Two routes exist for a home equity loan on a tenancy-in-common (TIC) property, and they produce opposite outcomes. A loan secured by the whole property needs every co-owner on title to sign the mortgage or deed of trust–no exceptions, no workarounds. But a loan secured only by a borrower’s undivided fractional interest, while legally permissible, is offered by a surprisingly narrow set of institutions, most of them clustered in the San Francisco Bay Area. Most readers hoping for the second path end up on the first, or on a sibling buyout refinance, or on a home equity investment agreement (which, despite the name, is an equity-sharing contract rather than a loan). Because the mechanics shift by state and by product, you’ll want to confirm specifics with a real estate attorney in your state and talk to lenders directly before signing anything.
What tenancy in common means for borrowing
Tenancy in common is a co-ownership arrangement where two or more people hold separately conveyable undivided interests in the same real property. Each co-tenant can sell, devise or mortgage their own interest without the others’ consent. And each has an equal right to possess the whole property. That dual structure–separate ownership of a share paired with shared possession of the physical property–is what makes TIC loans awkward for lenders.
TIC isn’t the same as joint tenancy with right of survivorship, where a deceased owner’s interest passes automatically to the surviving owners. In TIC, a deceased co-tenant’s share passes under their will or state intestacy law, which is why so much TIC co-ownership originates from inheritance. The other common origin is intentional: San Francisco buildings sold as fractional-interest TIC units since the 1980s to work around condo-conversion limits. Those two populations–inherited co-heirs and intentional TIC owners–face the same legal framework but very different lender appetites.
Path 1: The whole-property loan and the signature rule
A home equity loan secured by the whole property attaches a lien to 100% of the real estate. Pierce Law and Chase’s consumer guidance both confirm the rule: every titled co-tenant must sign the security instrument, because no single co-tenant can encumber a share greater than their own. So if one of three siblings on title refuses to sign, the whole-property loan is dead at that lender, right there, before the file ever moves to underwriting. Consent isn’t a soft preference. It’s a condition precedent to the lien.
A spousal-signature overlay sits on top of the TIC rule in community-property and dower states. Even where a non-titled spouse holds no record interest, state law may still require their signature on a non-purchase-money home equity loan. See spousal signature requirements by state for the state-by-state treatment.
Path 2: Borrowing against a fractional interest alone
Under common law–reinforced by state attorney general opinions such as the 1982 Maryland AG opinion–a tenant in common can unilaterally mortgage their own undivided interest. The lien attaches only to that borrower’s fractional share. The co-tenants don’t sign. On paper, the uncooperative-co-owner scenario is solved.
In practice, almost no mainstream lender will accept a fractional interest as collateral. Three features kill the deal for a standard home equity underwriter. The security covers only a fractional share rather than the physical property. Foreclosure yields a partial interest with poor resale value. And a partition action by another co-tenant can convert the collateral into cash, or a specific parcel, at a court-chosen time. Stimmel Law and Pierce Law both record that most institutional lenders decline the collateral for these reasons.
So where does fractional lending actually happen? The specialty market sits almost entirely in the San Francisco Bay Area. Bank of Marin, Sterling Bank & Trust and National Cooperative Bank have historically been active in fractional TIC first-mortgage lending. Confirm current 2026 product availability directly with each lender, because public sources document their purchase and refinance products rather than home equity second liens or HELOCs specifically. Reported structural terms from secondary sources include 3/1, 5/5 and 7/1 ARMs rather than fixed rates (there’s no secondary market for fixed-rate fractional paper), loan-to-value caps of roughly 70 to 80 percent on purchase and 65 to 75 percent on refinance, owner-occupancy preference, and loan ceilings such as Bank of Marin’s historical $1.5 million figure. Rate quotes in older coverage ran about 0.5 to 1.0 percent above comparable condo rates. Those figures predate 2025 and should be re-verified before any decision.
Worth knowing: a fractional home equity loan or HELOC specifically, as distinct from a first-mortgage fractional product, isn’t well documented in public lender disclosures. Treat second-lien fractional availability as a question to ask directly, not an assumed product.
Partition risk and why lenders demand waivers
A partition action is a lawsuit in which any co-tenant can ask a court to divide the property physically or, far more commonly, order it sold and the proceeds split by ownership percentage. For a fractional-interest lender, partition is the main structural threat: it can force sale of the collateral at an inopportune moment. Specialty TIC lenders typically require an express partition waiver in the TIC agreement, reaffirmed in the loan documents, recorded against title and backed by an opinion of borrower’s counsel. A covenant making a partition filing an event of default is also standard, per Mondaq’s review of TIC lending.
