The Quick Read: A home equity line of credit (HELOC) is secured by a home you already own, not by the house you plan to build. The right provider depends on which property carries the line, how much equity it has, and whether the line is big enough for the whole budget.
- The line borrows against today’s equity. It does not borrow against the future value of the build.
- Lenders in Lendmire’s wholesale network set leverage by occupancy: a primary residence, a second home, or an investment property.
- On an investment property, the network ceiling is 70% combined loan-to-value (CLTV), with a 700 minimum score and a $500,000 maximum line.
- The strongest builds have a clear exit, such as a DSCR cash-out refinance once the rental is finished and leased.
- Lendmire is a mortgage broker. It compares wholesale lenders for you and does not lend directly.
Most people who search for “top providers” want a ranked list of lender names. This page does not give one, because the best program for your situation depends on your equity, credit, property type, and the size of the build. What follows is how these lenders actually evaluate a file, so you can tell which program fits.
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.
Can a HELOC Actually Pay for a New Build?
Yes, in one narrow case: when the equity in a home you already own is large enough to cover the whole build. The line is a second source of cash, not construction financing. It will not release money in stages, and it will not become the permanent loan on the new house.
Think about the collateral. A HELOC needs a finished property with a verifiable value. A lot with a foundation does not qualify. The new house does not exist yet, so it cannot secure anything.
A construction loan works the opposite way. It is underwritten on the projected value of the completed home, and the lender typically releases money at milestones such as foundation and framing. A HELOC is underwritten on equity that exists today. Once the line closes, you draw as needed and the lender generally does not track how you spend it.
So the real question is not which provider offers the best line for building. It is whether your existing property has enough equity, and enough borrowing room under a lender’s leverage limits, to carry the full budget.
Key Terms Defined
HELOC: a revolving line of credit secured by a home, where you borrow, repay, and borrow again within a limit.
CLTV (combined loan-to-value): your first mortgage balance plus the new line, divided by the property’s value.
Draw period: the stretch of time when you can borrow from the line, usually paying interest only.
Repayment period: the stretch after the draw period when you pay down principal and interest.
Second lien: a loan that sits behind your first mortgage, so the first lender gets paid first if the property is sold.
DSCR: debt service coverage ratio, which compares a rental’s monthly rent to its full monthly housing payment (principal, interest, taxes, insurance, and any association dues).
Seasoning: the waiting period a lender wants after you buy or finish a property before it will refinance or cash out.
How Lenders Underwrite a Line Used for a Build
A lender looks at the property that secures the line. It does not look at the house you are building. These steps follow the file from first look to approval, using the ranges that apply across the wholesale network Lendmire places files with. Every figure is subject to lender guidelines and a full file review.
Step 1: Equity and combined leverage. The lender takes the property’s value, subtracts the existing mortgage, and applies a leverage cap. The CFPB’s HELOC booklet explains that credit limits are typically set as a percentage of appraised value minus the mortgage balance. On this network the cap depends on occupancy and credit score.
- Primary residence: the ceiling reaches 90% CLTV only at a 720 score or better, and only up to a $500,000 line. At 700 or better, a line up to $750,000 is held to 75% CLTV.
- Second home: the ceiling also reaches 90% CLTV at 720 or better, with a $500,000 maximum line.
- Investment property: the ceiling is 70% CLTV, with a 700 minimum score and a $500,000 maximum line.
Lower scores step the ceiling down. On a primary residence, a 640 score typically supports 80% CLTV, and a 620 score typically supports 70%.
Step 2: Valuation. Lines at or below $500,000 ordinarily use an automated valuation with no traditional appraisal. A full appraisal is required on any line above $500,000. You can also request one. In every case the value reflects the existing structure.
Step 3: Credit and debt-to-income (DTI). The program floor is a 600 score on primary residences. Second homes start at 640 and investment properties at 700. Maximum DTI is 50%, or 45% for scores from 600 to 679. A ratio above 45% requires at least a 680 score. The lender reviews your file on the interest-only payment calculated on the maximum draw, not on what you plan to borrow.
Step 4: Title. The individual borrower or a revocable living trust must hold title. An LLC, corporation, or partnership cannot hold title on these lines. If your rental already sits in an LLC, you need a vesting change first, or a DSCR cash-out refinance instead, subject to program terms.
