Construction Loan Guide: How to Build Your Home in 2026

Building a custom home — whether on your own land or in a custom builder's development — requires a fundamentally different loan than buying an existing home. Traditional mortgages fund a single transaction at closing; construction loans fund the building process across 6–12 months in stages. This guide explains how construction loans work, who qualifies, and the costs to expect.

What Construction Loans Are and How They Work

A construction loan is a short-term, higher-interest loan that funds a home's construction in installments called "draws." Unlike a traditional mortgage where the entire loan amount is disbursed at closing, a construction loan disburses funds as construction milestones are completed.

During construction, you only pay interest on the funds that have been disbursed — not the full loan amount. So if your total construction loan is $400,000 but only $100,000 has been drawn so far, your interest payment is calculated on $100,000.

Construction loans are short-term — typically 12 months. The expectation is that construction completes within that period, after which the loan either converts to a permanent mortgage (construction-to-permanent) or you refinance into a traditional mortgage (construction-only).

Interest rates on construction loans run 0.5–1.5% above traditional mortgage rates due to the higher risk: there's no completed asset securing the loan during construction. Once converted to a permanent mortgage, the rate steps down to standard mortgage levels.

Construction-Only vs Construction-to-Permanent Loans

Two main structures, with very different cost implications:

Construction-only loans (two-step)

A short-term loan funds construction, then must be paid off when construction completes — usually by refinancing into a permanent mortgage. This means two separate closings, two sets of closing costs, and two separate underwriting processes.

Reasons to choose construction-only: better permanent loan rates if rates have dropped during construction, ability to shop multiple lenders for the permanent loan, more flexibility on the permanent loan terms.

Reasons to avoid: paying closing costs twice ($5,000–$15,000 of additional cost), risk of qualifying difficulties at the second closing (income changes, credit changes), risk of higher rates if the market moves against you during construction.

Construction-to-permanent loans (one-time close)

A single loan that funds construction and automatically converts to a permanent mortgage upon completion. One closing, one set of closing costs, one underwriting.

The interest rate is locked at the start (or with a one-time relock option mid-construction). The conversion to permanent typically happens automatically — no additional underwriting, no additional approval needed.

For most borrowers, construction-to-permanent is the better choice. The savings on closing costs alone usually justify the slightly less flexibility.

Down Payment Requirements

Construction loans typically require larger down payments than traditional mortgages. Standard ranges:

Construction-to-permanent on a primary residence: 20–25% of total project cost (purchase price of land + construction costs).

Construction-only loans: 25–30% down typically.

VA construction loans: 0% down for eligible veterans (rare but available through specialized lenders).

FHA construction loans (FHA 203(b) construction): 3.5% down with strong credit, but lender list is limited.

Owner-builder construction loans: 30%+ down typical, when allowed at all.

The land itself can serve as part of the down payment if you already own it — the lender typically counts the land's value toward your equity contribution. So if you own land worth $80,000 free-and-clear and need to build a $400,000 home, the land can serve as your $80,000 (20%) down payment.

Qualification Standards

Construction loans have stricter qualification standards than traditional mortgages:

Credit score: 700+ typical minimum. Some lenders require 720+. Sub-680 borrowers will struggle to find construction lenders.

DTI: 43–45% maximum, with most lenders preferring 40% or below. Construction loans don't fit some non-QM products that allow higher DTI.

Reserves: 6–12 months of mortgage payments in reserves typical, sometimes more for larger projects.

Employment stability: Most lenders require 2+ years with current employer or in current industry.

The builder must also be approved. Lenders maintain lists of approved builders or evaluate proposed builders based on: years in business (typically 3+), references on completed projects, current insurance and licensing, financial stability, and history of completing projects on budget and on time.

Some lenders won't lend to first-time builders. Others require additional documentation: detailed construction contracts, line-item budgets, projected timelines, and contingency reserves.

The Plans, Specifications, and Budget Package

Before approval, you'll submit a complete project package to the lender:

Detailed architectural plans, including floor plans, elevations, and site plans.

Comprehensive specifications covering every material choice — flooring brands and grades, fixture levels, appliance specifications, finish selections.

