ADU Financing in California: Loans, Equity and Grants
Most California ADUs are paid for with home equity, a construction loan, a refinance, or a mix, sometimes with a state grant covering early costs. Here is how each works for a California project, who each suits, and how to talk to a lender who actually finances ADUs.
- We explain every option, not just one product
- Matched with lenders who finance ADUs
- No obligation to take any offer
Start with three questions
California helps in a few ways. High home values mean many owners hold strong equity, often enough to cover a backyard unit. State ADU law requires cities to act on a complete application within a set review period and limits impact fees on smaller units. Adding an ADU triggers reassessment of the new construction only, not the whole property. Confirm the details with your city or county.
Then answer three questions.
- How much equity do you have after your current mortgage?
- Is your current mortgage rate one you want to keep?
- Does the full project budget, including permits, fees and utility work, fit inside that equity?
If the answer to the third question is yes, home equity is usually the simplest route. If it is no, look at loans that lend on the value of the finished property.
California ADU Financing Options We Cover
Each option below covers how it works in California, the trade offs and when to choose it.
CalHFA ADU Grant Program
What the state grant reimburses and how to check whether it is currently funded.
California ADU construction loans
Paid to your builder in draws as the unit passes inspection.
ADU cost in California
The cost lines that set your budget, and how to match them to a loan.
Garage conversion ADU cost
Often the lowest cost route, and the loans that fit a smaller project.
Prefab ADU financing in California
How to fund factory deposits, site work and the install.
California HELOC for an ADU
Draw on your equity as builder invoices arrive.
ADU loan calculator
Estimate a payment from the rate, term and amount a lender quoted you.
ADU cost and financing in Los Angeles
LADBS permits, hillside lots and how LA owners pay.
ADU cost and financing in the Bay Area
Labor, site access and local fees, and the loans that fit.
How getting matched works
1. Tell us about the project
ADU type, rough budget, timeline and the California ZIP code of the property. It takes about two minutes.
2. We connect you with a lender
We pass your details to a lender who finances California ADUs and offers the kind of loan that fits.
3. You compare and decide
The lender quotes real terms. You decide whether to go ahead. There is no obligation to take any offer.
We do not lend money, and we never ask for your Social Security number. Any credit application happens directly with the lender you choose.
California ADU financing questions
What's the best way to finance an ADU?
In California it often starts with equity. Owners with strong equity and a low first mortgage rate often use a HELOC or home equity loan. Owners whose equity falls short of the budget usually need a construction or renovation loan that lends on the finished value.
Do you have to pay property taxes on ADU in California?
Yes, on the new construction. Adding an ADU triggers reassessment of the new unit only, not your whole property, so the value of the ADU is added to your existing assessed value. Confirm the details with your city or county.
Will the CalHFA ADU grant Program be available in 2026?
CalHFA has released ADU grant funding in rounds that open and close on their own schedule. Check calhfa.ca.gov for current status, and plan a budget that works without it.
Talk to a lender who finances California ADUs
Share a few details about your project and we will connect you with a lender who finances ADUs in California, so you can compare real terms instead of guessing.
Thanks. We have your details and a lender who finances ADUs will be in touch, usually within one business day.