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ADU tips & guides

Practical advice on planning, budgeting, and building a backyard home — from first idea to final permit.

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ADU Planner for your accessory dwelling unit with 700 designs

Use our free ADU planner to explore pre-designed plans, get all-in estimates, and follow a clear permit-to-build path. Boost your home value 20–30%.

ADU Planner 15 milestones
ADU

Blog

Latest articles

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

Mother-in-law backyard suite separated from the main house
ADU

Homes With Mother-In-Law Suites: Buy One or Build One?

A mother-in-law suite is a separate living space with its own entrance, bath, and kitchen. What drives cost, and buy-vs-build math.

300 sq ft ADU
ADU

How Big Is 300 Square Feet? Real Dimensions and Uses

A 300 sq ft space is 25% larger than a standard one-car garage and close to the interior of a 40-foot shipping container. Dimensions inside.

In the sauna
Accessory Buildings

Sauna and Cold Plunge: Building Contrast Therapy at Home

Pair a backyard sauna with a cold plunge for contrast therapy. See the Sauna Plunge and Plunge Plus models, pricing, and Bay Area installation.

checking permit documents
ADU

We Analyzed 712 Plan Check Comments. Here’s Why Your ADU Permit Keeps Getting Rejected.

We analyzed 712 plan check comments across 7 California cities and found most ADU permit delays trace to missing info.

movers' truck with loaded household goods
Home Design

Stay, sell, renovate, or build? Most homeowners are asking the wrong question.

We built a decision tool, then stress-tested it on four real Bay Area situations. Here's what it found.

One-bedroom modular ADU lifted by a crane during installation
Prefab Building

Two Story Prefab Homes- Smart Move, New Floor Plans

Explore two-story prefab homes: faster builds, lower costs, energy efficiency, and modular floor plans that maximize space on a smaller footprint.

image of a door frame on a meadow to symbolize an unpermitted unit
ADU

How to Prove Your Unpermitted ADU Existed Before 2020 (AB 2533 Evidence Guide)

California's AB 2533 lets you legalize a pre-2020 unpermitted ADU, but the burden of proof is on you. Here's exactly where to look.

black color shower set
Shopping Ideas

Shower Systems: Complete Guide to Choosing the Right Setup for Your Bathroom

Compare shower systems — conventional, digital, thermostatic, power, plus components and installation. Find what fits your bathroom and pressure.

how big is 1000 square feet
ADU

How big is 1000 square feet? Prepare to Be Surprised.

See exactly how big 1000 square feet (1000 sq ft) really is, room by room, with dimensions, comparisons, and ADU floor plan ideas to match.

Basement apartment with a kitchen
Home Design

Convert Smarter, Spend Less: Turning Your Basement or Attic Into Sustainable Living Space

Convert your basement or attic into legally habitable space while locking in an energy retrofit. Stack rebates, cut bills, add value.