How Much Can You Borrow on an Investment Property HELOC With One Unit Vacant?

The Quick Read: Usually, a vacant unit does not change the size of the line, because an investment property HELOC is sized on property value, existing liens, and your personal credit profile rather than on rent. On Lendmire’s wholesale network, an investment line tops out at 70% combined loan-to-value (CLTV) and $500,000, subject to lender guidelines. What the vacancy does change is your ability to carry the payment and, at some lenders, their occupancy rules.

• Ceiling: 70% CLTV on an investment property, with a 700 minimum credit score.
• Maximum line: $500,000 on an investment property.
• Formula: value × 70%, minus every existing lien, capped at the line limit.
• Vacancy risk: the payment keeps running while the unit sits empty.
• Titling: the line must be in your name or a revocable trust, not an LLC.

How Is the Amount Calculated?

The amount is the property’s value times the allowed CLTV, minus your existing liens. CLTV counts every loan secured by the property against its value, and Investopedia’s combined loan-to-value definition lays out the formula. Lenders generally count the full credit limit in that math, not just the drawn balance.

Here is the order a file runs in:

1. Classify occupancy. A building you do not live in is an investment property, and the 70% CLTV ceiling applies.

2. Order a valuation. Because the line cannot exceed $500,000, the file ordinarily runs on an automated valuation instead of a traditional appraisal. A full appraisal can still be requested, which helps after a recent rehab.

3. Compute CLTV. Add the first mortgage and the full proposed line, then divide by value.

4. Subtract liens and apply the cap. The result cannot exceed the $500,000 investment-line limit.

5. Underwrite the borrower. Credit, debt-to-income, title, and the first-mortgage statement drive the decision. Rent is not the qualifier.

Take a modeled fourplex valued at $800,000 with a first mortgage balance equal to 40% of value. At 70% CLTV, the line is the gap between 70% and 40%, or 30% of value, and the $500,000 cap does not bind. If the first mortgage were 55% of value, the room shrinks to 15% of value. The vacant unit appears nowhere in that math.

Does a Vacant Unit Change the Limit?

Not directly. The ceiling does not move, because rent does not set the line. Three other things do move, and they are worth separating.

Qualification. Some lenders add unit-count or occupancy policies, so it pays to ask before applying. NerdWallet notes that investment-property lines are possible but not offered by all lenders, that requirements are strict, and that the lender pool is smaller than for a primary home. On this network, single-family, 2-4 unit, PUD, townhome, and condominium properties are eligible, and an investment line still requires a 700 minimum credit score. Manufactured homes, log homes, co-ops, condotels, commercial, mixed-use, and agricultural-zoned properties are not offered.

Amount. The amount follows value and liens. A vacant unit might nudge an automated valuation, but it is not a line item in the formula.

Carrying capacity. This is where vacancy bites. The line is interest-only during the draw, so the payment does not pause when a tenant leaves. Qualification runs on the interest-only payment calculated on the maximum draw, with debt-to-income capped at 50%. Your own cash flow has to absorb it.

What Credit and Structure Apply on an Investment Line?

Investment lines carry the strictest tier on the network. The minimum credit score is 700, and 700 and 720 both reach the same 70% CLTV. A higher score buys nothing extra on an investment line. It does not raise the ceiling.

The structure is a standalone line in first or second lien position. Investment lines run a 5-year interest-only draw followed by a 25-year fully amortizing repayment. At least 75% of the line is drawn at closing. Pricing floats through both periods and never converts to fixed. Subsequent draws after closing carry a $1,000 minimum on one wholesale program, with a higher minimum in Texas.

Debt-to-income tops out at 50%, and a ratio above 45% requires a 680 score. On an investment line that second test never binds, since the floor is already 700. Exact terms depend on lender and investor guidelines, credit profile, reserves, and property review.

For context, market surveys report a different picture. NerdWallet lists at least 20% equity as a requirement and a typical ten-year draw at banks. Those are market-wide statistics, not network terms. On this network, the investment-line ceiling is 70% CLTV.

Who Can Hold Title?

