Building a home from the ground up in Texas is a different financial process than buying an existing house. When you buy a finished home in a neighborhood in Plano or Katy, a lender hands over one check at closing and you begin making mortgage payments. When you build, there is no house yet — only land, blueprints, and a plan. That single fact changes everything about how the money moves.
So how do construction loans work? In short, a construction loan is a short-term, staged financing arrangement where a lender releases money in increments as your builder finishes measurable phases of work, verifies progress with inspections, and charges you interest only on what has actually been disbursed. Once the certificate of occupancy is issued, that short-term loan either converts to a permanent mortgage or is paid off by a separate end loan.
This guide breaks down the mechanics in detail — draw schedules, interest-only payments, loan-to-value ratios, builder approval, contingency reserves, and the county-level realities across Texas that quietly shape your budget.
What a Construction Loan Actually Is ?
A construction loan is short-term financing, usually 12 to 18 months, secured by your land and the improvements planned on it. The lender is not underwriting a house — the house does not exist. Instead, the lender underwrites three things at once: you as the borrower, your builder as the party executing the work, and the project itself as represented by plans, specifications, and a line-item budget.
Because the collateral is incomplete during the entire term, construction lending carries more risk than conventional mortgage lending. That risk explains nearly every rule that follows: higher down payments, variable rates tied to the prime rate, mandatory inspections, and money released only after work is verified.
Hard Costs and Soft Costs
Your loan budget divides into two categories. Hard costs are the physical build — foundation, framing lumber, roofing, HVAC, plumbing, electrical, drywall, cabinetry, flooring. Soft costs are everything else required to make the build legal and financeable: architectural fees, engineering, permits, surveys, impact fees, title work, and construction-period insurance.
Borrowers routinely underestimate soft costs. In fast-growing suburbs across Williamson County and Denton County, municipal impact fees and utility tap fees alone can run into five figures before a single truck arrives on site. Those numbers belong in the budget from day one, not as a surprise in month four.
The Draw Schedule: How the Money Is Released
The draw schedule is the mechanical heart of construction financing. Rather than funding the full loan at closing, the lender divides the approved budget into phases and releases funds — draws — only after each phase is complete and independently verified.
A typical residential draw schedule looks something like this:
- Draw 1 — Site work, excavation, and foundation
- Draw 2 — Framing, sheathing, and roof dry-in
- Draw 3 — Rough-in mechanicals: plumbing, electrical, HVAC
- Draw 4 — Insulation, drywall, and exterior cladding
- Draw 5 — Interior trim, cabinetry, flooring, and fixtures
- Final Draw — Punch list, landscaping, and certificate of occupancy
Before each release, a third-party inspector visits the site and confirms the work claimed has genuinely been completed. The lender then funds that draw, often less a retainage percentage held back until final completion. Lien waivers from subcontractors and material suppliers are typically required as well, protecting both you and the lender from mechanics liens filed after payment.
This is why the accuracy of your original budget matters so much. The draw schedule is built directly from your line-item estimate. If your framing allowance was understated by 15%, that gap does not politely wait — it surfaces at Draw 2 and stalls the build while you find cash or request a budget reallocation. Projects in Harris County and Bexar County frequently run into this when lumber and concrete pricing shifts between bid and breaking ground.
How Interest Works During Construction
Here is where construction loans differ most sharply from a standard mortgage. During the build, you make interest-only payments, and interest accrues only on the amount actually disbursed — not the full approved loan.
If your approved loan is $500,000 but only $120,000 has been drawn by month three, you are paying interest on $120,000. As construction advances and more draws release, the balance climbs, and so does the monthly interest payment. Your obligation starts small and grows steadily toward the full amount by completion.
Construction loan interest rates are typically variable, quoted as the prime rate plus a margin. If prime shifts during a 14-month build, your payment shifts with it. This is a meaningful consideration for anyone building in a rate environment that is not stable.
The Interest Reserve
Some lenders permit an interest reserve — a portion of the loan set aside to cover interest payments during construction, so you are not paying rent or an existing mortgage while also paying construction interest out of pocket. It relieves monthly cash flow pressure but adds to your total borrowed amount. Whether it makes sense depends on whether you are carrying another housing payment during the build.
Construction-to-Permanent vs. Two-Time Close
You have two structural paths, and choosing correctly saves real money.
