Skip to content 
Turning an old garage into a livable space may sound challenging, but with the right plan and team, it can be fast, affordable, and rewarding. This North Park, San Diego, project is a perfect example of a successful garage conversion into a stylish, fully functional ADU.
Why Build an ADU in San Diego?
ADUs (Accessory Dwelling Units) are small, independent living spaces built on residential lots. Thanks to updated ADU regulations in San Diego, homeowners can convert existing garages or build new units with fewer restrictions.
Top Benefits of Building an ADU:
- Add extra living space for guests or family
- Earn passive income through long-term rentals
- Boost your home’s value
- Faster and more affordable than full room additions
Project Overview: Garage Conversion in North Park
- Location: North Park, San Diego
- Timeline: 4 months
- Scope: Convert a narrow garage into a 1-bedroom ADU with kitchen, bath, and laundry
Step-by-Step: How We Converted the Garage
1. Planning and Permits
We created a custom design and secured all city permits to meet ADU codes and maximize the layout.
2. Demolition and Utility Installation
The old garage was stripped down. We added new plumbing, electrical systems, and insulation to meet current building standards.
3. Framing and Exterior Upgrades
We framed out the new windows and doors, applied smooth stucco, and created a clean entry path with modern pavers.
4. Interior Finish Work
- Full kitchen with shaker cabinets, tile backsplash, and appliances
- Wood-look vinyl plank flooring throughout
- Modern bathroom with glass shower and tiled walls
- Stacked washer/dryer tucked in a laundry nook
ADU Rules and Regulations in San Diego
- No minimum lot size required
- No additional parking required near public transit
- Permit fee waivers for ADUs under 750 sq. ft.
- Can have both an ADU and a Junior ADU (JADU)
We handled all permitting and inspections from start to finish.
Project Challenges and Solutions
- Uneven slab: Leveled with concrete mix
- Low ceiling height: Framed and raised ceiling to meet code
- Plumbing access: Trench dug to connect to main sewer line
Garage Conversion Cost and Value
Average Cost Range:
- $90,000 – $110,000 (basic finish)
- $120,000 – $160,000 (mid-range finish)
- $160,000 – $200,000+ (high-end finish)
Return on Investment:
- Adds 350–450 sq. ft. of usable space
- Boosts property value by $100,000–$200,000
- Generates $1,800–$2,500/month in rental income
FAQ: ADU and Garage Conversions in San Diego
Do I need a permit to convert my garage?
Yes. We handle the entire permitting process for you.
Can I rent my ADU on Airbnb?
Long-term rentals are allowed. Short-term rentals depend on zoning laws.
How big can my ADU be?
Up to 1,200 sq. ft., depending on your lot size and local rules.
Can I include a full kitchen and bath?
Yes — if it meets the code, your ADU can be fully self-contained.
How long does a garage conversion take?
Most projects take 3–5 months. This one was completed in just 4.
What the Homeowner Said
\”I can’t believe this used to be our garage. It looks and feels like a brand-new home!\”
Now they have a private guest space — and the potential for future rental income.
Ready to Build Your Own ADU?
If you’re ready to turn your garage into a beautiful and functional ADU, we’d love to help.
Optimal Home Remodeling & Design specializes in:
Contact us today for a free consultation, and let’s talk about your ADU or garage conversion project.
