HELOC Lenders for the Down Payment on a Construction Loan

The Quick Read: A home equity line can fund the down payment on a construction loan, but the construction lender decides whether borrowed money counts, so the line has to be opened first, documented as a source of funds, and sized so every lien and every payment still fits on one file. Lendmire is a mortgage broker, not a lender. It matches the equity side of the file to wholesale HELOC lenders in its network.

• Two separate lenders are involved: the one that issues the line and the one that makes the construction loan.
• On an investment property, the network’s equity lines top out at 70% CLTV with a 700 minimum credit score.
• A higher-leverage ceiling of 90% CLTV exists only on primary residences and second homes, and only at a 720-or-better credit profile.
• A ground-up build produces no rent, so the line’s payment comes from the investor’s own cash during construction.
• Borrowed funds often cover the down payment, yet reserve rules are a separate test that the construction lender applies on its own terms.

How Do HELOC Lenders Fit Into a Construction Down Payment?

The HELOC lender and the construction lender are two different companies with two different sets of rules. The HELOC lender cares about equity in an existing property. The construction lender cares about whether the build is funded, whether the borrower can carry all the debt, and where the cash came from.

A broker sits in the middle. Lendmire works with a network of wholesale HELOC lenders and matches the scenario to the program that fits. The scenario means the occupancy of the property pledged, credit profile, combined leverage and title structure. The best program for your situation depends on those inputs, not on a single headline number.

One availability point belongs up front. Lendmire’s HELOC placements run in 16 full-service states: AL, CA, CO, FL, GA, IN, MI, MT, NM, NC, OH, PA, TN, TX, VA and WA. That is narrower than Lendmire’s 41-market DSCR footprint, so the equity line and the investor loan on the finished building can sit in different state sets.

Why Construction Lenders Want Cash in the Deal

A construction loan has no finished collateral on day one, so the lender wants the borrower to have real money at risk. The down payment, or equity in land already owned, is that money. The lender looks at it alongside total project cost and the as-completed value.

The question for a HELOC is whether that cash counts. A line is open-end credit. The CFPB describes a home equity line as a line you can borrow against repeatedly up to a limit during a draw period, which could last 10 years, for example. Because it is borrowed, many construction lenders treat it as a loan and not as the borrower’s savings. Some accept it with documentation. Some limit it. Some want the line closed and funded before the application, not in the middle of it.

No universal rule covers this. The construction lender’s overlays decide, so ask them before the line is opened.

How Underwriting Treats HELOC Money, Step by Step

The sequence below is the order that keeps a file from stalling. It reflects how HELOC and construction underwriting interact, not a single lender’s checklist.

1. Confirm the construction lender’s position first. Ask whether borrowed funds are acceptable for the down payment, and whether the line must be open and drawn before the application. This one answer decides whether the rest of the plan works.

2. Size the line off the existing property. The line is secured by a property the borrower already owns, either a primary residence or a rental. Its limit is set off that property’s current value. It does not grow as the new building rises.

3. Count every lien together. The first mortgage, the new line and any land loan add up to one combined figure. That combined figure is what the equity-line lender caps. The construction loan is then sized off the as-completed value, so the two tests are separate.

4. Draw and document the source of funds. Funds should move from the line to the borrower’s account, then to the construction closing, with statements that show each step. The construction lender wants a clean paper trail from the line to the closing.

5. Test every payment at once. Borrowers must carry the existing mortgage, the line’s payment and the construction financing together. On this network, the line is qualified on the interest-only payment calculated on the maximum draw, not on the amount actually drawn at that moment.

6. Plan the exit before the build starts. After completion, most investors move into a long-term DSCR loan. The stabilized rent and that refinance are what retire the line.

On the land side, if the lot carries a loan, the lender subtracts that balance when counting land equity toward the down payment. Equity in land is not the same as equity in cash.

What the Network’s HELOC Programs Allow

Lendmire’s network offers a standalone line in first or second lien position. Two draw structures exist on primary residences and second homes: a 3-year interest-only draw followed by a 17-year repayment, and a 5-year draw followed by a 25-year repayment. Investment lines run the 5-year draw and 25-year repayment structure only. At least 75% of the line is drawn at closing, and pricing floats through both the draw and repayment periods. Every figure below is subject to lender guidelines and full file review.

A few details change how the table reads:

• Credit tiers step down. On a primary residence, a 700 profile reaches 85% CLTV up to $500,000, and a 640 profile reaches 80%. Lower tiers carry lower caps.
• Line size starts at $25,000. A line above $500,000 is primary-residence only. It requires a 700 credit profile (720 on the 5-year draw structure), caps at 75% CLTV, and needs a full appraisal.
• Valuation is often automated. Lines at or below $500,000 ordinarily use automated valuation, though a higher CLTV can trigger a second valuation. A borrower can request a full appraisal in any case.
• Debt-to-income matters. The maximum is 50%, and 45% for credit profiles from 600 to 679. The line is qualified on the interest-only payment at the maximum draw.
• Credit is read through a single-bureau score. The report must be no more than 90 days old at closing, and no rescores are allowed.

