Units 101

A practical guide to ADU plans: the three types, sizes from 150 to 1200 sqft, the 750 sqft fee exemption, and permitting.

studio interior for a home addition
ADU

Home Addition or ADU: how to make the right decision

Home addition or ADU? Compare costs, property taxes, and resale value so you can pick the right way to add space.

minimal junior accessory dwelling unit
ADU

A simple guide to junior accessory dwelling units in Ca

Junior ADUs add a 150 to 500 sq ft unit inside your California home. Learn the rules, costs, and how a JADU differs from a regular ADU.

augmented reality in ADU design
ADU

AR for ADU: Benefits of augmented reality building

Place a virtual ADU in your backyard with your iPhone. AR helps you visualize the design and avoid costly change orders before construction.

mother-in-law unit
ADU

Mother-in-law unit: 5 ways to add without major construction

Add a mother-in-law suite using space you already have. Basement, garage, loft, pool house, or combined rooms, plus permit basics.

Open space family room
ADU

ADU Design: 5 Fail-Proof Features

Open floor plans, smart spatial planning, flexible universal design, ventilation, and lighting: the 5 must-have ADU design features.

Space for backyard housing
ADU

Backyard Housing for Affordable Starter Homes

Compare tiny homes, ADUs, and conversions as affordable backyard housing in California, with costs, zoning rules, and the pros and cons.