Can You Get an Investment Property HELOC on a Jointly Owned Home With a Friend or Sibling?

The Quick Read: Usually yes, but only when every person on the deed agrees to sign the lien, and only when title sits in individual names or a revocable living trust, because an investment equity line from select wholesale lenders generally cannot take a property held in an LLC. One holdout co-owner can stop the file.

• Borrower versus signer: A co-owner can often stay off the note, which means no credit pull and no personal repayment duty. That person still generally signs the lien that pledges their share.
• Network limits on an investment line: Lines run up to $500,000, with a ceiling of 70% combined loan-to-value (CLTV) and a 700 minimum credit score, subject to lender guidelines.
• Title: Individual names or a revocable living trust. LLC, corporate, and partnership title does not work on this product.
• If a co-owner refuses: Your realistic options are a buyout, a retitle, borrowing against a property you own alone, or a rent-qualified DSCR cash-out refinance.

Why Does Shared Title Change Everything?

A home equity line (HELOC) is secured by the whole property, so every owner on the deed has to agree to pledge it. Shared title turns a credit question into a relationship question. Lenders do not want to lend against a fractional interest they would struggle to sell.

Cornell Law’s Legal Information Institute explains that joint tenants each hold an undivided interest in the whole property, not a half or a third carved out of it. It also notes that when a deed doesn’t specify joint tenancy, the law presumes a tenancy in common.

An undivided interest is why “I’ll just borrow against my half” rarely works. A lien from one co-owner may attach only to that owner’s share, and a lender holding that lien would have to force a sale of a partial interest to collect. Across the wholesale network Lendmire works with, the expectation is that every titled owner signs the security instrument.

Investment lines are also a narrower product than owner-occupied ones. Yahoo Finance reports that HELOCs on investment properties are less common and harder to get than those on a primary home, and that lenders weigh both the borrower’s credit and the property’s finances. That squares with what you see in practice: fewer lenders offer them, and the ones that do are stricter.

Who Signs What? (The Table That Settles Most Arguments)

The note is the promise to repay. The lien (a mortgage or deed of trust) is the pledge of the property as security. Those are two different signatures, and co-owners often confuse them.

A friend’s strong income does not help a one-borrower file. Their income counts only if they become a co-borrower, and then their debts count too. A lien-only signer isn’t underwritten, so their credit isn’t pulled. The borrower has to carry the file alone, typically with a 700 minimum score on an investment line.

Does Signing the Lien Make Your Sibling Liable?

No. A lien-only signer isn’t personally on the hook for repayment. The risk is different and still real: if the borrower stops paying, the lender can foreclose on the property, and the non-borrowing owner’s equity goes with it.

That is the conversation to have before anyone signs. A BiggerPockets thread shows the friction clearly. An investor wanted a line in his name only, and the bank agreed. The co-owner still had to sign a document allowing the lien, and the co-owner wanted protection if the borrower died. The thread is old, so treat it as an illustration of the dynamic, not current guidance. One reply floated having the co-owner deed their share to the borrower and take a junior deed of trust back. That kind of restructuring is attorney territory.

Think of the co-owner’s position this way: they give up control without getting paid for it. A written agreement between co-owners fixes most of the resentment before it starts.

How Does Your Deed Type Change the Answer?

Deed type changes who can pledge what, but lenders still tend to want everyone’s signature either way. Check how title is actually vested before you call anyone, because the vesting decides who must sign.

Joint tenancy carries a wrinkle. Cornell’s overview of survivorship lists ways to sever a joint tenancy, including a conveyance by one joint tenant, and severance converts the tenancy to a tenancy in common. Whether a new mortgage severs survivorship depends on how your state treats mortgages. Don’t assume either answer. Ask a local attorney before signing anything that touches survivorship rights.

What Does the Network’s Investment Line Actually Allow?

An investment equity line through select lenders in Lendmire’s wholesale network is a narrow, specific product. The limits below are typical ranges, and every file is reviewed individually.

• Leverage: The ceiling is 70% CLTV on an investment property. CLTV counts your existing first mortgage plus the new line against the property’s value. A co-owner being on the first mortgage doesn’t change who signs the new lien.
• Line size: $25,000 up to $500,000 on an investment property.
• Credit: A 700 minimum. Scores above 700 don’t raise the leverage cap on investment lines, so a higher score buys eligibility, not extra room.
• Debt-to-income: Up to 50% at most, qualified on the interest-only payment at the maximum draw.
• Structure: A standalone line in first or second lien position, with a 5-year interest-only draw followed by a 25-year repayment period. At least 75% of the line is drawn at closing, and pricing floats rather than converting to a fixed figure.
• Valuation: Because an investment line tops out at $500,000, it typically runs on an automated valuation instead of a traditional appraisal, though you can ask for a full appraisal.
• Property types: Single-family, 2-4 units, PUDs, townhomes, and condos, including non-warrantable condos. Manufactured homes, co-ops, condotels, log homes, and commercial or mixed-use properties are not eligible.
• Title: Individual borrower or a revocable living trust only.
• Availability: Lendmire’s equity-line programs are offered in 16 states, which is narrower than its 41-market DSCR footprint, including Washington, D.C.

