Top HELOC Providers Behind Your Existing Mortgage

The Quick Read: A HELOC behind your existing mortgage is a second lien that sits in line after your first loan, and the lenders that write one depend on your property type, credit profile, and combined leverage, so the useful question is which type of provider fits your file rather than which single name ranks first. This article does not rank lenders. It explains who writes these lines, how the sizing math works, and where the rules change by occupancy.

• A second-lien line leaves your first mortgage exactly as written. It only adds new borrowing behind it.
• The limit is value times a combined-loan ceiling, minus what you owe on every existing lien.
• On an investment property, the network Lendmire works with tops out at 70% combined leverage with a 700 minimum score.
• Primary residences and second homes can reach higher ceilings, but only at stronger credit tiers.
• When a home equity line does not fit, a DSCR cash-out refinance is the usual alternative for a rental.

Who Actually Offers a Second-Lien HELOC?

Three kinds of providers write lines behind an existing mortgage: depository lenders such as credit unions and regional banks, online lenders, and wholesale programs reached through a mortgage broker. Each has different appetite for rentals and second homes. Your first-mortgage servicer is not automatically one of them.

Because appetite differs so much by provider type, a national “top providers” list is not useful. Appetite changes with property type, occupancy, and the lender’s own risk limits. A line that one desk declines may be a routine file at another.

The brokerage model matters here. Lendmire is a mortgage broker, not a lender. It places HELOC files with select wholesale partners and matches a scenario to the program that fits it, rather than steering every borrower to one desk.

What “Behind Your Existing Mortgage” Means

A HELOC behind your mortgage is recorded as a second lien. Your first mortgage keeps its balance, payment schedule, and terms. Nothing about it is rewritten, and that is the main reason investors choose this route over a cash-out refinance.

The new line gets paid second if the property is sold or foreclosed. That is why lenders cap the combined balance of all liens against the home’s value. On this network a line can also sit in first-lien position, but this article is about the second-lien case.

The CFPB describes a HELOC taken on top of an existing mortgage as a second mortgage you pay in addition to your first. It also notes that these lines usually carry adjustable pricing, so the payment moves with the balance. On the network Lendmire works with, pricing floats through both the draw and repayment periods and never converts to fixed.

Key Terms Defined

Second lien: a loan recorded behind your first mortgage, paid second if the property is sold or foreclosed.

CLTV (combined loan-to-value): all liens on the property, counting the full line limit, divided by the property’s value.

Draw period: the stretch when you can borrow from the line, usually with interest-only payments.

Repayment period: the stretch after the draw ends, when the balance amortizes and no new borrowing is allowed.

DTI (debt-to-income): your monthly debt payments divided by your monthly income.

Vesting: how title to the property is held, such as in your own name, a trust, or an LLC.

How the Limit Is Sized, Step by Step

The formula is simple: property value times the CLTV ceiling, minus the balance on every existing lien. The line limit is counted in full, not just the amount you draw. Your first mortgage’s balance and payment count in the math. Its terms do not.

The CFPB’s HELOC booklet describes the same logic: lenders set the limit as a percentage of the home’s value, then subtract what you still owe on the mortgage.

Here is a worked example using percentages only. Assume a home valued at 100 units, a first mortgage equal to 50% of that value, and a 70% CLTV ceiling. The ceiling is 70 units, and 70 minus 50 leaves lien room of 20 units, or 20% of value.

The second row shows why a low valuation shrinks a line instead of necessarily ending the file. Every point of lost value removes 70% of that point from your lien room. Lines at or below $500,000 ordinarily use an automated valuation rather than a full appraisal, and a borrower may request a full appraisal in any case. Every line above $500,000 requires one.

What the Network’s Ceilings Look Like by Occupancy

The ceiling depends on how the property is used. Quoting one number for all properties would mislead, so here are the tiers across the wholesale network, subject to lender guidelines and full file review.

The primary-residence maximum of $750,000 applies only at 75% CLTV and a 700-plus profile. The 90% ceiling on a primary or second home applies only at a 720-or-better profile on a line up to $500,000. A primary-residence line above $500,000 needs a 700 score or better (720 on the longer-runway structure), caps at 75% CLTV, and requires a full appraisal. On an investment property there is no tier above 70%.

Experian says lenders typically cap allowable LTV at 80% on these lines. On the network Lendmire works with, the investment-property ceiling is 70% CLTV. A higher score does not lift it.

How Underwriting Treats the Line

A standard HELOC underwrites the borrower, not the rent. The lender reviews credit, debt-to-income, and the property itself.

1. Credit. The network uses a single-bureau score keyed to the primary wage earner. The report can be no more than 90 days old at closing, and there are no rescores. Programs differ on tradeline and housing-history standards, so read the specific guideline for your file.

2. DTI. The maximum is 50%, and 45% for scores from 600 to 679. A ratio above 45% requires a 680 minimum. The lender reviews your file on the interest-only payment calculated on the maximum draw, not on your current balance.

3. Derogatory history. A bankruptcy needs 4 years of seasoning from discharge or dismissal. Investment files follow a 7-year path for foreclosure and 4 years for a deed-in-lieu, pre-foreclosure, or short sale. On primary residences and second homes, one program applies those same periods while the other declines foreclosure-family history regardless of age.

4. Exposure. A borrower is limited to three lines, and an investor with more than 15 financed properties is not eligible.

