Best HELOC Program to Build a New Home

The Quick Read: The right program depends on the equity you already hold, because a home equity line is a second claim on a finished property you own, not a loan against the house you are about to build, so the strongest files pair enough equity with a clear plan to pay the line off.

• The line attaches to an existing, completed property. It does not finance a ground-up build on that build’s own collateral.
• Ceilings depend on occupancy. Investment properties top out at 70% combined loan-to-value (CLTV). Primary residences and second homes reach 90% CLTV only at a 720 credit profile or better.
• Lines run from $25,000 to $750,000. Anything above $500,000 is primary residence only.
• Interest-only draws are common, but the pricing floats and never converts to fixed.
• An investor who plans to keep the new build as a rental usually needs a different loan to take the line out afterward.

Lendmire is a mortgage broker that places these files with select wholesale lenders. It is not the lender, and every figure below is subject to lender guidelines and full file review.

What Does a Home Equity Line Do on a New Build?

It supplies cash from equity in a property you already own. It does not make the new house its own collateral.

That one fact decides the structure. Picture an owner with a paid-down primary home who wants to build on land they hold free and clear. The line sits on the primary home. The builder gets paid from the line. The new house is not the security for that line while it is still a construction site.

Now picture the reverse. A buyer closed on a home recently and has thin equity. There is little to borrow against, so a line has almost nothing to work with. A construction loan is built for that case, because it is sized to the project rather than to existing equity.

Collateral decides everything else. Equity in the existing property is the engine. The build is only what the money gets spent on.

How Underwriting Treats the Line, Step by Step

Underwriting follows a fixed order. Each step can stop a file.

1. Equity is measured. The lender takes the property value, subtracts the existing mortgage, and caps the combined balance at a percentage of value. That percentage is the CLTV ceiling.

2. Credit sets the tier. A single-bureau score, keyed to the primary wage earner, sets the maximum CLTV. The credit report must be no more than 90 days old at closing, and rescores are not allowed.

3. Debt-to-income is tested. The maximum is 50%. Profiles from 600 to 679 are held to 45%. A ratio above 45% requires at least a 680 score. The test runs on the interest-only payment calculated on the maximum draw, so a build that needs the whole line is tested at the full amount.

4. Value is established. Lines at or below $500,000 ordinarily run an automated valuation with no traditional appraisal. A higher CLTV may call for a second valuation. Every line above $500,000 needs a full appraisal, and a borrower can ask for one on any file.

5. Title is checked. The line must be held by the individual borrower or a revocable living trust.

6. The draw is set. At least 75% of the line is drawn at closing. That surprises borrowers who expected to draw as the builder bills. Interest runs on that drawn balance from day one.

The Structures and What Each Allows

Two draw structures exist on primary residences and second homes. One has a 3-year interest-only draw and a 17-year fully amortizing repayment. The other has a 5-year interest-only draw and a 25-year repayment. For a build, that is a real difference. A 5-year draw gives the project more time before principal payments start.

Investment lines use the 5-year draw and 25-year repayment structure only.

Pricing floats through both the draw and the repayment period. It never converts to fixed.

Lower credit tiers carry lower ceilings. On a primary residence, a 620 profile is held to 70% CLTV, and a 600 profile to 60%. A line above $500,000 needs a credit profile of 700 or better (720 on the 5-year-draw structure), caps at 75% CLTV, and is primary residence only.

Each line is a standalone first or second lien. A borrower is limited to three lines. An owner of more than 15 financed properties is not eligible.

Texas primary residences are homesteads, capped at 80% CLTV. They also carry a 12-day waiting period and 12-month seasoning. Texas second homes and investment properties are non-homestead and follow the standard tables. A few other states apply credit-dependent caps, and a property listed for sale in the past 60 days is ineligible in several states. Availability runs through Lendmire’s 16 full-service states only, which is narrower than its 41-market DSCR footprint.

Where the Rule Breaks: Named Edge Cases

The property is held in an LLC. LLCs, corporations, partnerships, and irrevocable, blind, or land trusts cannot hold title on this line. That is the sharpest difference from a DSCR loan. A rental already deeded to an LLC needs a vesting change first, or a DSCR cash-out instead. Many investors discover this late.

Construction is already underway. A line is generally not opened on a property that is still under construction. The collateral has to be a finished, eligible property. Overruns mid-build are usually solved with other equity, not a new line on the half-built house.

The collateral is the wrong property type. Single-family, 2-4 unit, PUD, townhome, and condominium (including non-warrantable) are eligible. Manufactured homes, co-ops, condotels, log homes, commercial, mixed-use, and agricultural-zoned properties are not. Modular factory-built homes are eligible on the 5-year-draw structure only. Units in the 2-4 range need a 640 minimum on that structure.