Line-item budget showing exact costs for each phase: site work, foundation, framing, mechanical systems, exterior, interior finishes, etc.

Construction contract between you and the builder, including total cost, payment schedule, completion timeline, and change order process.

Builder qualifications package: references, insurance certificates, license verification.

Appraisal of the completed home based on plans ("subject-to appraisal"). The lender uses this to confirm the home will be worth at least as much as the total project cost.

If the appraisal comes in below the project cost, you may need to bring additional funds, scale back the project, or find a lender willing to lend on lower expected value.

The Draw Schedule

Construction loans disburse funds in stages tied to construction milestones. Typical 5-draw schedule:

Draw 1 (10–20%): Site preparation, foundation, basement walls. Released after foundation pour passes inspection.

Draw 2 (20–25%): Framing, roof sheathing, windows installed. Released after framing inspection.

Draw 3 (20–25%): Mechanical systems — plumbing rough-in, electrical rough-in, HVAC installation. Released after mechanical inspections pass.

Draw 4 (15–25%): Insulation, drywall, exterior finish. Released after drywall is hung and finished.

Draw 5 (15–20%): Final finishes — flooring, cabinets, paint, fixtures, landscaping. Released at certificate of occupancy.

Each draw requires lender inspection — either by a third-party inspector hired by the lender or by an in-house inspection team. Inspections verify that work is complete to the specified phase. Inspections typically cost $150–$300 each, often paid by the borrower.

Builders are paid from each draw based on the construction contract's payment schedule. Some lenders pay builders directly; others pay the borrower who then pays the builder.

Interest Payments During Construction

During construction, you pay interest only on the funds disbursed so far — not the full loan amount. This is a major cash flow advantage over taking out a traditional loan.

Example: $400,000 total construction loan, 7.5% rate. After Draw 1 ($60,000 disbursed), monthly interest is about $375. After Draw 3 ($240,000 disbursed), monthly interest is about $1,500. After Draw 5 ($400,000 fully disbursed), monthly interest is about $2,500.

These interest payments are typically funded out of pocket, not from the loan proceeds. Budget for 6–12 months of escalating interest payments during construction.

Some borrowers choose to keep their existing housing during construction (current mortgage or rent), which means they're paying for two living arrangements simultaneously. Plan accordingly — many borrowers find this period the most financially stressful.

Construction Timeline and What Causes Delays

Typical custom home construction timelines:

Tract/production build (cookie-cutter floor plans): 4–6 months.

Custom build (architect-designed): 6–10 months.

Highly custom or large home: 10–18 months.

Common delay causes:

Weather: Excessive rain delays foundation work; extreme cold delays exterior work. Plan for 2–4 weeks of weather delays in any 12-month build.

Material availability: Specific items (windows, custom cabinets, certain appliances) often have lead times of 6–16 weeks. Order early.

Trade scheduling: Skilled trades are often booked weeks in advance. A delay in one phase cascades through subsequent phases.

Permitting: Initial permits should be in hand before closing, but inspections during construction can delay progress if issues are found.

Change orders: Mid-construction changes often add weeks to the schedule, plus additional cost.

Most construction loans include a 1–6 month extension option if the project runs long. Extensions typically come with a fee (0.25–0.5% of loan balance) and require lender approval.

Cost Overruns and Contingency Reserves

Cost overruns are common in custom construction. Standard practice is to build a 10–15% contingency reserve into the loan for unexpected costs.

Common sources of overruns:

Site conditions: Unexpected rock, poor soil, drainage issues. Can add $5,000–$50,000.

Material price increases: Lumber, steel, and copper prices fluctuate during construction. A 6-month build can see material costs change 5–15%.

Change orders: Buyer-requested changes during construction ("can we add a window here?") almost always cost more than the same item planned upfront.

Code requirements: New code requirements discovered during construction can require expensive modifications.

If costs exceed the loan amount and contingency, you're responsible for the additional funds. Builders typically can't pause construction without significant cost. Always have additional reserves (10–15% of project cost beyond your down payment and closing costs) available for true emergencies.

Owner-Builder Loans: Mostly Avoid

Owner-builder loans allow the homeowner to act as their own general contractor. They're rare and difficult to obtain — most lenders won't issue them.