Construction-to-Permanent (One-Time Close)
A construction to permanent loan combines both phases into a single transaction. You close once, build, and then the loan automatically converts into a long-term mortgage at completion — commonly a 30-year fixed. One set of closing costs. One underwriting event. One credit pull.
The one-time close construction loan is generally the stronger choice for most Texas homeowners, particularly because it locks your permanent terms up front. If rates rise during your build, you are insulated. If your income or credit changes mid-project, you have already been approved.
Two-Time Close
Here you take a standalone construction loan, then apply separately for an end loan — a permanent mortgage — once the home is finished. You close twice and pay closing costs twice. You also re-qualify at the end, at whatever rates exist then.
The trade-off is flexibility. Two-time close borrowers can shop the permanent mortgage on the open market and may find better long-term terms than their construction lender offered. For borrowers with strong, stable credit and a short build timeline, that flexibility occasionally justifies the extra costs. For most, it does not.
Down Payment and Loan-to-Value Requirements
Expect to bring 20% to 25% down, though some programs go lower for well-qualified borrowers. Lenders calculate the loan-to-value ratio against the appraised value of the completed home — an appraisal after completion performed on plans and specifications, projecting what the finished property will be worth.
Land equity is the underappreciated lever here. If you already own your lot outright — common in Hays County, Montgomery County, and much of rural East Texas — that equity can count toward your down payment. A borrower who bought two acres near Wimberley five years ago may find that appreciated land covers a substantial share of the required contribution, dramatically reducing cash needed at closing.
Lenders also apply a cost-versus-value test, lending against the lower of total project cost or appraised completed value. If your build costs $600,000 but appraises at $560,000, the lender underwrites to $560,000 and the difference lands on you.
Construction Loan Requirements in Texas
Documentation runs heavier than a conventional mortgage. Assemble the following:
- Complete architectural plans and specifications
- A detailed, line-item construction budget with realistic allowances
- A signed builder contract with scope and timeline
- Builder credentials — licensing, references, financials, and completed project history
- Builder’s risk insurance and general liability coverage
- A survey and clear title commitment on the land
- Standard borrower financials: tax returns, W-2s or business returns, bank statements, credit report
Builder approval deserves emphasis. Your lender vets your builder as seriously as they vet you. A builder with thin financials, no track record, or a history of stalled projects can sink an otherwise strong application. If you are working with a smaller custom builder in the Hill Country or a regional firm around Lubbock or Amarillo, confirm early that your lender will approve them.
Owner-Builder Loans
An owner-builder loan lets you act as your own general contractor. Fewer lenders offer them, terms are tighter, and you will generally need to demonstrate legitimate construction experience. Land developers and licensed contractors building for themselves are the realistic audience. First-time builders almost always find better outcomes with an approved general contractor.
The Contingency Reserve
Nearly every construction loan requires a contingency reserve — usually 5% to 10% of the total budget — set aside for the overruns that are not a possibility but a near-certainty. Rock encountered during excavation. A change order for a redesigned kitchen. A material price jump between bid and installation.
Treat the contingency as untouchable working capital, not extra budget for a better appliance package. Projects that exhaust the reserve on upgrades in the first third of the build are the ones that stall.
Texas-Specific Factors That Shape Your Loan
Texas is not a single construction market. Costs, timelines, and lending conditions vary substantially across the state, and your loan reflects that.
Soil, Foundations, and Regional Cost Drivers
The expansive clay soils running through much of North Texas — Dallas County, Tarrant County, Collin County — often demand engineered post-tension foundations and additional geotechnical work. That is real money in Draw 1 and must be in the estimate up front. Rocky terrain across the Hill Country in Comal County and Kendall County can add excavation costs that flat coastal sites never encounter.
Coastal Requirements
Building in Galveston County, Brazoria County, or elsewhere along the Gulf Coast means windstorm certification, elevation requirements, and insurance premiums that meaningfully affect both your budget and your permanent loan qualification. These are underwriting factors, not afterthoughts.
Permitting Timelines
A build inside Austin city limits in Travis County faces a materially different permitting timeline than an unincorporated tract in Parker County or Ellis County. Since your loan term is finite, permitting delays consume the clock you are paying interest on. Extension fees are real. Build the local approval timeline into your schedule honestly.