Only an individual or an inter vivos revocable living trust can hold title on a home equity line. LLCs, corporations, partnerships, and irrevocable, blind, or land trusts cannot. This is the sharpest structural difference from a DSCR loan, and it matters for any investor who holds rentals in an LLC. BiggerPockets investors have long described personal-name titling and thin lender supply for this product.

A property already deeded to an LLC needs a vesting change before a line can be written. The alternative is a DSCR cash-out refinance, which can lend to an entity, subject to lender program eligibility.

Exposure limits apply too. A borrower is limited to three lines, and an investor with more than 15 financed properties is not eligible. Availability is also narrower than the DSCR footprint: the home equity product runs only in Lendmire’s 16 full-service states (AL, CA, CO, FL, GA, IN, MI, MT, NM, NC, OH, PA, TN, TX, VA, WA).

How Does the Vacancy Change the Picture for a Duplex, Triplex, or Fourplex?

The unit count changes the carrying math more than the borrowing math. Compare modeled buildings with one empty unit:

A duplex with one empty unit is the hardest to carry, since half the income disappears while the payment stays put. A fourplex absorbs the same vacancy better. None of the three changes the line a lender will size on value and liens. Also note that listing status matters: a property listed for sale, or listed within the past 60 days, is ineligible in Indiana, North Carolina, Pennsylvania, Tennessee, Texas, and Washington.

Stress-Test the Draw Before You Pull It

Run this check before drawing. Take the full interest-only payment on the amount you plan to draw. Then subtract the rent from the vacant unit. If the remaining rent from occupied units, plus your outside income, covers the payment with room left over, the draw is carryable. If not, the line is a bridge you cannot afford to cross.

Run it at two vacancy lengths: a short turnover and a stretch of several months. Remember that at least 75% of the line is drawn at closing, so the payment starts large. Because rent is not what qualifies the line, a lender will not stop you from over-drawing. That discipline is yours.

When Does a DSCR Cash-Out Refinance Fit Better?

A DSCR loan reads the property, not you. It qualifies primarily on property-level rental income covering the payment, subject to lender guidelines. A vacant unit then hits the file directly, because the empty unit’s income is part of the coverage ratio. The complete DSCR loans guide walks through how coverage works.

Here is how the two products compare on a rental with one empty unit:

On the DSCR side, many select programs start at 1.00 coverage. A separate select-lender path goes below 1.00, with leverage and terms adjusted. Cash-out refinances carry about 6 months of seasoning as a common expectation, and reserves commonly run around 6 months of PITIA, though they vary by lender, leverage, and loan size. Clearing 1.00 is not the same as positive cash flow, since repairs, vacancy, and management sit outside the calculation.

For a side-by-side on a duplex, see Lendmire’s piece on choosing between an investment property HELOC and a DSCR cash-out refinance on a duplex with one unit vacant.

Key Terms Defined

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

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

DSCR: Debt service coverage ratio, meaning rent compared with the full monthly obligation.

Non-owner-occupied: A property you do not live in, which makes it an investment property for leverage purposes.

Vesting: How title is held, such as an individual or a revocable trust.

Pre-Application Checklist

• Current first-mortgage statement and insurance declaration.
• Vesting deed showing your name or revocable trust.
• Credit report under 90 days old at closing.
• Rent roll and leases, for your own stress test.
• A list of every lien and open line on the property.

When Not to Do This

Skip the line if you cannot carry the interest-only payment through a long vacancy. Skip it if the property sits in an LLC and you do not want to re-title. Skip it if the unit is mid-renovation and you need rehab funds. A bridge or rehab loan fits that better.

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

About Lendmire

Lendmire, NMLS# 2371349, is a mortgage brokerage that arranges home equity lines of credit through wholesale lending partners in its 16 full-service states. Lines on primary residences, second homes and investment properties are each reviewed individually by the lender under the program’s occupancy, credit and combined-loan-to-value guidelines. Scotsman Guide named Lendmire a Top Mortgage Workplace in both 2025 and 2026.

References

1. Investopedia – Combined Loan-to-Value Ratio

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

3. BiggerPockets – HELOC on a rental duplex