But a right of first refusal is not a partition waiver. In LEG Investments v. Boxler (Cal. Ct. App. 2010), the court held that a ROFR doesn’t permanently waive the right of partition. Open-ended waivers also risk being struck as unlawful restraints on alienation. Enforceability varies by state–which is why a local real estate attorney needs to review the specific waiver language rather than relying on generic guidance.
GSE and government-program eligibility
Fannie Mae and Freddie Mac single-family programs generally require fee-simple ownership by the borrower, which effectively excludes most fractional TIC structures from conforming conventional eligibility. Confirm the current Single-Family Selling Guide and Seller/Servicer Guide language with your lender before relying on this. GSE multifamily rules do accommodate TIC borrower structures, though with heavy conditions. Fannie Mae’s Multifamily Guide section 302.02A requires a validly executed TIC agreement, a designated day-to-day manager, mortgage payments ranking above co-tenant distributions and documented buy-out rights. Freddie Mac’s small-balance TIC rules require involuntary liens on any co-tenant interest (judgment or tax liens, for example) to be discharged within 30 days. Those multifamily frames rarely apply to a residential home equity loan but illustrate how the GSEs think about TIC risk.
FHA, VA and USDA treatment of TIC co-ownership on refinance isn’t uniformly documented in public materials and should be confirmed with an approved lender for your program.
Alternatives when the fractional path is closed
Most readers arriving here from an inheritance end up taking a different route than the fractional loan. The dominant alternative is a sibling buyout refinance: one co-heir buys out the others using a cash-out refinance, consolidating ownership first and then borrowing against fee-simple title. The non-buying co-owners quitclaim their interest at closing. Cash-out seasoning after a quitclaim deed rules apply before the new loan funds.
A home equity investment agreement, sometimes called an HEI, pays the owner cash for a share of future home appreciation and gets repaid on sale or at a term limit. Providers such as Point require all legal owners on title to sign the HEI contract, so an HEI doesn’t solve the uncooperative-co-owner problem either. Co-op share loans and cash-out refinances on property held in an LLC are structurally different products that readers sometimes confuse with TIC lending. And while a non-occupant co-borrower can help a borrower qualify on income, their signature doesn’t solve a missing-co-tenant signature on title.
Selling the fractional interest to a co-owner or to a third-party investor, or filing a partition-by-sale action, remain the last-resort options when no financing fits.
What to ask a lender before applying
So what should you actually ask when you pick up the phone? Four questions sort product reality quickly. Will the lien attach to the whole property or only to my undivided interest? Do you underwrite the TIC agreement, and who pays for the outside legal review? Is a partition waiver required, how is it recorded, and does my co-tenant have to sign it? Is this a first mortgage, home equity loan or HELOC, and what are the LTV, occupancy and rate-structure limits?
One more thing: under New York RPAPL § 929, a creditor’s lien on an undivided interest attaches only to the share assigned to the lien-granting party after a partition. State-specific lien attachment rules vary, which is another reason the lender’s answers on partition and lien scope need to be in writing–not just told to you over a cheerful call.
Frequently asked questions
Do all owners have to sign for a home equity loan on a jointly owned house? For a loan secured by the whole property, yes. Every titled co-tenant must sign the security instrument.
Can one tenant in common mortgage their interest without consent? Legally yes, under common-law principles reaffirmed in state AG opinions. Finding a lender who’ll accept the fractional collateral is the harder part.
Is a HELOC available on a tenancy-in-common fractional interest? Public lender disclosures confirm fractional first-mortgage products rather than HELOCs. Ask the lender directly about second-lien availability.
Will Fannie Mae or Freddie Mac buy a loan on a fractional TIC interest? Conforming single-family programs generally require fee-simple ownership. Confirm current Selling Guide and Seller/Servicer Guide language with your lender.
Can I borrow against inherited property my siblings also own? You can borrow against your own share only if a fractional lender agrees. The more common path is a sibling buyout refinance that consolidates ownership first.
Do fractional TIC loans have fixed rates in 2026? Secondary-market constraints make fixed-rate fractional loans uncommon. ARM structures such as 3/1, 5/5 and 7/1 dominate reported offerings.
What is a partition waiver and why do lenders require it? It’s a contractual agreement that no co-tenant will file a partition action during the loan term. Lenders require it to protect the collateral from a forced sale.
Is a home equity investment the same as a home equity loan on a TIC property? No. An HEI is an equity-sharing contract rather than a loan, and HEI providers typically require every titled owner to sign.
Requirements and product availability vary by lender and state. Confirm current thresholds, program eligibility and partition-waiver treatment with a real estate attorney licensed in your state and with lenders directly before applying.