5. Valuation and title. The valuation rules appear above. The lender also needs clear title and proof of insurance on the property.

This is a different test from a DSCR loan. A DSCR loan is reviewed primarily on property-level rental income covering the payment, subject to lender guidelines. A HELOC reviews you personally. Investors with many properties and heavy existing debt often hit the DTI ceiling on a HELOC before the equity runs out.

Structure: Draw Period, Repayment, and What Gets Drawn at Closing

Investment-property lines run one structure: a 5-year interest-only draw followed by a 25-year fully amortizing repayment. Primary residences and second homes have two options. One is a 3-year draw with 17-year repayment, and the other is a 5-year draw with 25-year repayment.

At least 75% of the line is drawn at closing on these programs. That surprises borrowers who expect a mostly undrawn reserve. If you want a small safety line, this is not that product. The minimum draw after closing is typically $1,000, with Texas at $4,000 on the program that states one.

Line sizes run from $25,000 to $750,000, and Michigan’s floor is $10,000. Because the line is secured by the property, falling behind on it puts that property at risk. On a rental, the collateral at risk is the rental itself.

Where the General Rule Breaks

Several edge cases change the answer for investors in particular.

LLC title. The network’s HELOC programs require the property to be held by you individually or in a revocable living trust. LLCs, corporations, partnerships, and irrevocable, blind, or land trusts cannot hold title. A rental already deeded to an LLC needs a vesting change or a DSCR cash-out refinance instead, subject to lender program eligibility.

Moving a mortgaged rental into an LLC. Doing so without written consent from both your first-lien lender and the HELOC lender can give either one grounds to freeze the line or demand payoff. Talk to your attorney first.

Property type. The network covers single-family homes, 2-4 units, PUDs, townhomes, and condos, including non-warrantable condos. Manufactured homes, co-ops, condotels, log homes, commercial, mixed-use, and agricultural zoning are not offered. Modular factory-built homes are eligible on one program only. Two to four units on the longer-runway structure need a 640 minimum.

Listed for sale. A property listed for sale, or listed within the past 60 days, is ineligible in Indiana, North Carolina, Pennsylvania, Tennessee, Texas, and Washington.

Texas. The 12-day waiting period, one-lien-at-a-time rule, and 12-month seasoning bind primary residences only. Texas second homes and investment properties are eligible as non-homestead transactions. Texas properties are limited to 10 acres.

Availability. HELOC placement runs only in Lendmire’s 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 the brokerage’s 41-market DSCR footprint.

Same Lender or a New One?

Your first-mortgage servicer may offer a line, but it is not required to write one on a rental. A same-lender line can be convenient. A new second-lien lender does not need to be the company that holds your first mortgage, because the first loan stays as written and only the balance and payment count.

The tradeoff is cost. A low-cost first mortgage paired with a more expensive second can still blend into a higher overall cost than a single refinance, so compare the total picture. The acquired property’s cash flow may offset some of that, but that depends on the deal.

Drawing on the line to buy another rental adds a lender question. The purchase lender decides whether borrowed down-payment funds are acceptable, so confirm that before you draw. The exit plan also needs to work: if you plan to refinance into a long-term loan that repays the line, that loan must be large enough to clear the balance.

When a HELOC Is the Wrong Tool

A second lien needs room. If the first mortgage already uses most of the allowable combined leverage, the line comes out small or does not exist. A score under 700 removes investment properties from the network’s HELOC lineup entirely, because the investment minimum is 700.

In those cases, a DSCR cash-out refinance is one alternative for a rental. It replaces the first mortgage, so the whole balance reprices. It also qualifies primarily on property-level rental income covering the payment, subject to lender guidelines. Across the wholesale network, cash-out on a standard rental tops out around 75% LTV with about 6 months of seasoning. Short-term-rental collateral is lower, at 70% on a cash-out. Loan sizes run up to $3,000,000 on standard programs (smaller balances available through select lenders).

On coverage, 1.00 is where many select programs start, and a separate select-lender path takes coverage below 1.00 with leverage and terms adjusted. Credit floors range from 620 in parts of the network to roughly 660 on most programs, and 700-plus opens the strongest leverage tiers. Clearing 1.00 is not the same as positive cash flow, since repairs, vacancy, management, and capex sit outside the calculation.

The complete DSCR loans guide walks through those structures in more detail.

What to Prepare Before You Ask

Gather these before you talk to any provider:

• Your current first-mortgage balance and payment, plus a rough view of the property’s value.
• A credit report check, since the network pulls one score tied to the primary wage earner.
• How the property is titled today, because an LLC title changes which product fits.
• Your count of financed properties and any existing home equity lines.
• Your plan for the funds, including whether a later refinance would need to repay the line.

A broker that shops multiple wholesale lenders can match these inputs to the program where the file fits, instead of you applying desk by desk. That does not guarantee a result, because every file is underwritten individually.

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 brokerage at 828-256-2183 or through the quote request page.

About Lendmire

Lendmire (NMLS# 2371349) is a mortgage broker. Home equity lines of credit — on a primary residence, a second home or an investment property — are arranged through wholesale lenders in Lendmire’s 16 full-service states, and every line is underwritten by the lender under its program guidelines. Scotsman Guide named Lendmire a Top Mortgage Workplace in both 2025 and 2026.

References

1. CFPB – Home equity loan vs. HELOC

2. CFPB – HELOC booklet

3. Experian

4. NerdWallet – Can You Get a HELOC on an Investment Property