You have more options than you think
Most California homeowners can finance an ADU in 2026 without selling assets or draining savings. Below is the complete menu of legitimate financing options, what each costs, and who qualifies.
Option 1: HELOC (Home Equity Line of Credit)
- Best for: Homeowners with 20%+ equity and FICO 700+
- Typical rate (May 2026): 7.5%–9.5% variable
- Loan amount: Usually 80–85% combined LTV
- Pros: Fast funding (3–5 weeks), interest-only draw period, flexible
- Cons: Variable rate, secured by your home
Option 2: Cash-Out Refinance
- Best for: Homeowners with strong equity who currently have a higher mortgage rate
- Typical rate: 6.5%–7.5% fixed (30-year)
- Pros: Locks in long-term fixed financing
- Cons: Resets your full mortgage; usually only makes sense if current rate is higher
Option 3: ADU-Specific Construction Loan
- Best for: Homeowners without enough current equity
- Typical rate: 8%–10% during construction, refinances at completion
- Pros: Underwrites against the after-completion value of the ADU
- Cons: Two-step process (construction → permanent loan)
Several California lenders specialize in this product — RenoFi, Plenty, and select credit unions.
Option 4: Renovation Mortgage (203k, HomeStyle)
- Best for: Buyers purchasing a home and adding an ADU as part of the purchase
- Typical rate: 6.75%–7.75% fixed
- Pros: Wraps acquisition + ADU into one loan
- Cons: Heavier paperwork; longer close
Option 5: CalHFA Forgivable Loan (when funded)
CalHFA periodically funds an ADU grant program offering up to $40,000 toward pre-development costs (design, permits, soils) that is forgiven if you build. Funds rotate — check current availability before assuming.
Option 6: Personal Cash + Phased Build
- Pros: No interest, no underwriting
- Cons: Concentration risk; opportunity cost
How to choose
| Situation | Best Option |
|---|---|
| 30%+ home equity, FICO 740+ | HELOC |
| Current mortgage rate above 7.25% | Cash-out refi |
| Low equity, strong income | ADU construction loan |
| Buying + building together | Renovation mortgage |
| First-time builder, low cash | Apply for CalHFA grant if open |
Vision ADU and financing
We don't lend, but we maintain working relationships with five lender partners who specialize in California ADU financing. We can connect you to a same-week pre-approval if needed. Book a free consultation and ask about financing options.
Frequently Asked Questions
Can I get a loan for just my ADU?
Yes. ADU-specific construction loans are designed for this and underwrite based on the projected value of the completed ADU.
What credit score do I need?
HELOCs and refis typically require 680+. ADU construction loans accept 660+ in some cases.
Can ADU rental income help me qualify?
Yes — most California ADU lenders allow 50–75% of projected ADU rent to count toward debt-to-income calculations.
Do I need to use a specific contractor?
Some lenders require an approved contractor list. Vision ADU is approved by major California ADU lenders.
How long does ADU financing take to close?
HELOCs: 3–5 weeks. Construction loans: 5–8 weeks. Renovation purchase mortgages: 8–12 weeks.
Related Vision ADU Resources
- ADU Permit Guide: Orange County 2026 (City-by-City)
- ADU Plans and Design Resources in California (2026)
- ADU Floor Plans by Size: Studio to 2-Bedroom (California 2026)
- SB 9 vs ADU in California: Which Path Is Right for Your Property? (2026)
- ADU Contractor in Burbank
- ADU Contractor in Pasadena
- Los Angeles County ADU Builder
- Orange County ADU Builder
- Inland Empire ADU Builder
- 2026 ADU Cost Calculator
- All Vision ADU Service Areas