Why lenders are wary: a non-licensed general contractor has higher project failure rates, harder to predict timelines, and may make decisions that compromise the home's value or insurability.

When owner-builder works: experienced contractors building their own home, simple builds, smaller projects under $250,000. When it doesn't work: first-time builders, complex builds, high-end custom homes.

Costs: when owner-builder loans are available, they typically require 30–40% down, 720+ credit, and rates 1–2% above standard construction loans. Many lenders cap loan-to-cost at 70%.

Bridge Loans for Existing Homeowners

If you currently own a home and need to sell it to fund your construction, bridge loans can fill the gap. A bridge loan is a short-term loan secured by your current home, providing capital to fund the construction down payment before the current home sells.

Bridge loan terms: typically 6–12 months, interest-only payments, rates 2–4% above conventional mortgages. The expectation is that the current home sells during the bridge period and the bridge loan is repaid from sale proceeds.

Risks: if the current home doesn't sell, you're stuck paying the bridge loan, the construction loan, and the existing mortgage simultaneously. Only use bridge loans when your current home's sale is highly probable — preferably already under contract.

Renovation Loans: For Major Remodels Rather Than New Builds

Renovation loans are a related product for major home improvements rather than ground-up construction:

FHA 203(k): For purchases or refinances combined with renovation costs. Standard 203(k) for major renovations ($35,000+); Limited 203(k) for smaller projects (under $35,000). Same FHA mortgage insurance applies.

Fannie Mae HomeStyle: Conventional alternative to 203(k). More flexibility on property types and renovation types. Available with as little as 5% down for primary residence.

Freddie Mac CHOICERenovation: Similar to HomeStyle.

VA renovation loans: Available for eligible veterans, with VA's standard 0% down structure.

Renovation loans use a similar draw structure to construction loans — funds released as work progresses. The total loan is based on after-renovation appraised value, allowing you to fund renovations that exceed your immediate equity.

Working with the Right Builder

The builder is the most important variable in a successful build. Vet thoroughly:

Verify license and insurance directly with state licensing boards and insurance carriers.

Ask for and visit 3–5 completed projects. Talk to those homeowners about budget adherence, timeline adherence, communication, and warranty service.

Review the construction contract carefully (with an attorney for projects over $300,000). Pay particular attention to: change order procedures, payment schedules, completion definitions, warranty terms, and dispute resolution.

Verify the builder's financial stability. Builders go out of business — sometimes mid-project. A builder going bankrupt during your project is a financial nightmare. Get a Dun & Bradstreet report or work only with builders who provide financial references.

Avoid builders who: pressure you to skip permits, request large upfront deposits (over 10–15% of project cost), are evasive about subcontractors, or have multiple unresolved complaints with the BBB or state contractor board.

Regional Construction Cost Estimates

Construction costs vary dramatically by region. Approximate 2026 cost-per-square-foot ranges for custom home construction (excluding land):

Midwest and South (lower-cost regions): $150–$220/sqft for builder-grade construction, $220–$350/sqft for high-end custom.

Mountain West and Southwest: $200–$300/sqft builder-grade, $300–$500/sqft high-end.

Northeast and West Coast: $250–$400/sqft builder-grade, $400–$800+/sqft high-end. Custom builds in expensive markets like the SF Bay Area routinely exceed $700/sqft.

Hawaii and Alaska: 30–60% premium over mainland prices due to material shipping costs.

These ranges include only "sticks and bricks" construction. Add 10–25% for site preparation, landscaping, and finish details. Add another 10–15% for premium upgrades like high-end appliances, custom cabinetry, and luxury fixtures.

Plan your project budget conservatively — if your contractor estimates $350,000, plan for $400,000–$420,000 total cost when you include change orders, upgrades, and overruns.

Use our mortgage calculator at /mortgage-calculator to model your post-construction permanent mortgage payment. Factor in the total cost of homeownership at /tools/total-cost-of-homeownership — new construction can have higher utility costs initially, more landscape establishment costs, and the full cost of furnishing a fresh space. Building your own home is one of the most rewarding (and stressful) financial decisions you can make. Going in with eyes open on cost, timeline, and process gives you the best chance of a successful outcome.