Step 5: Draw structure. Primary residences and second homes have two draw options. One is a 3-year interest-only draw followed by a 17-year repayment. The other is a 5-year draw followed by a 25-year repayment. Investment lines use the 5-year draw and 25-year repayment only. Pricing floats during both periods on both programs and does not convert to a fixed rate.
One feature matters a great deal for a build. At least 75% of the line is drawn at closing. That means interest starts on most of the money before the first contractor is paid. After that initial draw, any remaining line can be drawn later, and the lender generally does not track how you spend it. The CFPB’s HELOC page describes the typical draw-as-needed line, but these network programs front-load the draw. Budget for that.
Who Writes These Lines, and How to Find the Fit
Banks, credit unions, online lenders, and mortgage companies all write home equity lines. Their appetite differs on three things that matter to a builder:
- Whether they lend against a rental property at all.
- Whether they accept a line used for ground-up construction.
- Whether they will sit behind a construction lender’s first lien.
The best program for your situation depends on those answers. Some lenders limit lines to a primary residence. Investor-friendly lines exist, but they are narrower in leverage and size.
A broker’s value here is simple. Lendmire shops multiple wholesale lenders and matches your property, credit, and leverage to the program that fits. The Lendmire HELOC program is available in 16 full-service states, which is narrower than its 41-market DSCR footprint, including Washington, D.C. Lines are placed through select wholesale partners, and the lender, not the broker, approves the file.
Here is how the main funding routes compare for a ground-up rental. Note that the HELOC draws most of its balance at closing on these network programs.
| Route | Secured by | Underwritten on | How money arrives |
|---|---|---|---|
| HELOC | A home you own | Equity today | At least 75% drawn at closing, remainder as needed |
| Construction loan | The new build | Projected finished value | Staged milestone draws |
| DSCR cash-out refinance | A finished rental | Rent coverage plus equity | One lump sum |
A Worked Scenario in Percentages
Picture an investor with a primary residence and a score above 720. The first mortgage is modest, and the home supports a line at up to 90% CLTV, on a line of no more than $500,000. The investor’s build budget is the question. If the budget fits under the line cap, the HELOC can fund the whole project. If it runs past the cap, the investor needs a second source, such as a construction loan or cash from another property.
Now flip it. A different investor wants the line on a rental, not the residence. The rental caps at 70% CLTV, with a 700 minimum score and a $500,000 maximum line. Since the network ceiling on an investment property is lower than on a primary residence, the same equity produces a smaller line. A lender may also treat the DTI test differently once the new payment is added.
Neither scenario involves the new house as collateral. In both, the existing property carries the debt, and the line is sized to its equity.
Where the General Rule Breaks
The rule “the line is secured by what you already own” holds. These cases bend around it.
Thin equity. If the existing home has little equity, a HELOC leaves the budget short. A construction loan underwritten on completed value may fit better.
A teardown. If you buy a house you plan to demolish, the line is based on the old structure’s value. That means taking the line before demolition. Once the structure is gone, a lender has little to value.
The draw front-load. Because at least 75% of the line is drawn at closing, a build that spends cash slowly means paying interest on idle money. A smaller line can fit better than the maximum.
Rental collateral. Investment-property lines exist on this network, but only at the 70% CLTV ceiling and the 700 score minimum. They are narrower than lines on a primary home.
Title surprises. Lines are limited to three per borrower. A borrower who owns more than 15 financed properties is not eligible. Manufactured homes, log homes, condotels, and co-ops are not eligible collateral. Neither are commercial, mixed-use, or agricultural properties.
Recent listings. A property that was recently listed for sale can be ineligible in some states.
Past credit events. A bankruptcy needs 4 years of seasoning from discharge or dismissal. Foreclosure history splits by program: one seasons a foreclosure at 7 years and a deed-in-lieu or short sale at 4, while the other declines the history entirely.
Falling values. The CFPB notes that a lender may stop further advances if the home’s value falls significantly. A line that was approved at one value may not stay fully available through a long build.
The first mortgage. Once you have a HELOC, the CFPB notes you may need that lender’s approval to refinance your first mortgage. Plan for that before you open the line.
The Exit: Paying Off the Line With a DSCR Cash-Out
The HELOC is temporary money. After the build, you need a permanent loan on the finished property or a plan to pay the line off.
For a rental, the investor-side exit is often a DSCR cash-out refinance. 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 loan is reviewed primarily on property-level rental income covering the payment, subject to lender guidelines. Lendmire’s complete DSCR loans guide covers the mechanics.
