ADU Cost Calculator & Resources

Get instant cost estimates for your garage conversion project and access our comprehensive library of ADU planning resources.

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ADU Cost Calculator

🏗️ ADU Cost Calculator

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Frequently Asked Questions

Get answers to common questions about garage conversions and ADU projects

Do I need permits for a garage conversion?
Yes, garage conversions typically require building permits in California. The permit process ensures your conversion meets safety codes, zoning requirements, and local regulations. Our planning guides include detailed permit checklists for each city.
What's the typical timeline for a garage conversion?
Most garage conversions take 3-6 months from permit application to completion. This includes 2-8 weeks for permit approval, 2-4 weeks for design finalization, and 8-12 weeks for construction, depending on project complexity.
Can I convert my garage if I don't have other parking?
Many cities allow garage conversions even without replacement parking, especially under recent ADU laws. However, requirements vary by location. Some cities may require street parking availability or alternative parking solutions.
What utilities need to be added for a garage conversion?
Most garage conversions require upgrading electrical systems, adding plumbing for bathrooms and kitchens, installing proper HVAC for climate control, and ensuring adequate insulation. Gas lines may be needed for cooking or heating.
How much value does an ADU add to my property?
Well-executed ADU conversions typically add $75,000-$150,000 in property value, depending on size, quality, and location. The ROI is usually 70-90% of construction costs, plus ongoing rental income potential of $1,500-$3,500 per month.
What's the difference between attached and detached ADUs?
Attached ADUs connect to the main house (like garage conversions), while detached ADUs are separate structures. Attached ADUs often have simpler utility connections and lower costs, while detached units offer more privacy and design flexibility.

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