Building a custom home in Texas is one of the most exciting things a family can do — and one of the most financially complex. Custom home financing in Texas works differently than buying an existing home, and if you walk into the process without understanding how it works, you can run into serious problems with cash flow, approval timelines, and unexpected costs. The good news is that when you understand the mechanics ahead of time, the process is straightforward and manageable. Here is what you need to know before you break ground.
How Construction Loans Work
A construction loan is not a standard mortgage. Rather than the bank handing you a lump sum at closing that you use to buy a finished house, a construction loan releases funds in stages as the home is built. Those stages are called “draws,” and they are tied to specific milestones in the construction process.
The Draw Schedule
A typical draw schedule for a custom home in Texas might look something like this:
- Draw 1: Land purchase or land equity release (if you own the land)
- Draw 2: Foundation completion and rough framing start
- Draw 3: Framing and roofing complete, windows and doors installed
- Draw 4: Rough-in mechanical, electrical, and plumbing complete
- Draw 5: Drywall, insulation, and exterior finishes complete
- Draw 6: Project complete — final inspection passed, certificate of occupancy issued
Before each draw is released, the lender sends an inspector to verify that the work claimed is actually complete. This protects both you and the bank — money is only released for real, verifiable progress on your home.
Interest During Construction
During the construction period, you typically pay interest only on the amount that has been drawn — not on the full loan amount. This means your payments start small in the early months and increase as more money is drawn. When the home is complete and you move in, the loan converts to a standard mortgage and your regular principal-and-interest payments begin.
Construction-to-Permanent Loans: The One-Close Option
The most common financing structure for Texas custom home builds is a construction-to-permanent loan — sometimes called a “one-time close” or “single close” loan. Here is why most custom home clients prefer it.
How It Works
With a construction-to-permanent loan, you close once — before construction begins. The loan starts in its construction phase (interest-only draws), then automatically converts to a permanent 15 or 30-year mortgage when the home is complete. You lock your permanent rate at the time of closing, which protects you from rate increases during the construction period.
The Alternative: Two-Close Structure
Some borrowers use a two-close structure: a standalone construction loan during the build phase, then a separate mortgage at completion. This requires two separate closings, two sets of closing costs, and does not lock your permanent rate until the second closing. It is less common in the current market but can make sense for certain financial situations — particularly if you expect your income to change significantly before completion, or if you want flexibility to shop for a better permanent rate closer to move-in.
Down Payments and Qualification Requirements
Custom home construction loans have higher down payment and qualification requirements than standard purchase mortgages. Understanding these requirements before you start designing your home will save you from sizing a project you cannot finance.
Typical Down Payment Requirements
- Most lenders require a minimum of 20% down on a custom construction loan
- Some lenders require 25–30% depending on your credit profile and the scope of the project
- If you own land that has been appraised, its equity often counts toward the down payment
- Jumbo construction loans (common for higher-end Hill Country builds) may require additional reserves
What Lenders Look At
- Credit score — typically 700 or above for competitive terms; some lenders require 720+
- Debt-to-income ratio — most lenders want total debt obligations (including the new mortgage payment) at or below 43% of gross monthly income
- Liquid reserves — cash or liquid assets beyond the down payment, typically 6 to 12 months of projected mortgage payments
- Builder credibility — lenders want to see a licensed, experienced builder with completed projects and strong references
Preparing Your Documentation
The more organized you are when you approach a lender, the faster and smoother the approval process will be. Construction loan underwriting is more complex than a standard purchase mortgage — lenders are approving both your financial profile and the project itself.
What to Have Ready
- A clear budget — a detailed line-item estimate from your builder, not a rough guess
- Preliminary plans — architectural drawings or at minimum a conceptual floor plan and site plan
- Builder documentation — contractor license, insurance certificates, completed project references, and a sample contract
- Land documentation — deed, survey, and current appraisal if you already own the land
- Construction timeline — a realistic schedule showing projected completion by phase
- Personal financial documents — two years of tax returns, recent pay stubs or business financial statements, bank statements, and asset documentation
At Ridge Rock Builders, we provide clients with the documentation their lenders need — including detailed cost breakdowns, construction schedules, and project specifications. We have worked with construction lenders throughout Central Texas and can often connect you with lenders who understand how custom projects work in this market. Read more about our process in our post on the Ridge Rock Builders approach from blueprint to move-in.
Choosing the Right Lender for a Texas Custom Build
Not every bank does construction loans well — and not every lender that offers them understands the Hill Country market. A lender who has only done urban condominium construction loans is not the right partner for an acreage build in Dripping Springs or Wimberley with a well, septic system, and a 12-month build timeline.
