The Quick Read: The best provider for your situation depends on one gatekeeper: your construction lender. That lender decides whether borrowed money counts as your down payment. A HELOC (home equity line of credit) works only when the line, the collateral, and the stacked payments all hold up through the build.
- A HELOC is underwritten to you and the property that secures it, not to the project you are building.
- Approval on the line does not bind the construction lender. Ask that lender first.
- On Lendmire’s network, an investment property line is capped at 70% CLTV (combined loan-to-value) and requires at least a 700 credit profile.
- Primary-residence and second-home lines can reach 90% CLTV, but only at a 720-or-better credit profile.
- During the build there is no rent, so every payment comes from your income or reserves.
Why There Is No Honest “Top Five” List
Lender roundups look tidy. They are also the wrong tool for this job.
How large a line the equity supports.
An equity line is sized by combined loan-to-value, occupancy, and credit — not by rental coverage. Switch the occupancy or the credit band and the ceiling moves with it.
Investment-property lines require a 700 minimum credit score; second-home lines start at a 640 minimum and primary-residence lines at 600, and the combined-LTV ceiling steps down as the credit band drops on primary-residence and second-home lines and holds on investment-property lines; the line cap steps down on primary-residence lines and holds at every tier on investment-property and second-home lines.
A debt-to-income ratio above 45% requires 680+ credit. Profiles under 640 are limited to single-family homes. At least 75% of the approved line is drawn at closing. Ceilings, floors, and caps update from Lendmire’s centralized guideline source.
Line estimate
Illustrative estimate only — not a quote, Loan Estimate, approval, or commitment to lend. The rate is an editable assumption; equity-line pricing is variable through both the draw and repayment periods and never converts to fixed. Occupancy and credit drive the ceiling together: an investment property tops out at 70% combined LTV (minimum credit 700, line cap $500,000); a second home tops out at 90% combined LTV (minimum credit 640, line cap $500,000), with the ceiling stepping down as the credit band drops (the cap holds at every tier); a primary residence tops out at 90% combined LTV (minimum credit 600), and its $750,000 maximum line is available only at 75% combined LTV or below with a 700-or-better credit profile (720 on the longer-runway program) and a full appraisal. Lines above $500,000 require a full appraisal. Credit, debt-to-income, property type, and full underwriting review all affect the final line.
The best HELOC for a construction down payment depends on your collateral, credit profile, combined leverage, and what your construction lender will accept. A ranked list of company names cannot see any of that. It also goes stale the moment a lender changes a guideline.
Lendmire is a mortgage broker, not a lender. It works with a network of wholesale HELOC lenders and matches a borrower’s scenario to a program. So this article does not rank companies. It shows what these lenders look for, how their programs work, who fits, and what to prepare.
Here are the criteria that decide which provider fits you:
- Collateral type. Your primary home, a second home, and a rental sit in very different leverage tiers.
- Credit profile. Leverage steps up with the score. The top tier is narrow.
- Combined leverage. The line plus your first mortgage must fit under the CLTV cap.
- Line size and draw structure. How much interest-only runway you get matters when a build runs long.
- How you hold title. Some collateral cannot be used at all.
- Whether the construction lender will take the money. This overrides everything else.
Can a HELOC Really Be the Down Payment on a Construction Loan?
Sometimes. It is the construction lender’s call, and no universal rule says yes or no.
Construction loans pay out in stages, called draws, as the project passes inspections. Your own cash, or HELOC money, usually goes in first. Lender draws follow. So the lender cares a great deal about where your first dollars came from.
Some lenders will accept a HELOC-funded down payment. Others will not. A calculator-site explainer on HELOC down payments notes that individual lenders can restrict or ban HELOC-sourced funds even when broader guidelines allow them. Treat that as a reason to ask, not as a verdict.
Some construction lenders want the down payment to be unborrowed equity. Others treat a documented draw like any other source of funds. You do not know which kind you have until you ask. Ask before you open the line, not after.
If you already own the lot, there may be a simpler path. Many construction lenders credit equity in land you own toward the down payment. Land equity is not borrowed money, so it can sidestep the source-of-funds question. If the lot carries a loan, only the net equity counts.
