Construction Loan Costs

Understanding the real costs of construction financing

Construction loans are structurally different from standard mortgages, which means the cost profile looks completely different on paper. Most people walk in expecting something similar to their home purchase loan and then get blindsided by the fee structure. The draw schedule, inspection cycles, and higher rates create a cost framework that scales with how long your project takes. That timeline variability is where things get expensive fast.

The base rate on a construction loan typically runs 200 to 400 basis points above your prime rate. Right now that puts most borrowers in the 7.5 to 10 percent range depending on credit and loan-to-value. You are paying interest during the construction phase, but unlike a standard mortgage, you are only paying interest on the amount drawn so far, not the full committed amount. That sounds better than it actually is once you factor in everything else. Origination fees sit between 1 and 2.5 percent of the total loan amount. On a $500,000 construction loan that is $5,000 to $12,500 right out of the gate. Appraisal comes next, usually $600 to $1,200, though some lenders charge more for complex projects or vacant land. Inspection fees run $150 to $350 per draw inspection, and you will go through anywhere from 3 to 8 inspections depending on the scope. That is $450 to $2,800 just for inspections. Title insurance, survey, engineering reports, and environmental assessments can add another $2,000 to $8,000 on top of everything else. Here is the part nobody warns you about upfront. Most lenders require you to pay the first 6 to 12 months of interest reserves into an escrow account before they fund the loan. On a $500,000 loan at 9 percent, that is $3,750 to $7,500 sitting in a locked account earning nothing while your project is being built. It comes back to you at closing when the construction loan converts to a permanent mortgage, but it ties up significant cash during the period you need it most.

I worked a project last year where the borrower had the rate and the origination fee locked down, but the lender required a cost to complete letter from their own approved engineer. The general contractor's specs didn't match exactly what the lender's engineer wanted, so we spent three weeks going back and forth rewriting line items. The delay cost the borrower an extra $4,200 in holding costs because every week the loan sat in draw limbo, interest was still accruing on the full committed amount even though nothing was being drawn. The workaround was finding a different lender whose engineer accepted the contractor's spec sheet without modifications, which saved about six weeks of carrying costs. It meant shopping beyond the usual two lenders most people talk to. Conversion fees are another hidden cost layer. When your construction loan transitions to a permanent mortgage, some lenders charge a modification or conversion fee between $500 and $2,000. A lot of them also require a new appraisal at conversion, which another $600 to $1,200. Some lenders will waive the conversion fee if you lock in your permanent rate before construction starts, but that locks you into their rate product for potentially six to twelve months. If rates move against you during construction, you are stuck with the higher rate or you break the lock and start over. The total cost of borrowing on a construction loan typically lands between 2.5 and 4.5 percent of the loan amount when you add everything together. On a $500,000 project that means $12,500 to $22,500 in costs before you even count the interest payments during the build. Standard purchase mortgages run closer to 2 to 3 percent total, so you are paying a meaningful premium for the flexibility and risk the lender is taking on.

One thing most calculators don't show you clearly is how completion delays compound your costs. Every month past your projected end date, you are paying interest on draws that have already been made, plus any ongoing inspection fees, plus the opportunity cost of your capital being tied up. A two-month delay on a $500,000 loan at 9 percent adds roughly $7,500 in extra interest alone. Insurance premiums, property taxes, and security costs continue during that time too. Budget for 10 to 15 percent contingency over your projected timeline, not just over your construction budget. Construction Loan Costs are difficult to pin down precisely because they depend heavily on project scope, location, lender policy, and how long things take. The fixed costs are predictable. The variable costs are where people get hurt. Interest reserves, conversion fees, inspection cycling, and timeline overruns are the items that turn a manageable budget into a stressful one. Get everything in writing before you sign, especially the inspection approval process and the conversion terms. The lender who makes it hardest during construction is not the one you want when you are trying to close on time.