Partition Lawsuit Defense Attorney in New York, NY

If a co-owner has sued you to force the sale of property you jointly own, you are the defendant in a partition action. This page is written for you. It explains what happens after you are served, the deadlines you must meet, the defenses New York law recognizes, the credits and offsets you can demand before any money is divided, and — if the property is inherited family property — your statutory right to buy out the co-owner who is suing you instead of losing the property to a sale.

If you are considering bringing a partition action rather than defending one, see our overview of how partition of property works in New York. This page covers only the defendant's side.

You Have Been Served: Deadlines Come First

A partition action in New York is commenced in the Supreme Court of the county where the property is located, and the plaintiff is required to file a notice of pendency (lis pendens) against the property under RPAPL § 904 and CPLR § 6501. That filing clouds the title, so even before you respond, the lawsuit is already affecting your ability to sell or refinance. You can read more about how that works on our notice of pendency page.

Your response deadline is set by the CPLR:

20 days to appear and answer if the summons and complaint were personally delivered to you in New York (CPLR §§ 320(a), 3012);
30 days if you were served by another method, such as substituted service or service outside the state.

Missing the deadline is dangerous. A defaulting co-owner can lose the ability to assert defenses, demand credits for money spent on the property, contest the valuation, or invoke the heirs-property buyout right. Even in default, you retain your ownership share of the net proceeds — but you forfeit most of your leverage over how much those proceeds will be and how the property is disposed of. If you have already defaulted, moving promptly to vacate the default (CPLR § 5015) is often still possible with a reasonable excuse and a meritorious defense.

What Happens After You Are Served: A Realistic Timeline

Service and notice of pendency. The complaint must describe the property, each owner's interest, and any liens or encumbrances (RPAPL § 902).
Answer with defenses and counterclaims (20 or 30 days). This is where affirmative defenses, an accounting demand, and any counterclaims (for example, to quiet title) must be raised.
Heirs-property determination, if applicable. If the property may qualify as heirs property, the court applies RPAPL § 993, which changes the entire procedure (see below).
Discovery and motion practice. Deeds, mortgage statements, tax records, repair invoices, and rent records are exchanged. Plaintiffs frequently move for summary judgment; defendants oppose by showing disputed equities or defenses.
Interlocutory judgment and referee. If partition is granted, the court appoints a referee (RPAPL §§ 911, 915) to determine the parties' rights and whether the property can be physically divided without great prejudice; if not, a sale is directed.
Accounting and adjustment of equities (RPAPL § 945) — often the most consequential phase for defendants.
Sale or division, then distribution under the final judgment.

Contested partition actions in New York commonly take a year or more from filing to distribution, and most settle before a sale is ever held.

Challenging the Plaintiff's Right to Partition at All

Under RPAPL § 901, partition is available to a person holding an interest as a joint tenant or tenant in common. A defense can begin by testing whether the plaintiff actually holds that interest:

Defective or disputed title. If the plaintiff's deed is forged, was procured by fraud or undue influence, or was never validly delivered, the plaintiff may have no interest to partition. This defense is often paired with a counterclaim to quiet title or to cancel the deed. See also our page on removing a person from a deed.
Estate property not yet distributed. Where title still rests with a decedent's estate and has not vested in the heirs, questions of standing and the proper forum (Supreme Court versus Surrogate's Court) can be raised.
Adverse possession following ouster. Occupancy by one co-tenant is presumed to be for the benefit of all, but under RPAPL § 541 that presumption ends after ouster or after ten years of continuous exclusive occupancy. A co-tenant who has been ousted for the statutory period may have lost — or a possessing co-tenant may have extinguished — the interest on which the partition claim depends. See our discussion of adverse possession in New York.

Affirmative Defenses to Partition in New York

Partition is a statutory remedy, but New York courts have long held it remains subject to the equities between the parties. Recognized defenses include:

Agreement not to partition. Co-owners can waive the right to partition by express agreement — common in partnership agreements, LLC operating agreements, tenancy-in-common agreements, and co-ownership agreements between family members. Courts will also find an implied waiver where partition would defeat the clear purpose of the parties' arrangement. If the owners hold through an LLC or partnership, partition of the real property itself is generally unavailable to the individual members; the dispute belongs in the entity context (see our real estate partnership disputes page).
Unclean hands and other equitable defenses. Because partition invokes the court's equitable powers, a plaintiff whose own misconduct concerning the property — such as fraudulently acquiring the interest — may be barred or limited.
Estoppel and waiver by conduct. Where the plaintiff induced the defendant to invest in or occupy the property in reliance on a shared understanding, estoppel arguments can defeat or condition partition.
Constructive trust counterclaim. If the plaintiff was placed on the deed for convenience (for example, to help with financing) with a promise to reconvey, a constructive trust counterclaim can challenge whether the plaintiff holds a beneficial interest at all.
Prejudice from physical division versus sale. New York law prefers partition in kind (physical division) and permits a sale only where division would cause great prejudice to the owners (RPAPL § 915). For some properties — particularly larger parcels outside the city — insisting on this showing can change the outcome.

Be realistic: none of these defenses is automatic, and courts grant partition in most cases where the plaintiff genuinely holds title. But a well-pleaded defense forces the plaintiff to litigate rather than obtain a quick judgment, and that pressure is frequently what produces a fair settlement or buyout.