How the Money Moves, Step by Step
Here is the sequence from first call to exit. Each step sets up the next one.
1. Get the construction lender’s ruling. Ask whether HELOC proceeds count as your equity contribution. Ask what documents it wants and how it treats the HELOC payment in your debt picture.
2. Check your equity. A HELOC limit is generally built from a percentage of the home’s value, minus what you still owe. The federal consumer finance agency’s HELOC booklet explains that sizing logic.
3. Open the line. The HELOC is underwritten to you: credit, debt-to-income ratio, and the collateral property.
4. Draw and document. Expect to show the HELOC statement, the deposit into your account, and the transfer to closing. A clean paper trail matters. Ask whether the construction lender wants the funds to sit in your account before it counts them.
5. Close the construction loan and begin draws. Your money goes in first. Then the lender’s draws follow inspections. Interest accrues on the drawn balance, so the payment grows as the build advances.
6. Carry the stack. You now pay the HELOC, the construction interest, and any mortgage on the collateral property.
7. Exit. The construction loan converts or is refinanced. For a rental, that is often a DSCR loan. The HELOC stays outstanding until you pay it from cash flow, a refinance, or a sale.
One wrinkle shapes step three. On Lendmire’s network, at least 75% of the line is drawn at closing, on both programs. That means interest starts on most of the line immediately. If your construction loan is months away, you carry that cost the whole time. Time the line to the project, not to your enthusiasm.
What the HELOC Side Looks Like on Lendmire’s Network
Lendmire arranges these lines through select wholesale partners. The network holds two programs. One is a higher-leverage program, with a 3-year interest-only draw and a 17-year repayment period. The other is a longer-runway program, with a 5-year draw and a 25-year repayment period. Every figure below applies only within its own program’s terms and remains subject to lender guidelines and full file review.
| Collateral | Credit floor | Max CLTV (top tier) | Max line |
|---|---|---|---|
| Primary residence | 600 | 90% at 720+ | $500,000 at 90% CLTV; $750,000 at 75% CLTV, 700+ (720 on the longer-runway program) |
| Second home | 640 | 90% at 720+ | $500,000 |
| Investment property | 700 | 70% at 700+ | $500,000 |
Some details matter more than the headline ceilings:
- The 90% ceiling is narrow. On a primary residence it exists only at a 720-or-better credit profile, on lines up to $500,000. A 700 profile is capped lower. On a primary, 700 to 719 reaches 85% up to $500,000, or 75% up to $750,000.
- Lines above $500,000 are primary-residence only. They need a credit profile of 700 or better (720 on the longer-runway program), cap at 75% CLTV, and require a full appraisal.
- Line size runs $25,000 to $750,000. Lines at or below $500,000 ordinarily use an automated valuation instead of a traditional appraisal. A higher CLTV may call for a second valuation.
- Pricing floats. It moves across both the draw and repayment periods and never converts to fixed. That is a real exposure if your build runs over schedule.
- Debt-to-income tops out at 50%. It is 45% for profiles from 600 to 679. The lender reviews your file on the interest-only payment at the maximum draw, not on what you plan to borrow.
- Three lines is the limit. Combined exposure caps at $2,000,000 on the higher-leverage program and $750,000 on the longer-runway program. A borrower with more than 15 financed properties is not eligible.
- Availability is narrower than the DSCR footprint. These lines are offered only in Lendmire’s 16 full-service states, while its DSCR investor loans reach 41 markets, including Washington, D.C.
Another pointer: a HELOC can serve as a second-lien or first-lien standalone line. That matters if the collateral property has no mortgage.
Which Funding Source Fits Which Borrower
A HELOC is one option among several. This table compares them by structure, not by company.
| Source | Best fit | Watch for |
|---|---|---|
| HELOC on your primary home | Strong credit, real equity | Variable payment, home at risk |
| HELOC on a rental | Equity in a rental you hold personally | Tighter leverage and credit tier |
| Land equity | You already own the lot | Net equity only if the lot has a loan |
| DSCR cash-out on a rental | Rental with strong coverage | Cash-out leverage caps and seasoning |
| Plain savings | Any borrower | Opportunity cost |
Match the source to the weakest link in your file. If your credit sits at the edge of a tier, land equity or savings may beat a line. If your rental is held in an LLC, a HELOC is off the table and a cash-out refinance may be the route.
