How Much Can You Borrow on a HELOC in a High-Rise With a Commercial Floor?

The Quick Read: Usually yes, if your unit is a residential condo and the building’s ground-floor retail passes the lender’s project review, because the commercial floor only decides whether the building qualifies, while the line size comes from your unit’s value, the combined loan-to-value ceiling, and what you already owe. The commercial floor is a building question, not a math question.

• The size of the line is unit value times the CLTV ceiling, minus your existing mortgage balance.
• On an investment property, the ceiling on this network is 70% CLTV with a $500,000 maximum line.
• Primary residences and second homes have a higher ceiling, but it applies only at a 720 or better credit profile.
• If you own the commercial unit, or your unit is zoned commercial or mixed-use, the line is not offered.

What Sets the Size of Your Line?

Your line equals the unit’s value times the CLTV ceiling, minus the liens already on the unit. CLTV is combined loan-to-value: your first mortgage plus the new line, divided by what the unit is worth. The ceiling depends on how you use the unit and on your credit score.

Here is how those ceilings look across the select wholesale lenders Lendmire works with. Each figure is subject to lender guidelines and a full file review.

Two details in that table matter. On an investment property, the 700 floor and a 720 score reach the same 70% ceiling, so a higher score adds no leverage there. And a primary-residence line above $500,000 caps at 75% CLTV and requires a full appraisal.

Market surveys paint a broader picture. NerdWallet reports a maximum LTV of 80% for investment-property HELOCs across the wider market, with many lenders sitting below 70%. On this network, the investment-property ceiling is 70% CLTV, and nothing sits above it. Exact terms depend on lender and investor guidelines, credit profile, reserves, and property review.

A Worked Example in Percentages

Say you own a high-rise condo as a rental. Call its value 100%, and suppose your first mortgage is 50% of that value. At a 70% CLTV ceiling, the line has room for 20% of the unit’s value. Whatever dollar figure that is, the $500,000 maximum line applies if the number is larger.

Now picture the same unit as your primary residence, with a first mortgage at 60% of value and a 720 or better profile. The room grows to 30% of value, again capped by the program’s maximum line. The same equity gives a very different line depending on occupancy.

Note one structural feature: at least 75% of the line is drawn at closing. You cannot open a large line and leave it untouched. Investment lines also run a 5-year interest-only draw followed by a 25-year repayment, and the pricing floats.

Does the Commercial Floor Shrink the Line?

No. The commercial floor affects whether your building passes the project review. It does not change the CLTV formula or the ceiling. A condo in a tower with a retail podium and a condo in an all-residential tower get the same math if both buildings are accepted.

That is why two questions run in parallel on every file. The borrower review looks at you: credit, debt load, title, and equity. The project review looks at the building. A commercial floor touches only the second one.

Expect a condo questionnaire from the building’s association. The lender compares the commercial square footage with the whole building and, in some cases, with the condo project alone. It also looks at how many units are investor-owned, how many owners are behind on association dues, the project’s reserves, and any pending litigation.

No published rule sets one commercial-space cap for these lines. Each lender sets its own project standards, so the same building can be accepted by one lender and declined by another. That is where a broker with several lenders’ guidelines in hand earns the fee: the question becomes which lender’s standards fit your building, not whether a universal limit exists.

A high commercial share can also make the building non-warrantable. Plainly, a non-warrantable condo is a project that falls outside standard agency eligibility rules, and commercial space is one common trigger. The equity lines on this network do accept non-warrantable condos for review. Review is not approval, though, and the outcome turns on the individual lender.

A building’s standing can also change over time. Under agency project guidelines, a project can lose eligibility after it was first approved if its circumstances change. Rising dues delinquency or new litigation are the kinds of changes that can trigger that.

What Counts as Commercial Space?

Ground-floor retail and offices are the classic triggers, and a hotel component is a separate problem. Lobbies and hallways vary by lender. The table below shows how common space types are usually treated, with the agency test used only as a reference point.

For contrast, the Fannie Mae Selling Guide limits commercial or nonresidential space to 35% of a project or the building it sits in, including space above and below grade. It counts rental apartments and hotels inside the project as commercial and allows commercial parking to be excluded. The 35% figure is a first-mortgage test for agency loans. HELOC lenders on this network are not bound by it, so treat it as a rough yardstick for how lenders think, not as the rule for your line.

You will also see 25%, 50%, and 60% quoted online as the commercial limit. None of them is a universal cap on a home equity line.

Four Ownership Situations

Your path depends on what you own, not just on the building. These are the four situations that come up most.

The live-work case depends on zoning. If the unit is zoned residential, it goes through the same project review as any other condo. If it is zoned commercial or mixed-use, the line is not offered, because the collateral itself is mixed-use. The same goes for commercial, agricultural-zoned, condotel, and co-op collateral.