Broader market surveys paint a similar but looser picture. Rental Real Estate reports combined leverage of 70% to 80% on investment properties across the broader market, and notes that investment lines may require a full appraisal. On this network, the investment ceiling is 70% CLTV, with no higher tier.

Two Worked Scenarios

Picture two siblings who inherited a duplex. They hold title as tenants in common, and one sibling has a 720 score and wants cash for a renovation. The other sibling has thin credit. The sibling with the strong score borrows alone. The other signs the lien only and isn’t underwritten. If the existing first mortgage already uses 55% of the property’s value, the new line can use only the remaining room under the 70% CLTV cap, about 15 points. The siblings should also put in writing who pays the line, who approves draws, and what happens if one wants out.

Now say two friends bought a rental together, and one has a 690 score. On an investment line that borrower misses the 700 floor, and no lien-only signer can lend their score. The friend with the higher score could become the borrower, provided that friend reaches 700. Otherwise, adding the friend as a co-borrower brings that friend’s debts into the file and makes them personally liable. That is a big ask for a friendship.

What If Your Co-Owner Won’t Sign?

Then a whole-property line generally can’t close, and the question becomes which workaround fits your situation. You have four realistic paths.

1. Buy out the co-owner. You become the sole owner and can borrow on your own.

2. Retitle. Moving title can solve the problem, but a quitclaim deed moves ownership without releasing anyone from the existing loan. Release comes through payoff, refinance, or lender consent.

3. Borrow against a different property you own alone. This sidesteps the co-owner entirely.

4. Use a DSCR cash-out refinance. This is the rent-qualified route. DSCR (debt service coverage ratio) compares a property’s rent to its full monthly obligation: principal, interest, taxes, insurance, and any HOA dues. The loan is reviewed primarily on property-level rental income covering the payment, subject to lender guidelines.

A DSCR cash-out isn’t a way around the co-owner, though. Individual co-owners on a deed generally still sign the mortgage documents. What changes is the entity: an LLC can hold title on a DSCR loan, subject to program eligibility, which makes it the answer for two friends who bought through an LLC. Cash-out leverage on standard rentals tops out around 75% LTV, and lenders commonly expect about 6 months of seasoning.

Coverage requirements vary. Many select programs start at 1.00, and a separate select-lender path goes below 1.00 with leverage and terms adjusted. A ratio above 1.00 isn’t the same as positive cash flow, because repairs, vacancy, management, and utilities sit outside the calculation. Credit minimums also differ by program: a 620 floor exists in parts of the network, most programs want about 660, and 700 or better opens the strongest leverage. Lendmire’s complete DSCR loans guide walks through those structures in more detail.

For the HELOC side of this question, Lendmire’s page on investment property HELOC requirements for a co-owned home goes deeper on documents.

A Co-Owner Agreement Checklist

Put these in writing before anyone signs a lien:

• Who makes the payments, and what happens if that person misses one.
• Who approves each draw, and any cap on how much can be drawn.
• What the funds can be used for.
• What happens on a sale, a death, or a disagreement while the line is open.
• A buyout formula if one owner wants out.
• Whether the lien-only signer is paid, protected, or compensated for the risk.

Have an attorney review it. This isn’t a formality, because the agreement is what protects a friendship or a family relationship when the numbers get uncomfortable.

Key Terms Defined

Lien: The legal claim on a property that secures a debt. Foreclosure is how a lender enforces it.

Note: The signed promise to repay a loan. Only borrowers sign it.

Lien-only signer: A co-owner who signs the security instrument without signing the note. Their share is pledged, but they aren’t personally liable for repayment.

Tenancy in common: A form of co-ownership where each owner holds a separate, transferable share.

Joint tenancy: A form of co-ownership where owners hold equal, undivided interests, usually with survivorship rights.

CLTV: Combined loan-to-value, meaning all liens on the property divided by its value.

Ready to Compare Your Options?

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, so qualification and approval stay with the lender and depend on lender guidelines and full file review. This is not a commitment to lend.

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. Cornell Law School Legal Information Institute: Joint tenancy

2. Yahoo Finance: HELOC on an investment property

3. BiggerPockets thread

4. Cornell Law School Legal Information Institute: Right of survivorship

5. Rental Real Estate: Investment property HELOC guide