Where the General Rule Breaks
The basic idea is simple. Borrow against equity you already have, then use the cash to build. These edge cases are where it stops being simple.
The construction lender refuses borrowed funds. Then the line is useless for this purpose. You have paid to open a line you cannot use. This is why the ruling comes first.
The line gets frozen or reduced mid-project. The federal consumer finance agency’s HELOC explainer says a lender might stop further credit if your home’s value falls significantly. You may not get as much as you expected. Draw what you need for the down payment before you start building.
The draw period ends before the exit. The same agency explains that after the draw period you enter repayment, and payments often step up significantly. In some cases the whole balance comes due. A build that runs long can collide with that date. On Lendmire’s network, the 3-year draw is a shorter runway than the 5-year draw. Pick the structure that outlasts a realistic schedule, not the optimistic one.
The rental is held in an LLC. LLCs, corporations, partnerships, and irrevocable, blind, or land trusts cannot hold title on these lines. Only the individual borrower or a revocable living trust can. A property already deeded to an LLC needs a vesting change, or a DSCR cash-out instead.
The collateral is the wrong property type. Manufactured homes, co-ops, condotels, log homes, commercial, mixed-use, and agricultural-zoned properties are not eligible as collateral.
The thing you are building is not eligible for DSCR. Manufactured homes, log homes, and barndominiums are not offered in the DSCR network. If your build is one of these, the exit plan changes before you start.
Borrowed funds and reserves. A construction lender may accept borrowed money for the down payment and still question it as reserves. Ask both questions separately.
The collateral is for sale. On this network, a property listed for sale, or listed within the past 60 days, is ineligible in several states. Take it off the market well before you apply.
The Carrying Cost Problem
The hard part is not getting the money. It is carrying it.
An investor discussion on BiggerPockets points out that the new property has to cash flow its own mortgage plus the line of credit. That is the right test. With a build, the second half of it is brutal, because the property earns nothing until it is finished and leased.
So the build window carries three costs at once:
- the HELOC payment, which is often interest-only during the draw;
- construction interest on funds drawn to date;
- any mortgage on the collateral property.
Both the HELOC and construction interest can move. Your income or reserves must cover the gap, with margin for a delay. Run the stress test with a late finish and higher pricing, not the base case.
There is a second layer at the exit. A DSCR (debt service coverage ratio) loan compares the rent to the property’s own payment: principal, interest, taxes, insurance, and any HOA dues, together called PITIA. It does not see your HELOC payment. Many programs start at 1.00 coverage, and stronger ratios open better terms. Clearing that ratio does not mean positive cash flow. Repairs, vacancy, management, and utilities sit outside the calculation.
So the finished rental can pass DSCR while you still feel squeezed by the HELOC. Test your personal cash flow separately. Lendmire’s complete DSCR loans guide walks through the coverage math in detail.
On the purchase side, most DSCR files land at 75% to 80% LTV, with select programs reaching 85% at roughly a 700+ score. Cash-out refinances top out around 75% LTV across most of the network, and about six months of seasoning is the usual expectation. Those figures are typical ranges, not promises. They shift by lender, property, and borrower. Final terms depend on the lender’s guidelines, the property type, and the borrower’s complete credit picture.
The Leverage Trap
Using a line for the whole down payment can leave you with no equity in the new property from day one. The same discussion notes you are essentially borrowing the full value. That is fine in a rising market, and painful in a flat one.
Combined leverage is the number to watch. Add the first mortgage on the collateral, the HELOC, and the construction loan. Then ask what a modest drop in value does to each. A lender can restrict a line when value falls. Even a larger down payment does not remove leverage caps, credit floors, or reserve rules. The strongest files have enough equity and enough rental coverage.
Key Terms Defined
HELOC: A revolving line of credit secured by a property you own. You borrow, repay, and borrow again during the draw period.
CLTV (combined loan-to-value): Every loan secured by the property, added together, divided by its value.