What to Look For in a Construction Lender
- Experience with custom residential builds in Central Texas — ask directly how many construction loans they have closed in the last two years and for what project types
- Familiarity with acreage and rural builds — properties on well and septic with long driveways and site improvements require lenders comfortable with that scope
- Clear draw process — ask how quickly draws are processed after inspection approval; delays in draws create cash flow problems for your builder that can delay the project
- Flexible terms — look for lenders willing to extend the construction period if needed without major penalties; construction timelines can shift for legitimate reasons
Community banks, credit unions with construction lending experience, and regional banks focused on Texas residential construction are typically better partners than large national banks for custom home projects. Ask your builder for referrals — a builder who has completed multiple projects in your target area will know which lenders perform well.
Planning for Contingencies and Cost Changes
Custom home construction budgets almost always change between the initial estimate and final close-out. Material prices fluctuate. Site conditions reveal surprises. Clients make changes to selections during the build. Lenders understand this, but you need to be financially prepared for it.
The Contingency Fund
Build a contingency reserve of at least 10% of your total project budget, kept liquid and available. Some lenders will require a portion of this contingency to be built into the loan itself as a “reserve” draw. Others expect it to be in your personal savings. Either way, do not go into a construction project without it.
Common Sources of Cost Changes
- Site conditions — unexpected rock, poor soil bearing capacity, or drainage challenges require additional work
- Material lead times — supply chain delays can push the schedule, which affects interest costs on the construction loan
- Design changes — changes to selections, added features, or scope expansions mid-construction are common and add cost
- Utility connections — well drilling, septic engineering, and electrical service runs from the road can vary significantly from initial estimates
Being realistic about contingencies is not pessimism — it is smart financial planning. For a detailed look at what goes into the total cost of a Hill Country build, use our free build cost estimator as a starting point.
Land Equity and Other Financing Sources
If you already own your land — or your family owns land you plan to build on — that equity can significantly reduce the cash you need to bring to closing. Lenders will order an appraisal of the raw land and credit its current market value toward your down payment requirement.
Other Funding Sources to Consider
- Cash reserves or investments — some clients finance a portion or all of the build from savings, then mortgage the completed home
- HELOC on an existing home — if you are building a new home while living in your current one, a home equity line of credit can supplement the construction loan or fund upfront costs before the construction loan closes
- VA construction loans — eligible veterans may be able to use VA financing for custom construction; not all lenders offer VA construction loans, but those that do offer compelling terms
- USDA construction loans — properties in qualifying rural areas of Texas may be eligible for USDA construction financing; income limits apply
Frequently Asked Questions
What credit score do I need to qualify for a construction loan in Texas?
Most lenders require a minimum credit score of 680 to 700 for a standard construction loan. For larger loan amounts or more favorable terms, 720 or above is typical. A score below 680 does not automatically disqualify you, but it will limit your lender options and likely result in higher rates. If your score needs improvement, it is worth taking 6 to 12 months to address it before applying.
How long does a custom home construction loan approval take?
The approval process for a construction loan takes longer than a standard mortgage — typically 45 to 60 days from application to closing, assuming your documentation is complete and the project appraisal goes smoothly. The appraisal for a construction loan is based on the completed home’s projected value (an “as-completed” appraisal), which requires detailed plans and a thorough spec list from your builder.
Can I use the land I already own as my down payment?
In most cases, yes. If you own land free and clear, its appraised value counts as equity toward the construction loan and reduces the cash you need to bring to closing. If you have a mortgage on the land, only your equity — the appraised value minus what you owe — counts toward the down payment. This is one of the most common ways clients in Spicewood, Driftwood, and other Hill Country areas structure their builds.
What happens if my construction project goes over budget?
The lender’s construction loan covers the approved project scope. If the project goes over budget, you are responsible for covering the difference out of pocket — which is why a contingency reserve is critical. Some lenders will approve a change order that increases the loan amount if your financial profile supports it and the appraisal still supports the loan-to-value ratio. Do not count on this — plan your contingency carefully.
Do I make payments during construction?
Yes. During the construction phase, you make interest-only payments on the outstanding drawn balance. Payments start small (only on the first draw) and increase as more draws are released. Once construction is complete and the loan converts to a permanent mortgage, you begin making full principal-and-interest payments at the locked rate.
How do I find a lender for a custom home build in the Texas Hill Country?
Ask your builder for referrals — experienced custom home builders work with construction lenders regularly and know which ones are responsive and reliable in this market. Regional banks, community banks, and credit unions in Central Texas tend to have more construction lending experience than large national banks. We are happy to share the names of lenders we have worked with successfully on Dripping Springs and Hill Country projects — just give us a call at (512) 294-9579.
Ready to Start Your Project?
At Ridge Rock Builders, we specialize in custom homes, remodels, barns, shops, and casitas throughout the Texas Hill Country. Whether you’re still exploring your options or ready to break ground, we’d love to talk.
Get a free build estimate or call us at (512) 294-9579 to start the conversation.