ADU Resources
400 sq ft Garage Conversion ADU – Cost Breakdown (Los Angeles)
Converting a garage into a fully legal and livable Accessory Dwelling Unit (ADU) in Los Angeles is one of the most affordable ways to add housing but it still involves careful planning, permitting, and construction. Here's a breakdown of what you can expect for a 400 sq ft garage conversion in 2025:
Design & Permitting: $8,500 – $12,000
Construction: $75,000 – $120,000
Utilities & Site Work: $7,000 – $17,000
Appliances and Fixtures: $3,000 – $8,000
Contingency Budget: $10,000 – $15,000
Total Estimated Cost: $103,500 – $172,000
This all-inclusive estimate reflects a complete, code-compliant ADU conversion in Los Angeles. Your final cost will depend on existing garage conditions, finish selections, utility access, and permit timelines.
Add Value. Create Flexibility. Build for the Future.
An Accessory Dwelling Unit (ADU) is more than just extra space, it’s a smart, future-ready investment that transforms the way you live, earn, and grow in your home.
1. Generate Rental Income
Turn your property into a source of passive income. Whether it’s a long-term tenant, a traveling nurse, or a short-term guest, ADUs create steady cash flow and help offset your mortgage or other expenses. You also don’t need to live in the house to rent the ADU separately.
2. Increase Property Value
ADUs are one of the most effective ways to boost your home’s market value. In many cases, they offer a higher return on investment than traditional home renovations or additions.
3. Create Space for Family
Welcome aging parents, adult children, or extended family; all while giving everyone the privacy and independence they need. ADUs are perfect for multigenerational living.
4. Flexible Use Over Time
Guest house. Home office. Studio. Gym. Caregiver suite. An ADU can adapt to your changing lifestyle needs now and in the future.
5. Maximize Underused Space
Got a garage or large backyard? Build up, build out, or convert — and make the most of what you already own.
6. Support Affordable Housing
By building an ADU, you’re contributing to a more sustainable housing solution in your community; without sacrificing your own comfort or space.
Ready to Get Started?
We make the process seamless. From design to permits to construction; let’s build something great on your property.