California's Home Improvement & ADU Resource
Unlock the Potential of Your California Property
Understand your options. Explore ADU requirements. Estimate project costs. Ask questions. Connect with qualified California professionals — all in one place.
What Can We Help You With?
Whether you're exploring an ADU or planning another improvement, start by understanding your options.
Build an ADU
Understand your options before you build.
Explore My Property
Discover potential opportunities for your California property.
Garage Conversion
Learn what may be involved in converting existing space.
Plans & Permits
Understand the planning and permitting journey.
Estimate My Project
Explore preliminary project cost ranges.
Get Matched
Be matched with professionals who fit your project and area.
Financing
Understand common ways homeowners finance construction projects.
Ask ADU California AI
Ask questions about ADUs, construction, planning, and your project.
Coming next
Meet ADU California AI
Your California Home Improvement Assistant
Have questions about ADUs, permits, project costs, construction, or what may be possible with your property? ADU California AI is being designed to help you understand your options and navigate the process.
Ask ADU California AIThe assistant is in development. Here are examples of the questions it is being designed to help with:
- Can I build an ADU on my property?
- How much might an ADU cost?
- Can I convert my garage?
- What permits might I need?
- What professionals should I talk to?
ADU California AI is not yet available and does not provide legal, zoning, or property determinations.
ADU California AI
Meet Cali
Your ADU California AI Property Advisor
Hi! I'm Cali. I'm here to help you understand your property, explore what's possible, estimate planning costs, explain California regulations, guide your project from start to finish, and connect you with trusted professionals when you're ready.
Ask me anything about your California property.
Start Chatting with CaliYour ADU Journey
From the first idea to the final inspection, understand the process before you begin.
- 01Property & Feasibility
- 02Design
- 03Engineering
- 04Budget & Financing
- 05Permits
- 06Contractor Selection
- 07Construction
- 08Inspections
- 09Completion
Education
California ADU Guide
Clear information to help California homeowners understand ADUs before making major decisions.
ADU Information Where You Live
California ADU requirements can involve both statewide law and local city or county processes. Explore information relevant to your area.
More Than ADUs
Your property may have more possibilities than you realize. ADU California is being built to help homeowners navigate residential improvement projects throughout California.
Find the Right Professionals for Your Project
When you're ready to move forward, ADU California can help you find professionals who serve your area and project type.
For Professionals
Build Your Business With ADU California
Are you a contractor, architect, engineer, designer, or home improvement professional serving California homeowners? Apply to become part of the growing ADU California professional network.
Join the Professional NetworkBetter Information. More Confident Decisions.
ADU California exists to make the earliest, most confusing part of a residential project clearer — before any money is spent.
- Help homeowners understand their options.
- Help homeowners learn before hiring.
- Help homeowners understand the project process.
- Help homeowners ask better questions.
- Help homeowners find appropriate professionals when they are ready.
Start With Your Property
Every project begins with understanding what's possible.
ADU California is an independent private resource and is not affiliated with or endorsed by the State of California or any government agency.