The Accounting: Credits and Offsets Before Anyone Gets Paid

Even when partition itself cannot be defeated, the division of proceeds can be fought. RPAPL § 945 authorizes the court to adjust the equities among co-owners before distribution. For many defendants, this is where the real money is. Credits and offsets commonly asserted include:

Property taxes paid disproportionately by one co-owner;
Mortgage principal and interest paid beyond the co-owner's proportionate share;
Insurance premiums and other necessary carrying costs;
Necessary repairs and, in appropriate cases, improvements that increased the property's value;
Rents collected from third parties by the plaintiff and never shared — a co-tenant who collected rent must account for it;
Use and occupancy. Under New York law, a co-tenant who lives in the property generally does not owe rent to the other co-tenants merely for occupying it. Absent an ouster — actual exclusion of the other co-owner — occupancy alone is not chargeable. If the plaintiff claims occupancy rent against you, requiring proof of ouster is a key defense; conversely, a possessing co-tenant's credits for taxes and repairs may be offset by the value of occupancy in some circumstances.

Documentation wins accountings. Bank statements, canceled checks, tax bills, and contractor invoices going back years should be gathered as soon as you are served.

Inherited Property: The RPAPL § 993 Buyout Right

If the property came down through a family — which describes many New York partition disputes — the Uniform Partition of Heirs Property Act, enacted in New York as RPAPL § 993 (effective December 2019), gives defendants powerful protections. In broad strokes, property qualifies as "heirs property" when there is no binding partition agreement, a co-tenant acquired title from a relative, and family members hold a sufficient share of the interests. (The full qualification test is discussed on our main partition page.)

For a defendant, § 993 changes the case in three critical ways:

Mandatory settlement conference. The court must hold a settlement conference at which the parties are required to negotiate in good faith, similar to residential foreclosure conferences. Courts have not hesitated to halt cases where the statute's procedures were bypassed, so insisting on strict compliance is itself a defense strategy.
Court-supervised valuation and a right of first purchase. The court determines the property's fair market value, ordinarily by independent appraisal unless the parties agree otherwise, after notice and an opportunity to object. The co-tenants who did not seek the sale then have a statutory window — forty-five days after notice of the valuation — to elect to buy out the interest of the co-tenant seeking partition at that court-determined value, with additional time set by the court to complete payment. This means a defendant who wants to keep a family home can often do so by purchasing the plaintiff's share rather than watching the whole property be sold.
Open-market sale instead of auction. If no buyout occurs and physical division is not feasible, the court must order an open-market sale through a licensed real estate broker at a court-approved listing price — not a courthouse auction, which historically produced depressed prices. Defendants can participate in selecting the broker and challenging the listing terms.

Deadlines under § 993 are strict. A defendant who wants to exercise the buyout must act within the statutory windows, and financing (often a mortgage or private loan against the property) should be lined up early. Our private lending page discusses financing options, and our deed transfer page covers the conveyance once a buyout closes.

An Illustrative Example (Hypothetical)

Consider a hypothetical, offered only to illustrate how these rules interact: two siblings inherit a two-family house in Queens from their mother. One sibling has lived there for years, paid the property taxes and insurance, and replaced the roof. The other sibling sues for partition and demands half the sale proceeds plus "rent" for the years of occupancy. In the answer, the occupying sibling would (1) assert that the property is heirs property under RPAPL § 993, triggering the settlement conference, appraisal, and buyout procedures; (2) deny any obligation for use and occupancy absent proof of ouster; and (3) demand an accounting under RPAPL § 945 for the taxes, insurance, and roof paid out of pocket. Those credits reduce the price of buying out the plaintiff's half, and the § 993 buyout right lets the occupying sibling keep the house rather than lose it to a forced sale. Every case turns on its own facts, and no outcome can be promised — but this is the framework a defense is built on.

Frequently Asked Questions

Can I stop a partition sale in New York?

Sometimes. A sale can be defeated where the plaintiff lacks a valid ownership interest, where the co-owners agreed (expressly or implicitly) not to partition, or where equitable defenses apply. Where the property is heirs property, RPAPL § 993 lets you buy out the plaintiff's interest instead of allowing a sale. Even where partition is ultimately granted, defenses and the accounting frequently change the economics enough to produce a negotiated resolution.

Can I buy out my co-owner instead of selling?

Yes, in two ways. Any partition case can settle with a negotiated buyout at any time. For heirs property, RPAPL § 993 gives you a statutory right to purchase the suing co-tenant's interest at a court-determined fair market value, if you elect within the statutory deadline.

I paid the mortgage and taxes for years. Does that matter?

Yes. Under RPAPL § 945, the court adjusts the equities before dividing proceeds. Payments of taxes, mortgage, insurance, and necessary repairs beyond your share are credited to you — if you plead the accounting and prove the payments.

Do I owe my co-owner rent because I live in the property?

Generally no. A co-tenant in possession does not owe use and occupancy to the others unless there was an ouster — an actual exclusion of the other co-owner from the property.

What happens if I ignore the lawsuit?

You risk a default. You would still receive your share of net proceeds, but you would lose the ability to assert defenses, claim accounting credits, contest the valuation, or exercise the § 993 buyout. Deadlines under CPLR §§ 320 and 3012 are short — 20 or 30 days depending on how you were served.

How long does a defended partition case take?

Contested cases in the New York Supreme Court commonly run a year or longer through discovery, the interlocutory judgment, the referee's proceedings, and the accounting. Heirs-property cases add the settlement conference, appraisal, and buyout stages. Most cases settle before a sale is completed.

Speak With a New York Partition Defense Lawyer

If you have been served with a partition summons and complaint anywhere in New York, the clock is already running. The Law Offices of Albert Goodwin defends co-owners in partition actions — answering the complaint, asserting defenses and accounting claims, enforcing RPAPL § 993 heirs-property rights, and negotiating buyouts. We are located in New York, NY. Call us at 212-233-1233 or email [email protected] to discuss your case.

This page is attorney advertising and provides general information about New York law; it is not legal advice for your specific situation. Statutory references include RPAPL §§ 901, 902, 904, 911, 915, 945, and 993, and CPLR §§ 320, 3012, and 6501.