What Lenders Check on You

The borrower side is where your own numbers decide the size of the line. Several of these rules are stricter on rentals than on a primary home, which fits NerdWallet’s note that not every lender offers investment-property lines and that lenders view default risk as higher on rentals.

• Credit: The floor is 700 on an investment property, 640 on a second home, and 600 on a primary residence. The score comes from a single-bureau model keyed to the primary wage earner.
• Debt-to-income: The maximum is 50%, and 45% for profiles from 600 to 679. The lender reviews your file on the interest-only payment calculated on the maximum draw, not just what you borrow on day one.
• Valuation: Lines at or below $500,000 ordinarily use an automated valuation. A full appraisal is required above $500,000, and you can request one in any case. For a condo, a full appraisal uses a unit-specific form that reports the commercial-space share.
• Title: The unit must be held by you personally or by a revocable living trust. An LLC cannot hold title.
• Exposure: You can carry up to three lines, and an owner with more than 15 financed properties is not eligible.

Notice what is missing: rental income. A HELOC is reviewed against credit and debt load, not on what the unit rents for. That is the sharpest difference from a DSCR loan, which qualifies primarily on property-level rental income covering the payment, subject to lender guidelines.

The line cap and the three-line limit also squeeze a growing portfolio. An investor with several rentals can reach the $500,000 maximum line or the three-line limit before the equity in those properties is used up.

When the Building or the Title Blocks the Line

If the unit sits in an LLC, the building fails the project review, or you need more than $500,000, the practical answer is usually a DSCR cash-out refinance. A cash-out replaces your existing first mortgage instead of sitting behind it. Subject to lender program eligibility, it can be written to an LLC. Whether a given building’s commercial share is acceptable for DSCR is reviewed lender by lender. Warrantable condos run standard DSCR, while non-warrantable files get case-by-case review.

Here are the typical ranges across the select wholesale lenders in Lendmire’s network, all subject to lender guidelines:

• Leverage: A cash-out tops out around 75% LTV on a standard rental and around 70% on a short-term rental. Many files want about 6 months of ownership first.
• 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, most programs want around 660, and 700 or better unlocks the strongest leverage tiers.
• Loan size: up to $3,000,000 on standard programs (smaller balances available through select lenders).
• Reserves: These commonly run around 6 months of PITIA, meaning principal, interest, taxes, insurance, and association dues. They vary by lender, leverage, and loan size.

Keep one caution in mind. Clearing 1.00 does not mean the property produces positive cash flow, because repairs, vacancy, management, and utilities sit outside the calculation. Lendmire’s complete DSCR loans guide walks through the mechanics.

The choice between the two products is mostly about what stays in place. A HELOC leaves your first mortgage alone and adds a second layer. A DSCR cash-out replaces the first mortgage and can pull more equity. NerdWallet also notes that a DSCR second mortgage may suit a property that is primarily rented.

The decision comes down to a few questions:

1. Do you want to keep the existing first mortgage in place?

2. Is the unit titled in your own name or a revocable trust?

3. Do you need more than the maximum line?

4. Does the rental coverage look stronger than your personal debt-to-income?

How Do You Check Your Own Building?

Start with the association, not the lender.

• Request the condo questionnaire and the current budget from the association or its manager.
• Ask for the commercial square footage and the total building square footage.
• Ask whether the commercial space is retail, office, parking, or a hotel component.
• Find out how many units are investor-owned and how many owners are behind on dues.
• Ask about reserves and any pending or threatened litigation.
• Confirm your unit’s zoning designation and how title is held.

With those answers, a broker can match the building to lenders whose project standards fit. It also gives you a realistic read before anyone pulls credit.

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. Lendmire is a broker that arranges financing through select lenders in its wholesale network. Its HELOC placements are limited to 16 full-service states, narrower than its DSCR footprint of 41 markets, including Washington, D.C. Reach the team at 828-256-2183 to talk through your building. Every file is underwritten individually, and nothing here is a commitment to lend.

Key Terms Defined

• HELOC: A home equity line of credit, a revolving line secured by the equity in a property.
• CLTV: Combined loan-to-value, which is your first mortgage plus the new line, divided by the property’s value.
• Project review: The lender’s check of the building itself, including commercial share, investor concentration, dues delinquency, reserves, and litigation.
• Non-warrantable condo: A condo project that falls outside standard agency eligibility rules, often for reasons like a high commercial share.
• DSCR: Debt service coverage ratio, which compares a property’s rent to its monthly payment of principal, interest, taxes, insurance, and dues.

About Lendmire

Lendmire is a mortgage brokerage (NMLS# 2371349) arranging home equity lines of credit — primary-residence, second-home and investment-property lines — through a wholesale lending network in its 16 full-service states. Eligibility is determined by the lender on each file. Scotsman Guide named Lendmire a Top Mortgage Workplace in both 2025 and 2026.

References

1. NerdWallet, HELOC on an investment property

2. Fannie Mae Selling Guide, B4-2.1-03 Ineligible Projects