Your Guide to ADUs: Zoning, Permits, & Process
Navigate the rules, understand costs, and start your project with confidence. We've simplified the complex.
The ADU Process, Simplified
Research & Feasibility
Understand local rules and property potential.
Design & Budget
Choose a plan and explore financing options.
Permitting
Submit plans to your local building department.
Build & Install
Site prep, construction, and final inspection.
Explore Our Resource Library
Zoning & Regulations
ADU Size Guide: From Studio to 2-Bedroom
Studio ADUs (300-500 sq ft) cost $120-180K and work for singles. One-bedroom ADUs (500-700 sq ft) cost $180-250K and suit most needs. Two-bedroom ADUs (800-1200 sq ft) cost $250-350K+.
Read MoreADU Design Trends 2025
Top ADU trends for 2025: sustainable materials, smart home tech, indoor-outdoor living, and Scandinavian minimalism. Here's what homeowners are actually building.
Read MoreFinancing & Costs
Modular vs Stick-Built ADUs: Which is Right for You?
Both modular and stick-built ADUs create beautiful, livable spaces. Modular ADUs install in weeks for $150-250K, while stick-built offers more customization for $180-300K.
Read MoreADU Design Trends 2025
Top ADU trends for 2025: sustainable materials, smart home tech, indoor-outdoor living, and Scandinavian minimalism. Here's what homeowners are actually building.
Read MoreDesign & Inspiration
Financing Your ADU: Loans, HELOCs, and Options
Most homeowners finance ADUs with home equity loans, HELOCs, or cash-out refinancing. Here's how to choose the right option and what lenders actually approve.
Read MoreADU Rental Income: What to Expect
ADU rental income typically adds $1,200-$3,000/month to your household income. Here's what homeowners are actually earning and how they make the numbers work.
Read MoreFrequently Asked Questions
How long does it take to build an ADU?
The timeline varies depending on the type of ADU and local regulations. Prefab ADUs can be installed in 3-6 months, while custom stick-built ADUs typically take 8-12 months from permit application to final inspection.
What's the average cost of an ADU?
ADU costs range from $100,000 to $400,000+ depending on size, finishes, and location. Prefab units typically cost $150,000-$250,000, while custom builds range from $200,000-$400,000+. Costs per square foot average $200-$400.
Do I need to hire an architect?
Not always. Many prefab manufacturers provide pre-designed plans that are ready for permitting. For custom builds or unique sites, hiring an architect is recommended to ensure your design meets local codes and maximizes your property.
Can I use my ADU as a rental?
This depends on your local zoning laws. Many cities allow ADU rentals, but some require owner occupancy of either the main house or ADU. Some jurisdictions also restrict short-term rentals. Check your local regulations before planning to rent.
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