Resource Guide
How to Finance a Garage Apartment in Dallas–Fort Worth
Most homeowners don't pay cash for garage apartment construction. Here are the most common financing options, how they work, and how to decide which is right for your project.
Home Equity Loan (Second Mortgage)
A home equity loan lets you borrow against the equity in your home as a lump sum, with a fixed interest rate and fixed monthly payment. It's one of the most straightforward ways to finance ADU construction.
Best for: Projects with a well-defined, fixed budget. You know what you're building, you know roughly what it costs, and you want a predictable monthly payment.
Typical loan amounts: $40,000–$300,000 depending on your equity position. Most lenders will loan up to 80–90% of your home's appraised value minus your current mortgage balance.
Current rates (2026): Home equity loan rates vary with market conditions. Check with your bank or a local credit union for current rates.
Drawback: You receive the full amount upfront and pay interest on all of it immediately, even if construction takes months.
HELOC (Home Equity Line of Credit)
A HELOC is a revolving line of credit secured by your home equity. You draw from it as needed during construction and only pay interest on what you've used.
Best for: Projects where costs will be disbursed over time. You draw as the project progresses, reducing interest costs vs. a lump-sum home equity loan.
How it works: Lender approves a credit limit. You draw during a "draw period" (typically 5–10 years) and then repay during a "repayment period." Interest rates are variable.
Drawback: Variable rate means your payment can change. If rates rise significantly, your cost increases.
Construction-to-Permanent Loan
A construction loan funds the build in stages (draws), then converts to a permanent mortgage when construction is complete. This is more complex to obtain but purpose-built for ADU construction.
Best for: Larger projects ($150,000+) where the ADU significantly increases your property value. The loan converts to a standard mortgage, which may be tax-deductible.
Drawback: More documentation required. Lender will require plans, permits, and sometimes a cost breakdown from your contractor. Not all lenders offer these products.
Cash-Out Refinance
If your current mortgage rate is similar to current market rates, a cash-out refinance can be an efficient way to access equity. You refinance your mortgage at a higher balance and receive the difference in cash.
Best for: Homeowners with significant equity and a current mortgage rate close to market rates.
Drawback: Not ideal if your current mortgage rate is significantly lower than current market rates — you'd be refinancing a favorable rate away.
ADU-Specific Lending Programs
Some lenders have developed ADU-specific loan products that take projected rental income into account when qualifying borrowers. These products are becoming more common as ADU construction grows nationally.
In Texas, a few community banks and credit unions offer programs designed for ADU financing. We can refer you to lenders we've worked with on DFW projects.