Frequently Asked Questions (FAQs)
Everything You Need to Know About Building an ADU in SoCal
At Fortune ADU, we know that planning an ADU can feel overwhelming — with questions about cost, permits, zoning, and timelines. This page answers the most common homeowner questions so you can move forward with clarity and confidence.
General ADU Questions
1. What exactly is an ADU?
2. Why are ADUs so popular in California?
3. How much does it cost to build an ADU?
Costs depend on size, type, and site conditions, but most ADUs range between $120,000 and $350,000. Garage conversions are the most affordable; detached ADUs are the most customizable.
4. How long does the ADU process take?
Most projects take 6–12 months from design to completion. The timeline varies depending on permitting speed and construction complexity.
5. Will my property taxes increase?
Only for the new unit’s added value — your existing home’s tax base remains unchanged.
Permitting & Regulations
1. Do I need a permit to build an ADU?
Yes. All ADUs require building and zoning permits. Fortune ADU handles the complete submittal, plan check, and approval process for you.
2. Can I build more than one ADU on my property?
Yes! If you own a multi-family property, you can typically add two detached ADUs plus conversions of existing space (garages, storage, etc.).
3. What if my property is on a slope or has access challenges?
We’ll perform a feasibility study first to assess grading, utilities, and access — then design accordingly to meet code.
4. How long does permit approval take?
City review times average 6–10 weeks. Our permitting team ensures faster approvals with accurate, code-ready plans.
5. Can Fortune ADU handle permits for me?
Absolutely. We manage all permit documentation, revisions, and communication with city officials so you can relax while we handle the details.
Cost, Financing & Value
1. How do I finance an ADU?
Many homeowners use HELOCs (Home Equity Lines of Credit), cash-out refinances, or specialized ADU construction loans. We can connect you with trusted lenders who understand ADU projects.
2. What’s the return on investment (ROI) for an ADU?
Most homeowners see property value increases of 10–15% and monthly rental income of $2,000–$3,500, depending on location.
3. Are ADUs cheaper than buying another property?
Yes. Building an ADU typically costs 40–60% less than purchasing a new home of similar size.
4. Can I rent out my ADU short-term (Airbnb)?
In most California cities, short-term rentals of less than 30 days are restricted, but long-term rentals are allowed. We’ll review your local regulations before you start.
5. Do ADUs qualify for energy efficiency rebates?
Yes. Many utility providers offer solar or energy-efficiency rebates for ADU projects — we’ll help you apply.
Design & Construction
1. How big can my ADU be?
In San Diego, detached ADUs can be up to 1,200 sq. ft., attached units up to 50% of your home’s area, and JADUs up to 500 sq. ft.
2. Can I customize my ADU’s layout and finishes?
Absolutely! We offer design flexibility for layouts, finishes, and exterior styles that match your home and neighborhood.
3. How disruptive is construction?
We use efficient, low-impact construction practices to minimize noise and site disturbance. Your main home remains fully livable during the build.
4. Do you handle inspections?
Yes — we coordinate and attend every inspection to ensure your ADU meets all building and safety standards.
5. Can you match the look of my existing home?
Yes, our design team ensures seamless integration — so your ADU looks like it’s always been part of your property.
Still Have Questions?
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