Property types matter too. Single-family homes, 2-4 units, PUDs, townhomes and condominiums, including non-warrantable condos, are eligible. Manufactured homes, co-ops, condotels, log homes, commercial, mixed-use and agricultural-zoned properties are not.

The sharpest structural difference from a DSCR loan is title. A line must be held by an individual borrower or a revocable living trust. LLCs, corporations, partnerships and land or irrevocable trusts cannot hold title, so a rental already deeded to an LLC needs a vesting change before it can back a line, or a DSCR cash-out instead, subject to lender program eligibility.

Where the General Rule Breaks

The idea that the line is just another source of cash breaks in several places.

Investment-property lines are thinner than primary-home lines. Fewer lenders write them, and the ceiling is lower. In this network an investment line stops at 70% CLTV, where a primary residence can reach higher tiers. An investor who counts on a rental’s equity should expect less room than on the owner-occupied home.

The line can change before it is used. The FTC notes that payments are due only on the amount borrowed, which is the benefit. It also warns that if a borrower does not repay as agreed, the lender can foreclose. A lender can also freeze or reduce a line if value or credit falls, which is a risk in the gap between opening it and drawing.

The draw window can end before the building does. The CFPB notes that in some cases the whole balance may be due once the repayment period starts. The 5-year draw on an investment line is long enough for many builds, but a delayed project can run into it.

The line does not equal reserves. Borrowed funds can satisfy a down payment requirement and still be excluded from reserves. An investor can clear the equity test and fail the cushion test.

Lien order can matter. A standalone line can sit in first or second position. If a DSCR or construction loan is planned behind it, the order of closing affects what each lender will accept, and the construction lender should confirm before anything is recorded.

Owner-occupant programs run on different logic. Some single-close construction-to-permanent programs for owner-occupants need no down payment. Those are not options for investors building a rental.

Business-purpose loans are reviewed differently. DSCR loans are designed for non-owner-occupied investment properties. Because they are business-purpose investor loans, they are reviewed differently from a standard owner-occupied mortgage. The equity line, by contrast, is a personal-credit product, with a debt-to-income test and a credit report.

Tax treatment varies. Tax treatment can depend on how the funds are used and how the property is held, so borrowers should keep clear records and speak with a qualified tax professional before relying on any deduction.

Down Payment Sources Compared

None of these removes the construction lender’s own leverage and reserve rules. The line is the only one that adds a new monthly obligation.

Key Terms Defined

CLTV (combined loan-to-value): All liens on a property added together and divided by its value.

Draw period: The stretch when a borrower can take money from the line, usually paying interest only.

Source of funds: The documented origin of the cash used at closing.

Interest-only payment: A payment covering only the interest on the drawn balance, with no principal reduction.

Debt-service coverage ratio (DSCR): Monthly rent divided by the full monthly payment on the loan, including principal, interest, taxes, insurance and any HOA dues.

As-completed value: The appraised value of the finished building, which sizes the construction loan.

What the Decision Looks Like in Practice

Picture an investor who owns a rental in their own name with a 700 credit profile, planning a ground-up build on a separate lot. Say the existing mortgage already sits near 55% of the rental’s value. On an investment line capped at 70% CLTV, only about 15 points of that value remain for a new line. The size of that remaining room caps what the line can contribute, and the construction lender still has to accept it as a down payment source.

Now picture the same investor with a primary residence carrying a lighter mortgage. Depending on the credit tier, that home may support a larger line, and at a 720-or-better credit profile the ceiling reaches 90% CLTV. The tradeoff is that the home becomes the collateral, which raises the stakes of a stalled build.

In both cases the line’s payment is paid from the investor’s own cash during construction. Clearing the debt-coverage test later is not the same as positive cash flow. DSCR compares rent to the monthly payment only, so repairs, vacancy, management and capital costs sit outside the calculation.

Once the building is finished and leased, a long-term DSCR loan can replace the construction financing. Select programs start at 1.00 coverage, and a separate select-lender path takes coverage below 1.00 with leverage and terms adjusted. More on how these tiers work is in Lendmire’s complete DSCR loans guide.

A larger down payment can lift the coverage ratio, but it never erases leverage caps, credit floors, reserve rules or property eligibility. Strong files clear both tests: enough equity and enough rental coverage.

Next Step

If you are considering a home equity line and want to see how the numbers work, Lendmire can help you compare HELOC options based on the property, the equity available, credit profile, combined leverage and your goals. Reach the team at 828-256-2183 or request a quote through Lendmire’s quote page. Program terms change, every file is reviewed individually, and nothing here is a commitment to lend.

About Lendmire

Lendmire is a mortgage brokerage (NMLS# 2371349) arranging home equity lines of credit — primary-residence, second-home and investment-property lines — through a wholesale lending network in its 16 full-service states. Eligibility is determined by the lender on each file. Scotsman Guide named Lendmire a Top Mortgage Workplace in both 2025 and 2026.

References

1. CFPB – What is a HELOC

2. FTC – Home Equity Loans and HELOCs