The credit file has history. A bankruptcy needs 4 years of seasoning from discharge or dismissal. Foreclosure history splits by program. One structure seasons a foreclosure at 7 years and a deed-in-lieu, pre-foreclosure, or short sale at 4. The other declines that history regardless of age. Investment files follow the 7-and-4 path. Tradeline and housing-history standards also differ. The 5-year-draw structure wants two tradelines seasoned 12 months or one seasoned 24, with clean housing history across all financed properties.

The line is variable. The CFPB’s HELOC explainer notes that HELOCs usually carry a variable rate, so payments can change from month to month. It also says payments are often much higher once repayment starts. The CFPB’s HELOC brochure adds that some plans require an initial draw at opening. For a builder, that is the main stress point. The full-load draw and the amortization step both land while the new house is still not producing anything.

Two payments overlap. If the old home is being sold to fund the move, the line is paid off from that sale. If it is not, both payments run until the new build is finished and financed.

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

Which Path Fits Which Borrower?

The best program for your situation comes down to three questions. How much equity does the existing property carry? How is the title held? How will the build be paid off?

Combining the two products works, but watch for covenants. A construction lender may restrict added debt during the build. Disclose the line before you sign anything.

The Investor Version: Build, Stabilize, Take It Out

Investors do not build to live in the house. They build to rent it. That changes the endgame.

A construction loan looks at whether you can make payments during the build and then refinance out. It does not look at property income. A line on a primary home is reviewed on personal income and credit. Neither one is permanent financing for a rental.

The permanent loan is usually a DSCR loan. It qualifies primarily on property-level rental income covering the payment, subject to lender guidelines. The ratio compares rent to the full monthly obligation: principal, interest, taxes, insurance, and any HOA dues.

Run it at the line stage. Say the finished rental clears roughly 1.2x. That is a decent cushion. Say it lands near 1.00x. That is where many select programs start, and it leaves little room for a missed rent month. Coverage below 1.00 is available through select lenders in the network, with leverage and terms adjusted. A separate select-lender path exists, generally for borrowers who already own a primary residence, that runs without a ratio. Those paths are the exception. Do not plan a build around them.

A cleared 1.00 is not positive cash flow. DSCR compares rent to the payment only. Repairs, vacancy, management, utilities, and capex all sit outside the calculation.

On the takeout, a cash-out refinance on a standard rental typically tops out around 75% LTV, and about 6 months of seasoning is the common expectation. Short-term-rental collateral runs lower, with cash-out around 70% LTV, a 640+ score, and about 12 months of hosting history. Loan sizes run up to $3,000,000 on standard programs (smaller balances available through select lenders). Reserves vary by lender, leverage, loan size, and transaction type, commonly around 6 months of PITIA. They step up toward 9 months on larger loans. Conservative files at modest leverage can see them waived. Most programs want a score near 660, and 700+ opens the strongest leverage tiers.

DSCR loans can carry prepayment terms. If the plan is to pay off the line with a cash-out refinance soon after, check that before choosing the purchase-side structure. A cash-out of the line is only clean if the exit is planned before the first draw.

Lendmire’s complete DSCR loans guide covers the takeout side in more detail.

What Goes Wrong on These Files

• Vesting. The property sits in an LLC and nobody checked.
• Draw assumptions. The borrower expects staged draws, but 75% of the line is drawn at closing.
• Sizing. The line covers the budget but not the overruns. A mid-project funding gap is hard to fix once the line is spent.
• No exit. There is no plan for the payoff when the draw period ends.
• Stale credit. The credit report ages past its validity window during a delayed closing, and how long that window lasts varies by file and lender.
• Overlapping debt. The old mortgage and the new line both run through the build.

Size the funding for the whole build before breaking ground. Add a contingency buffer on top.

Key Terms Defined

CLTV (combined loan-to-value): The total of all loans secured by the property, divided by its value.

Draw period: The stretch when you can borrow from the line and may pay interest only.

Repayment period: The stretch after the draw ends, when the balance amortizes.

DSCR: The rent a property earns, divided by its full monthly housing obligation.

Takeout loan: The permanent loan that pays off short-term construction or bridge financing.

Vesting: How title to the property is legally held.

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. The brokerage reaches wholesale lenders through its network, and you can reach the team at 828-256-2183.

Equity is the real budget on any build, and the investors who finish cleanly are the ones who knew their takeout before they drew a dollar.

About Lendmire

As a mortgage broker (NMLS# 2371349), Lendmire helps homeowners and real estate investors in its 16 full-service states open home equity lines of credit arranged through wholesale lenders. Lendmire is never the lender; line amounts, ceilings and terms are set by the lender under its guidelines. Scotsman Guide named Lendmire a Top Mortgage Workplace in both 2025 and 2026.

Investors who want the broader program framework can review how DSCR loans work.

References

1. CFPB’s HELOC explainer

2. CFPB – HELOC brochure