Here is how those programs typically look across the network.
- Cash-out leverage: tops out around 75% LTV, though it varies by program.
- Seasoning: about 6 months is the common expectation, so a HELOC may have to carry the balance for a while after the build.
- Coverage: 1.00 is where many select programs start. A separate select-lender path takes coverage below 1.00, with leverage and terms adjusted.
- Credit: a 620 floor exists in parts of the network. Many programs want around 660, and 700 or better can open stronger leverage tiers.
- Loan size: up to $3,000,000 on standard programs (smaller balances available through select lenders).
- Reserves: commonly around 6 months of PITIA (principal, interest, taxes, insurance, and association dues), though they vary by lender, leverage, and loan size.
Clearing 1.00 on coverage does not mean the property cash flows. Repairs, vacancy, management, utilities, and capital expenses sit outside the calculation.
Lendmire’s piece Top Investment Property HELOC Providers for Refinancing a Balance Into a New HELOC covers the related case where the line itself needs replacing.
When a HELOC Is the Wrong Tool
Skip the HELOC if any of these describe your build.
- The budget exceeds the maximum line your equity can support.
- Your equity sits in a property held by an LLC you cannot retitle.
- You need money released in stages against inspections.
- You cannot cover the combined payments on the existing home, the new line, and the land or carrying costs.
- Your score sits below the floor for the occupancy you need.
A construction-to-permanent loan, a bridge loan, or a larger cash-out on another property may fit better.
Questions to Ask Any Provider Before You Apply
Ask each of these before you spend time on an application.
1. Does the line allow ground-up construction as a use of funds?
2. Will you lend against the occupancy type I own?
3. Can you sit behind my current first mortgage, or in first position?
4. How much of the line is drawn at closing?
5. How is DTI calculated, and on what draw amount?
6. Does a full appraisal apply to my line size?
7. What happens to the line if the property’s value drops?
A broker asks these questions across many wholesale lenders at once, which is usually the practical advantage.
Frequently Asked Questions
Can I use the new house as collateral for the HELOC?
No. A HELOC is secured by a property that already exists and can be valued today. The new house has no value to appraise until it is built.
Can a HELOC and a construction loan work together?
Yes. A line on your current home can supply cash for the equity a construction lender requires. The construction lender typically counts the line’s payment in your DTI. The combined leverage and the sequence of liens both matter, so confirm them before you open either loan.
Does a HELOC lock a fixed payment over the build?
No. The pricing floats across both the draw and repayment periods and never converts to fixed. The CFPB notes that HELOCs usually carry adjustable rates, so the payment moves with the balance.
What is the most I can borrow on a rental property?
On an investment property, the network ceiling is 70% CLTV with a 700 minimum score and a $500,000 maximum line. Primary residences can reach 90% CLTV only at a 720 score or better and only up to $500,000. A line above $500,000 is for primary residences only. It requires 700 or better (720 on the 5-year draw structure), caps at 75% CLTV, and needs a full appraisal.
What happens after the build is finished?
You pay off the line, refinance it, or keep it for a while. For a rental, a DSCR cash-out refinance is a common exit, subject to seasoning, coverage, and lender guidelines.
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. Lendmire is a mortgage broker arranging financing through select lenders in its wholesale network, and every figure here is subject to lender guidelines and full file review. This is not a commitment to lend.
About Lendmire
Lendmire (NMLS# 2371349) is a mortgage brokerage serving homeowners and real estate investors in its 16 full-service states. Home equity lines of credit are arranged through wholesale lending channels; Lendmire brokers the line and the lender underwrites each application under its occupancy-based guidelines. 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
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 for a Down Payment on Your Next Home · Top Investment Property HELOC Providers to Buy a Rental Property
Brandon Miller
Founder & CEO, Mortgage Loan Originator, Lendmire LLC
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- Lendmire LLC · Firm NMLS# 2371349 · Verify firm licensure
Required disclosures. Lendmire (NMLS# 2371349) operates as a licensed mortgage broker, not a direct lender or depository. The discussion in this article is general in nature and should not be relied upon as financial, legal, or tax advice — every investment scenario is unique and should be reviewed by a qualified professional. Any loan inquiry is subject to lender underwriting, and this article is not a commitment to lend or a guarantee of approval. Mortgage rates, loan terms, and program guidelines vary by borrower, property, and state, and may change without notice. Equal Housing Opportunity. Verify licensure at NMLS Consumer Access.