How to Finance a Home Remodel or ADU in California

Most remodels and ADUs in Los Angeles cost more than people keep in a checking account, so the question that comes right after "what will it cost?" is "how do I pay for it?" The answer depends on how much you need, how fast you need it, how much equity you have in your home, and what interest rate is on your current mortgage. This guide walks through the main options in plain terms, what is different when the project is an ADU, and what to ask a lender before you commit.

Please read this first: UpFront Remodeling is a licensed contractor, not a lender, and nothing here is financial, tax or legal advice. Interest rates, fees, loan limits and program rules change often and differ by lender and by borrower, so this guide deliberately does not quote current rates. Treat it as a way to understand your options and ask better questions, then get actual quotes from lenders. This guide was last reviewed in October 2026.

The main ways to finance a remodel

Home equity line of credit (HELOC)

A HELOC is a revolving line of credit secured by your home, sitting behind your existing mortgage. You draw money as you need it and pay interest on what you have drawn, which suits a project paid in stages. Rates are usually variable, so your payment can rise or fall over time, and a typical structure is a draw period of around ten years followed by a repayment period. Its biggest advantage for many homeowners is that it leaves your existing mortgage, and its interest rate, untouched.

Home equity loan

A home equity loan is also a second loan secured by your home, but you receive a single lump sum up front and repay it at a fixed rate over a fixed term. It fits a project with a well-defined budget, because you know the payment from day one. The trade-off is that you start paying interest on the whole amount immediately, even money you have not spent yet.

Cash-out refinance

A cash-out refinance replaces your current mortgage with a new, larger one and hands you the difference in cash. Because the whole balance is refinanced, it generally makes the most sense when the new rate is close to, or better than, the rate you already have; if you hold a low rate today, giving it up on your entire balance to fund a remodel can cost far more than a HELOC on just the amount you borrow. Closing costs are also higher than on a second loan, commonly cited as a few percent of the loan amount.

Renovation loans

Renovation loans, such as Fannie Mae's HomeStyle Renovation, Freddie Mac's CHOICERenovation and the FHA 203(k), fold the cost of the work into a single mortgage, sized on what the home will be worth once the work is finished. They are used most often by buyers purchasing a home that needs work, but some can also be used by owners. Fannie Mae states that its Selling Guide loan products can be used to renovate an existing ADU or add one to a home you already own, so ask a lender whether a renovation product such as HomeStyle fits your project. Expect more paperwork than a HELOC: the lender typically reviews the plans and contractor, and releases money in stages as work is completed.

Personal loans and savings

A personal loan needs no equity and funds quickly, but rates are generally higher than loans secured by your home, so it tends to suit smaller projects. Paying from savings avoids interest entirely; the question is whether draining your cash reserves leaves you comfortable if the project hits a surprise.

Financing an ADU specifically

The options above are the same ones used for an ADU, and a HELOC, a cash-out refinance or a renovation loan is how most homeowners pay for one. There are a few ADU-specific points worth knowing:

• Projected rent usually does not count. With many loan types, a lender will not count rent from an ADU that has not been built yet when deciding whether you qualify, so you generally need to qualify on your existing income. Ask each lender how it treats ADU income.
• Existing ADU rent can sometimes count. Fannie Mae's guidelines allow rent from an existing ADU to count toward qualifying income in some purchase and limited cash-out refinance situations, subject to a cap. This applies to an ADU that already exists, not one you plan to build.
• The state's $40,000 ADU grant has closed. The CalHFA ADU Grant Program, which covered up to $40,000 of pre-development and closing costs for income-qualified homeowners, was fully allocated in December 2023 and was not accepting applications as of the 2026 sources we reviewed. Programs like it can be refunded, so check the California Housing Finance Agency website directly. CalHFA itself warns that anyone who offers to obtain an ADU grant for you may be running a scam.

For what an ADU actually costs in Los Angeles, which is the number you are financing, see our guide to ADU costs in Los Angeles.

How financing affects the project itself

The way you finance shapes how money moves during construction. A lump-sum loan puts the full amount in your account before work starts, a HELOC lets you draw as bills come due, and a renovation loan releases money in stages tied to completed work. Whichever you choose, California limits how much a contractor can collect up front: the down payment on a home improvement contract cannot exceed $1,000 or 10% of the contract price, whichever is less, and our guide to hiring a remodeler in LA and Ventura County explains how that rule applies to ADUs and to advance payments from lenders. After that, payments should track the work actually completed.

How to compare your options

• Total cost, not just the rate. Compare the APR, fees, closing costs and the total interest you would pay over the life of the loan.
• Fixed or variable. A variable rate can start lower but can rise; a fixed rate gives you a payment you can plan around.
• What it does to your current mortgage. A second loan leaves your first mortgage alone; a cash-out refinance replaces it.
• Timing. HELOCs and home equity loans often close in a few weeks, and cash-out refinances commonly take a month or more, so start the conversation before you need the money.
• Your home is the collateral. Home equity loans, HELOCs and refinances are secured by your property, so be honest with yourself about the payment you can sustain.
• A cushion for surprises. Remodels, especially in older homes, can uncover problems behind the walls. Build room for that into what you borrow rather than discovering it midway.

Whoever arranges your financing, including a contractor or a lender a contractor recommends, compare it against at least one loan you shop for yourself.

Questions to ask a lender

• What is the APR, and what are all the fees and closing costs?
• Is the rate fixed or variable, and how high can a variable rate go?
• Is there a prepayment penalty?
• Will you count any rent from the ADU, and if so, how?
• How and when are funds released, and do you need to approve the contractor, the plans or the contract?
• How long from application to funding?

Start with a real number

Every option above is easier to evaluate once you know what the project will actually cost. Lenders typically want an itemized estimate or contract anyway, and every estimate we provide is itemized so you can see exactly where the money goes. For a sense of the ranges first, see our cost guides for kitchen remodels and bathroom remodels. When you are ready, you can request a free, itemized estimate for your project, or read about our ADU and garage conversion service.