The second question in every ADU conversation, right after "what will it cost," is "how do people pay for it?" It is a fair question. In our projects a garage conversion ADU runs $105K–$175K and a detached unit $175K–$315K+, and very few families have that sitting in a checking account. Almost everyone finances at least part of an ADU, and the choice of how shapes the project as much as the design does.
This guide walks through the options we see Los Angeles homeowners actually use in 2026, what each is good for, what lenders will ask of your builder, and the current, honest status of the grant programs people keep hearing about. One thing first: we are a design-build contractor, not a lender or a financial advisor. What follows is what we have learned from building ADUs that were financed every one of these ways. Your own numbers belong in a conversation with a lender.
The short answer
Most ADUs in Los Angeles are paid for with home equity in one form or another, because most owners who build one have owned their home long enough to have it. The rest are financed by loans that treat the ADU as part of the property's future value.
| Option | How it works | Best for | Watch out for |
|---|---|---|---|
| Cash or savings | You pay as the project progresses | Smaller conversions; owners who want no new debt | Keep a contingency; do not drain reserves for a 6–12 month project |
| HELOC | A revolving line secured by your home; draw as you need | Garage conversions and mid-size units; owners with a low first-mortgage rate they want to keep | Variable rate; interest-only periods that end; lenders cap total loan-to-value |
| Home equity loan | A fixed lump sum secured by your home, repaid over a set term | Owners who want a fixed payment and know the total | Less flexible if the scope changes; same loan-to-value limits |
| Cash-out refinance | Replace your mortgage with a larger one and take the difference | Owners whose current mortgage rate is not far below today's | Giving up a low rate on the whole balance to fund a fraction of it |
| Renovation loan (HomeStyle, 203(k), CHOICERenovation) | One mortgage that funds the purchase or refinance plus the ADU, based on the after-completion value | Buyers, and owners with less equity today; projects where future rent should count | Lender plan review, draw inspections and paperwork add time; work must be done by a licensed contractor under contract |
| Construction or construction-to-permanent loan | Funds a detached build in draws, then converts to a mortgage | Larger detached ADUs; new homes built with an ADU | Interest during construction; strict draw schedules |
| ADU-focused lenders and community lenders | Loans designed around ADU projects, sometimes with income limits | Owners who do not fit conventional boxes | Program terms change; verify directly with the lender |
| Grants | Public money you do not repay | Almost no one right now | California's ADU grant is closed; see below |
Match the money to the project
The right financing usually follows the size of the project.
Garage conversion ADU, $105K–$175K. This is home-equity territory for most owners. A HELOC lets you draw as invoices come in, so you are not paying interest on money sitting idle during design and permits. A home equity loan makes sense when you want a fixed payment and the scope is locked, which it should be by the end of design. Our Leyte Drive and Dawes Avenue conversions, at $117K and $134K, are the scale of project these products handle comfortably for an owner with equity.
Detached ADU, $175K–$315K+. Equity still works when there is enough of it. When there is not, or when the owner bought recently, this is where renovation and construction loans earn their paperwork. They lend against what the property will be worth with the unit finished, not only what it is worth today, and some let the unit's future rent count toward qualifying. Our Inglewood 65th Street ADU, a 600 sq ft two-bedroom at $175K, sits at the boundary between the two approaches.
A new home plus an ADU. A construction-to-permanent loan can fund both the house and the unit in one package and convert to a standard mortgage at completion.
Using the future rent to qualify
This is the part of ADU financing that has changed most in the last few years, and the part most homeowners do not know about.
FHA. Since October 2023, FHA-approved lenders may count 75 percent of the estimated rental income from an existing ADU toward qualifying income, and 50 percent of the estimated rent from a new ADU that a borrower plans to build by converting an existing structure, such as a garage, under FHA's Standard 203(k) rehabilitation loan. FHA also added ADU-specific appraisal requirements so the appraiser identifies the unit and estimates its rent. (NAHB summary of the HUD announcement)
Fannie Mae. Fannie Mae treats an ADU like any other property feature and allows any of its loan products to finance a home with one. Borrowers can add an ADU to a 1-unit property with a HomeStyle Renovation loan, buy or refinance a home with an existing ADU using HomeReady and include rental income to qualify, and finance a new home with an ADU through construction-to-permanent lending. Properties with more than one ADU, and 2- to 4-unit properties, are not eligible. (Fannie Mae, Accessory Dwelling Units)
Freddie Mac offers a comparable renovation product, CHOICERenovation, that lenders use for ADU projects.
What this means in practice: if your income alone would not support the loan, a lender working under these programs can look at what the finished unit will rent for. That estimate comes from an appraisal, and the appraisal comes from plans. Which is why the design phase and the financing conversation should happen together, not one after the other.
