Your Trusted Source for ADU Information in California

Navigate the world of Accessory Dwelling Units with expert guidance, from planning and permits to construction and management.

California homeowner standing in front of a finished ADU

ADU Planning

Get expert guidance on ADU regulations, permits, and design considerations for your property.

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Financing Options

Explore financing solutions and understand the costs involved in building your ADU.

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Construction Guide

Find qualified contractors and learn about the construction process from start to finish.

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ADU Resources

Access our comprehensive library of ADU guides, tips, and best practices.

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Free California ADU eBook

Download the 2026 guide covering permits, financing, design decisions, and the full ADU process.

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ADU Building Checklist

Use the printable checklist to stay on track from first planning steps through final inspection.

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Find ADU Contractors

Tell us about your project and get matched with California ADU contractors that fit your build.

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Latest ADU Insights

ADU for aging parents

March 7, 2026

Building an ADU for Aging Parents in California

Accessibility features, aging-in-place design, and why ADUs beat assisted living ($550K+ savings over 10 years).

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ADU vs home addition

March 7, 2026

ADU vs. Home Addition: Which Is Better in 2026?

Permit speed, costs, rental income, and property value impact — a side-by-side comparison to help you decide.

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CalHFA ADU grant

March 7, 2026

CalHFA ADU Grant Program 2026: Up to $40,000

How to apply for California's $40K ADU grant: eligibility, income limits, what it covers, and tips to maximize it.

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Ready to Start Your ADU Project?

Let us help you navigate the process and create your perfect ADU.