The Complete ADU Resource
Everything You Need to Build,
Finance, and Rent an ADU
Accessory dwelling units can add six figures to your property value and generate passive income — but the permits, costs, and regulations are complex. We break it all down by state.
$47B
Projected ADU market by 2035
36
States now allow ADUs by right
$150K
Average increase in property value
How It Works
Building an ADU doesn't have to be overwhelming. Here's the path from idea to income.
Research
Understand your state's ADU regulations, permit requirements, and zoning rules. Use our state guides to find exactly what applies to your property.
Plan
Estimate your costs and ROI with our free calculators. Explore design options and financing — from HELOCs to ADU-specific construction loans.
Build
Find vetted local contractors, architects, and permit expediters in our directory. Get your project from permit to move-in.
Start With Our Top Guides
Long-form, state-specific, and updated for 2026 regulations.
Complete Guide to Building an ADU in 2026
Everything from zoning checks and permit applications to hiring contractors and managing construction. The only guide you need.
Read guide →FinancingHow to Finance an ADU: Loans, HELOCs, and More
Compare ADU-specific construction loans, home equity lines, cash-out refinancing, and government programs by state.
Read guide →ReturnsHow Much Can You Earn Renting an ADU?
Real rental income data by state and city. Learn what to expect, how to price your unit, and how to calculate your break-even.
Read guide →Free ADU Planning Tools
Run the numbers before you commit. No sign-up required.
ADU Cost Calculator
Estimate your total ADU cost by state, type, and size. Get a detailed breakdown of construction, permits, design, and utilities.
Estimate my costRental ROI Calculator
Enter your build cost and expected rent. See annual cash flow, cap rate, and how long until your ADU pays for itself.
Calculate my ROIPermit Timeline Estimator
How long will permits take in your state and city? Get a realistic timeline before you start planning your build schedule.
Check my timelineADU Feasibility Advisor
Not sure if you can build an ADU? Chat with our AI advisor about zoning, setbacks, lot requirements, and local rules for your property.
Ask the advisorFind ADU Professionals Near You
Vetted builders, architects, permit expediters, designers, and ADU lenders — searchable by state and specialty.
Are you a contractor? List your business →
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Stay Current on ADU Laws & Tips
ADU regulations change constantly. Get state law updates, financing tips, and project guides delivered to your inbox — no spam, unsubscribe anytime.
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From the Blog
News, analysis, and practical guidance for ADU owners and builders.
ADU Laws by State: What Changed in 2026
A dozen states updated their ADU laws in 2026. Here's a plain-English breakdown of what changed and what it means for homeowners.
ADU vs Tiny Home: Which Is Right for You?
Both add living space to your property, but the permits, financing, and resale implications are very different. We break down the tradeoffs.
Does an ADU Increase Property Value?
The data says yes — but how much depends on your state, neighborhood, and ADU type. Here's what the research actually shows.