Building a house costs money in stages, and the financing product built for that reality is the construction loan. Unlike a traditional mortgage, which pays for a completed home in one lump sum, a construction loan pays contractors in installments as work progresses. The lender holds the money, inspects the site, and releases funds only when the work matches the plan. For anyone planning a custom build, understanding how these loans operate decides whether the project starts on time or stalls in escrow.
The loan covers land, permits, materials, labor, and the construction tools the crew needs on site, all drawn down against an approved budget. This article walks through the mechanics: how construction loans differ from mortgages, how draws are approved, what lenders evaluate, and what happens when the house is finished.
How a Construction Loan Differs from a Traditional Mortgage
A traditional mortgage is a long-term loan secured by a finished house. A construction loan is short-term, usually 12 to 18 months, and it carries interest-only payments during the build. The borrower pays interest only on the money actually drawn, not on the full loan amount, which keeps early payments low.
Interest-Only Payments During the Build
Interest accrues on the outstanding balance, so the first payments are small and the last ones approach the full monthly interest. Some lenders collect interest monthly from the borrower; others roll it into the draws. Either way, the rate during construction runs higher than the permanent mortgage rate because the lender takes more risk on an unfinished project. Borrowers usually pay points and closing costs up front, and the construction rate may float until the loan closes, so locking early matters when rates are climbing.
Loan-to-Cost Limits
Most lenders cap construction loans at about 85% of the total project cost, which forces the borrower to cover the rest in cash or equity. That stake protects the lender: if the project stalls, the borrower has real money at risk. Loan-to-cost ratios for construction run lower than the 90% to 97% loan-to-value ratios common on purchase mortgages.
| Feature | Construction Loan | Traditional Mortgage |
|---|---|---|
| Term | 12 to 18 months | 15 to 30 years |
| Payments during term | Interest-only on drawn amount | Full principal and interest |
| Funds released | Draws tied to inspections | Lump sum at closing |
| Rate | Higher during the build | Lower, fixed or adjustable |
| Collateral | Land and project in progress | Finished home |
The draw schedule follows the work itself, which means the loan timeline lines up with the construction project life cycle from site prep through final finishes.
How Draws Work: Inspections, Checks, and Lien Waivers
A draw is a progress payment. The contractor submits a request stating what has been completed, and the lender sends an inspector to verify it before releasing money. Draws typically happen monthly or at milestones: foundation, framing, rough-in, drywall, and finishes.
The Inspection Gate
The inspector checks that the completed work matches the draw request and the approved plans. If the foundation is half poured but the request says it is done, the draw gets adjusted. Because inspectors verify real progress, contractors learn to document work with photos and signed change orders. Most lenders hold back a retention amount, commonly 10% of each draw, and release it only after the final inspection passes.
Two-Party Checks and Lien Waivers
Most lenders issue two-party checks made out to both the homeowner and the contractor, so neither can cash the payment alone. Lenders also require a lien waiver from every contractor and subcontractor paid on a draw. The waiver releases the property from mechanic’s liens, protecting the borrower from a claim filed later by an unpaid sub.
- The contractor submits a draw request with a cost breakdown.
- The lender schedules a site inspection.
- The inspector verifies completed work against the request.
- The lender issues a two-party check after lien waivers are signed.
- Interest begins accruing on the new balance.
First-time borrowers hear the horror stories about slow draws and surprise inspections. Contractors compare lender behavior on construction industry blogs, and the same advice repeats: know the inspection schedule, keep paperwork current, and never let a subcontractor finish work without a signed waiver.
Commercial vs Residential Construction Financing
Residential construction loans fund single-family homes, duplexes, and small owner-built projects, and they usually convert to a standard mortgage at completion. Commercial construction financing works differently: larger projects, longer terms, and lenders that underwrite the developer’s track record as much as the property.
What Changes with Project Size
Commercial loans use different ratios, require more equity, and often involve a construction management team that reports to the lender. Residential borrowers deal with one builder and one inspector; commercial borrowers deal with a general contractor, a lender’s engineer, and sometimes a third-party cost consultant who audits every draw request against the schedule of values.
- Residential: smaller loan amounts, personal credit, automatic conversion.
- Commercial: larger amounts, business credit, separate take-out financing.
- Residential draws follow framing and finishes; commercial draws follow a detailed schedule of values.
The financing has to match the delivery model. Understanding how commercial construction differs from residential construction helps borrowers ask the right questions before signing.
What Lenders Evaluate Before You Close
Approval starts with the borrower’s credit and income, but the loan also stands on the project itself. The lender appraises the proposed construction based on the plans and specifications, comparing the finished value to the cost of construction. If the appraised value comes in low, the borrower must bring more cash to the table.
Plans, Specs, and the Contractor’s Bid
The appraisal depends on a complete set of drawings and a detailed cost breakdown. Lenders review the construction materials selection in the specs because the choice of windows, roofing, and finishes drives both cost and resale value. A vague spec sheet invites a low appraisal or a slow review. If the plans change after approval, the lender re-checks the numbers, so finalize the design before applying.
Borrower Requirements Checklist
- Credit score in the lender’s range, often 620 or higher for conventional programs.
- Cash reserves covering several months of interest payments.
- A licensed, insured contractor with comparable project history.
- A signed construction contract with a fixed or not-to-exceed price.
- Completed plans, specs, and a construction schedule.
Some programs, such as FHA and VA construction loans, relax parts of this list for qualified borrowers, but they add their own inspection and appraisal rules.
Scheduling the Build to Match Your Draw Schedule
Draws follow the schedule, so a realistic construction schedule keeps cash flowing. If the timeline slips, the contractor runs out of money between draws and the project stalls. Building the schedule before the first draw forces the team to think through sequencing, material lead times, and inspection windows.
Building a Draw-Friendly Schedule
Lay out the work in phases that match the lender’s milestones. A construction schedule bar chart, or Gantt chart, shows each task, its duration, and its dependencies, which makes the draw milestones visible at a glance. Tasks that block inspections, such as rough plumbing before drywall, get flagged early.
Change Orders and Contingency
Every change order shifts the budget and can delay a draw. Keep a contingency line, typically 5% to 10% of hard costs, and get lender approval before spending it. Unapproved changes can trigger a re-inspection or a revised draw amount.
Managing Costs Through the Final Draw
The last draws cover finishes, landscaping, and punch-list work, and they move slowly because small items multiply. Coordinate material deliveries so nothing arrives before the inspector clears the previous phase. Large deliveries, from lumber packages to equipment, need heavy haulage planning; a truck that cannot reach the site stalls the schedule and the draw. Track every receipt against the budget, because the final retention release depends on a clean ledger.
Closing Out the Construction Loan
When the final inspection passes and the certificate of occupancy issues, the construction loan converts to the permanent mortgage. Most conversions happen with no new closing costs because the original closing covered both loans. The permanent rate may be fixed or adjustable, set at conversion rather than at the start of construction, so the borrower’s credit and the current rate environment at completion determine the final terms.
A construction loan is a tool for managing cash flow across a project that pays out in stages, and it works best when the borrower treats the draw schedule as part of the build plan. The same discipline applies on the equipment side of the job: a site that depends on hydraulic construction equipment for excavation and concrete work keeps its own maintenance and delivery schedule, because a broken machine means a missed inspection and a stalled draw. Budget the financing, schedule the work, and document everything, and the loan does what it is designed to do: turn a pile of plans into a finished house.