Draw period: The stretch when you can borrow and often pay interest only.
Repayment period: The stretch after the draw period when principal and interest are both due, and the payment steps up.
Construction draw: A staged payout from the construction lender as inspections are passed.
Source of funds: The documented origin of your down payment. Borrowed money is a source some lenders question.
DSCR: A property’s monthly rent divided by its PITIA. It measures whether rent covers the property’s own payment.
Questions to Ask Your Construction Lender Before Opening the Line
- Do you accept HELOC proceeds as my equity contribution?
- Do you want the money in my account before you count it? What paperwork do you need?
- How do you count the HELOC payment in my debt-to-income ratio?
- What combined leverage do you allow across the collateral, the line, and your loan?
- Will you count the funds toward reserves, or only toward the down payment?
- Does land I own count toward the down payment?
- What happens if the build runs past the schedule?
Bring the answers to your broker. They tell it which programs to look at.
Frequently Asked Questions
Does a HELOC payment count against me when I apply for the construction loan?
Usually, yes. A HELOC is a second mortgage on top of your first, so the payment shows up in your debt picture. On Lendmire’s network, a HELOC is qualified on the interest-only payment at the maximum draw, with debt-to-income capped at 50%. A construction lender runs its own calculation, so ask how it counts the payment.
Can I use a HELOC on a rental property for this?
Often yes, if you hold the rental personally or in a revocable living trust. On Lendmire’s network, an investment property line requires at least a 700 credit profile, caps at 70% CLTV, and tops out at $500,000. A rental held in an LLC cannot be the collateral. All of that is subject to lender guidelines.
Is a HELOC better than a home equity loan for this?
It depends on timing. A home equity loan delivers a fixed lump sum, while a HELOC is a revolving line whose payment varies with the balance, as the federal consumer finance agency’s comparison page explains. Because most of a line is drawn at closing on Lendmire’s network, the two behave more alike than you might expect.
What if I already own the land?
That may be your best down payment. Many construction lenders credit lot equity toward the down payment, and it is not borrowed money. You may need less from a HELOC, or none.
Will a DSCR loan take out the construction loan?
It can, for a finished rental that qualifies. DSCR loans qualify primarily on property-level rental income covering the payment, subject to lender guidelines. The finished property must be a type the network offers. Manufactured homes, log homes, and barndominiums are not offered.
The 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. Start with your construction lender’s answer on borrowed funds. Then bring that answer to the table.
About Lendmire
Lendmire — NMLS# 2371349 — is a mortgage broker that arranges home equity lines of credit in its 16 full-service states through wholesale lenders, on primary residences, second homes and investment properties. Every line is subject to the lender’s guidelines and full underwriting. Scotsman Guide named Lendmire a Top Mortgage Workplace in both 2025 and 2026.
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Informational only. Not a Loan Estimate, approval, or commitment to lend. Program availability and eligibility are subject to lender guidelines, credit approval, property review, and underwriting.
References
1. A calculator-site explainer on HELOC down payments
3. The federal consumer finance agency’s HELOC explainer
4. BiggerPockets – Using a HELOC for down payment or full purchase
This article is part of Lendmire’s HELOC & home equity loan program — full qualification details, guidelines, and scenarios live on the program page.
Related reading: Top DSCR HELOC Providers for Using Rental Equity to Buy Another Rental · Top DSCR HELOC Providers to Cover a Down Payment Shortfall on an Investment Property · Top DSCR HELOC Providers on a Rental Held in an LLC
Brandon Miller
Founder & CEO, Mortgage Loan Originator, Lendmire LLC
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Compliance and disclosures. Lendmire (NMLS# 2371349) is a licensed mortgage broker and is not a direct lender, depository institution, financial advisor, or tax professional. Content in this article is general market analysis and educational information — not financial, legal, or tax advice for any specific situation. Lendmire does not guarantee loan approval; every transaction is subject to underwriting by the funding lender. Mortgage pricing and loan program guidelines are subject to change at any time without notice and vary by borrower characteristics, property type, and state regulations. Lendmire complies with Equal Housing Opportunity. Licensure verification: NMLS Consumer Access.