What lenders will ask of your builder
Renovation and construction loans are not paid to you in a lump sum. The lender approves the project, then releases money in draws as work is completed and inspected. To approve it, they need things only your contractor can provide, and the projects that go smoothly are the ones where the builder has produced this paperwork before.
- A licensed, insured general contractor under a written contract. Lenders will verify the license. Unpermitted work and unlicensed builders are not fundable, full stop.
- Complete plans and a permit path. Architectural drawings, structural engineering and Title 24 energy compliance, with plan check under way or approved.
- An itemized proposal. A line-item budget, not a single number. Lenders compare it to the appraisal and to their own cost expectations.
- A construction schedule with milestones. Draws are tied to it. Foundation, framing, rough utilities, drywall, finishes, final.
- Lien releases and insurance certificates at each draw.
This is the paperwork we produce for every ADU whether or not a lender asks for it, because it is the same paperwork that keeps a project predictable. If you are financing, tell us at discovery. We will sequence the design so the drawings and the itemized proposal are ready when the lender needs them, rather than weeks later.
Grants and public programs: the honest status
Homeowners still arrive at our first meeting having heard about "the $40,000 ADU grant." Here is where it stands.
CalHFA ADU Grant Program. The California Housing Finance Agency's grant reimbursed up to $40,000 in pre-development costs for income-qualified owners. Its most recent round of funding was fully allocated in December 2023, and as of this writing the program is not accepting applications and has not announced a new round. Check the program page at calhfa.ca.gov/adu for the current status, and treat anyone who promises to "get you the grant" for a fee as a warning sign. CalHFA itself has cautioned homeowners about that.
Los Angeles ADU Accelerator Program. This is not a construction fund. It is a City of Los Angeles program that matched existing ADUs with older-adult tenants and provided tenant referrals and case management. It is not a way to pay for a build.
Community lenders. Some nonprofit and community development lenders in Los Angeles County offer ADU loans, sometimes with income limits and sometimes with better terms than banks for owners who qualify. Programs open and close; verify current terms directly with the lender before you plan around them.
Money you do not spend. Two rules matter more than any grant. Under state law effective 2026, an ADU under 750 square feet of interior livable space is exempt from local impact fees, and larger units pay fees proportional to the primary home. And adding an ADU does not trigger a reassessment of your existing home for property tax; only the new construction is added to your assessed value. Confirm your own situation with a tax advisor, but both rules favor building.
The cost of financing versus the cost of waiting
Homeowners sometimes wait for rates to fall or for a grant to reopen. That can be right, and it has a cost. Construction prices in Los Angeles have not gone down while people waited, and every month a finished unit is not rented is a month of income that does not arrive. We would not advise anyone on rates, but we would suggest doing the arithmetic on both sides: what the financing costs per month, and what the unit would earn or save per month once it exists. That comparison, done with real numbers for your lot, is more useful than any prediction about the market.
Common mistakes
- Designing first, financing last. Get pre-qualified early, and tell the lender and the builder about each other. The lender needs plans; the builder needs to know the draw schedule.
- Borrowing the base cost with no contingency. Older garages and older sewer lines reveal things. Finance the contingency, do not hope you will not need it.
- Forgetting the carrying costs. Six to twelve months of interest on a construction line, plus permit and utility fees, belong in the plan.
- Using short-term money for a long-term asset. Credit cards and personal loans for a six-figure project rarely end well.
- Refinancing a low-rate mortgage to fund a fraction of its balance. A HELOC or home equity loan often makes more sense than giving up a rate you cannot get back.
- Choosing an unlicensed or unpermitted builder to save money. No lender will fund it, no insurer will cover it, and it cannot be legally rented.
How we work with financed projects
- Discovery. A site visit, a look at what the lot allows, and a preliminary investment range for the path that fits. Tell us how you plan to pay; it changes the sequence, not the design.
- Design. Drawings, a photoreal 3D model and every selection decided, so the itemized proposal is real. This is the document lenders and appraisers work from.
- Planning and permits. Engineering, energy compliance, plan check and a locked schedule, which becomes the lender's draw schedule.
- Construction. Milestone-based progress, inspections, lien releases and the paperwork each draw requires, handled by our project manager.
- Final walkthrough. A permitted, inspected, move-in-ready unit, and the certificate of occupancy your lender and your future tenant both want to see.
Our ADU page covers the unit types and process, our ADU cost guide explains what is inside each number, and our comparison of a garage conversion versus a detached ADU helps decide which path to finance in the first place. Finished units are in our ADU projects.
A realistic next step
Financing an ADU starts with a number a lender can underwrite, and that number comes from a real plan for a real lot. Request a consultation and we will walk your property, tell you which ADU path fits, and give you a preliminary investment range you can take to a lender. If you already have a lender, bring them into the conversation early; we are glad to speak with them.