How Construction Loans Differ from Regular Mortgages
Construction loans are fundamentally different from standard mortgages because the collateral (the house) does not exist yet. The lender is financing a promise: that a home will be built according to plans, on budget, and on schedule, and that the finished product will be worth at least the appraised value. This uncertainty drives the key differences. Construction loans are interest-only during the build phase, with funds released in draws rather than a lump sum. The rate is higher to compensate for construction risk. The lender actively monitors the project through inspections before each draw. Down payment requirements are larger. And the approval process is more complex, requiring not just borrower qualification but also review of blueprints, contractor credentials, a detailed budget, and a prospective appraisal of the yet-to-be-built home.
Breaking Down Construction Costs
Understanding construction costs helps you build a realistic budget and avoid overruns. The land typically accounts for 20-30% of total project cost, though this varies enormously by location. Hard costs (the physical construction) include site work and foundation (10-15% of construction budget), framing and exterior (20-25%), mechanical systems including plumbing, electrical, and HVAC (15-20%), and interior finishes including drywall, flooring, cabinets, and fixtures (25-35%). Soft costs include architect/design fees (5-10%), permits and impact fees (1-5%), and the construction loan interest itself. A common rule of thumb is $150-$300 per square foot for mid-range custom construction, with significant variation by region and finish level. A 2,500-square-foot home at $200/sq ft costs $500,000 in construction alone, plus land. Getting detailed bids from at least three contractors before committing to a budget provides a reality check on local costs.
Managing the Construction Draw Process
The draw process is how your construction loan funds are released. Most lenders use 4-6 draw stages tied to construction milestones. Before each draw, the lender sends a third-party inspector to verify that the work described in the draw request is complete. The inspection typically costs $100-$200 per visit, paid by the borrower. After approval, the lender releases the draw funds, usually within 3-5 business days. Your builder needs to manage cash flow around this timeline, which sometimes creates friction if subcontractors demand faster payment. Establish clear expectations with your builder about the draw schedule before construction begins. Some builders require a deposit or advance funding between draws, which should be accounted for in your project budget. Keep detailed records of all draw requests, inspection reports, and payments to avoid disputes later.
Construction-to-Permanent vs. Two-Closing Structure
The two main approaches to financing new construction are the single-close construction-to-permanent (C2P) loan and the two-closing approach. C2P loans are simpler: one application, one closing, one set of closing costs. The construction phase converts automatically to a permanent mortgage when building is complete. The rate during permanent phase is either locked at origination or set through a float-down option near completion. Two-closing structures use a separate construction loan followed by permanent financing from a different lender. This approach is more complex and expensive (two sets of closing costs, two applications), but it offers flexibility: you can shop for the best permanent rate when construction is nearly complete, and you are not locked into one lender for both phases. For most borrowers building a primary residence, C2P is simpler and cheaper. For investors or those building in uncertain rate environments, the two-closing approach may provide better permanent financing options.
Common Construction Loan Pitfalls
The most expensive mistake is inadequate budgeting. Cost overruns of 10-20% are common in custom construction, and the borrower (not the lender) funds the difference. Build a 15% contingency into your budget from day one. The second pitfall is choosing the wrong builder. Verify that your contractor is licensed, insured (general liability and workers compensation), and has a track record of completing projects on time and on budget. Ask for references and visit previous projects. The third pitfall is underestimating the timeline. Permit delays, weather, material shortages, and subcontractor scheduling issues routinely extend projects by 2-4 months. If your construction loan term is too short, extension fees add unnecessary cost. Plan for a 12-month build even if your contractor estimates 9 months. Finally, be prepared for the gap between your construction interest payments and your permanent mortgage payment. The permanent payment will be significantly higher because you are paying principal and interest on the full loan amount rather than interest-only on partial draws.