Homestead and Title Considerations
Texas has distinctive homestead protections and constitutional provisions governing residential construction lending. Your title company and lender will navigate these, but understand that Texas construction loans carry documentation requirements — including specific timing rules and mechanic’s lien contract execution — that borrowers relocating from other states often find unfamiliar.
Construction Loan vs. Traditional Mortgage
| Feature | Construction Loan | Traditional Mortgage |
| Fund release | Draw schedule, in stages | Single lump sum at closing |
| Term length | Typically 12–18 months | 15–30 years |
| Payments during build | Interest-only on drawn amount | Principal + interest |
| Interest rate | Usually variable, prime + margin | Often fixed |
| Down payment | Commonly 20–25% | 3–20% |
| Collateral | Land + planned improvements | Completed home |
| Inspections | Required before each draw | One appraisal |
Common Mistakes That Derail Texas Builds
- Underestimating the budget. The single most damaging error. An estimate that is 10% light will surface as a funding gap at the worst possible moment.
- Omitting soft costs. Permits, surveys, impact fees, and utility connections are not rounding errors — they can total tens of thousands.
- Ignoring the timeline. Weather delays in the Panhandle, subcontractor scheduling in booming metros, and inspection backlogs all consume loan term.
- Choosing a builder your lender will not approve. Vet the builder-lender fit before signing anything.
- Spending the contingency early. Reserve funds exist for problems, not upgrades.
- Skipping lien waivers. Unwaived subcontractor claims can cloud your title after closing.
A Realistic Timeline
For a typical Texas custom home:
- Months 1–2: Plans finalized, budget assembled, loan application and underwriting
- Month 2–3: Closing, permits secured, site work begins
- Months 3–5: Foundation and framing — Draws 1 and 2
- Months 5–8: Mechanical rough-ins, insulation, drywall — Draws 3 and 4
- Months 8–11: Interior finishes, fixtures, exterior completion — Draw 5
- Months 11–13: Punch list, final inspection, certificate of occupancy, final draw, conversion to permanent financing
Add buffer. Nearly every project needs it.
Frequently Asked Questions
Can I get a construction loan with no money down?
Rarely, and generally only if you own your land outright and it carries enough equity to satisfy the loan-to-value requirement. Most Texas borrowers should plan on 20% to 25%.
What credit score do I need?
Most lenders look for 680 or higher, with the strongest terms above 720. Requirements tighten as construction risk rises.
What happens if the build goes over budget?
The contingency reserve absorbs the first tier. Beyond that, you cover the difference in cash or negotiate a loan increase, which requires re-underwriting and delays draws.
Can I make changes during construction?
Yes, through change orders — but each one affects budget, draw schedule, and possibly the appraised value the loan was underwritten against. Changes are never free.
Do I pay two mortgages while building?
If you are living in a financed home during construction, yes — your existing mortgage plus construction interest. An interest reserve can ease this.
The Bottom Line
Construction loans work by matching money to progress. Funds release in verified stages, interest accrues only on what is drawn, and short-term financing converts to a permanent mortgage when the home is finished and occupiable. The system is deliberate, inspection-driven, and rewards borrowers who arrive with accurate numbers.
Which is exactly where most projects are won or lost — long before the first draw.
Build Your Loan on Numbers You Can Trust
Every element of construction financing traces back to one document: your estimate. The draw schedule is built from it. The loan-to-value ratio is calculated against it. The contingency reserve is sized by it. When that estimate is inaccurate, the consequences arrive at the worst possible moment — mid-build, with subcontractors on site and funding stalled.
At Texas Estimate, that is precisely the problem we solve. We deliver detailed, lender-ready construction estimates and material takeoffs for residential and commercial projects across Texas — from Harris and Travis to Bexar, Dallas, Tarrant, Collin, Denton, Williamson, Montgomery, Fort Bend, and Hays counties, and every market between. Our estimates reflect real regional pricing: North Texas foundation requirements, Hill Country excavation realities, Gulf Coast windstorm specifications, and the current labor and material costs in your specific market — not national averages that fall apart on a Texas job site.
Whether you are a homeowner preparing a construction loan application, a builder bidding competitively, or a developer underwriting a project, we give you line-item accuracy that lenders trust and draw schedules can actually be built on. Contact Texas Estimate today for a fast, precise estimate — and walk into your lender’s office with numbers that hold up.