Fannie Mae allows a parent to appear on a mortgage as a non-occupant co-borrower with a loan-to-value ratio up to 95 percent when the loan is run through an automated underwriting system, and FHA allows non-occupant family co-borrowers up to 96.5 percent loan-to-value on most one-unit purchases. Those two rules are the foundation of nearly every parent-assisted purchase in New York City, but the mortgage rule is only one piece. Title structure, co-op board review, and gift tax paperwork each carry their own separate set of requirements, and mixing them up is where deals run into trouble. In more than 25 years representing buyers across Manhattan, Brooklyn, Queens, and the Bronx, I have represented parents co-purchasing apartments with their adult children, and the families who plan the mortgage, title, and tax pieces separately, rather than assuming one document covers all three, are the ones who close without surprises.
This guide covers the three common ways a parent helps a child buy in New York: co-borrowing on the mortgage, guaranteeing the loan without taking title, or gifting cash toward the down payment. It also covers how co-op boards treat each arrangement, what title structure to consider, and where NYC transfer tax exposure can shift depending on how the deal is set up. None of this replaces a conversation with a real estate attorney or CPA. In New York, attorney-driven closings are standard: a licensed New York real estate attorney reviews the contract and is the right person to confirm which title and tax rules apply to your transaction.
Fannie Mae: The Non-Occupant Co-Borrower Rule
Under Fannie Mae's Selling Guide (section B2-2-04, Guarantors, Co-Signers, or Non-Occupant Borrowers), a parent can be added to a conventional mortgage as a non-occupant co-borrower even though the parent will not live in the apartment. The parent's income and debts get combined with the child's to calculate household debt-to-income, which is often the entire point: a parent's income can push a marginal application over the approval line. The tradeoff is liability. A non-occupant co-borrower signs the note and mortgage and is legally on the hook for the full loan alongside the child, not just a portion of it. Fannie Mae also requires the parent's identity and Social Security number to be verified like any other borrower. Confirm current loan-to-value limits and documentation requirements with your lender and attorney, since guideline specifics are updated periodically.
FHA: Family Member Co-Borrowers and "Kiddie Condo" Loans
FHA's rules, laid out in HUD Handbook 4000.1, use the term Non-Occupying Borrower Transaction for this arrangement. The baseline maximum loan-to-value for a non-occupying co-borrower is 75 percent, but that cap rises to as high as 96.5 percent when the co-borrowers are family members, the informal "kiddie condo" structure lenders sometimes reference. Watch for carve-outs: HUD generally does not extend the higher loan-to-value allowance when a parent sells directly to a child while staying on as a non-occupying co-borrower, and it treats two-to-four-unit properties differently. FHA rules are updated through periodic handbook transmittals, so confirm the exact percentage and exclusions with an FHA-approved lender before you write an offer, not after.
Gift Letters: Documenting Down Payment Help
If a parent hands over cash for the down payment without going on the mortgage, that money still has to be documented. Fannie Mae, Freddie Mac, and FHA all require a signed gift letter stating the dollar amount, confirming no repayment is expected, and identifying the donor's relationship to the buyer. The lender will also want proof the money moved: a copy of the donor's withdrawal or transfer and the buyer's matching deposit, dated close together. Skipping this step is a common reason closings get delayed, since underwriters treat an undocumented deposit as unverified income. Ask your loan officer for the current gift letter template, since required language varies slightly by investor.
The Three Documents Are Not Interchangeable
A co-borrower agreement, a guarantor arrangement, and a gift letter each solve a different problem: qualifying income, credit backup, or down payment source. A family that prepares only one when the deal needs two will hit a wall at underwriting or the board table. Confirm with your attorney and lender which combination your transaction requires.
Active NYC Listings for Family Purchases
Condos and co-ops currently on the market across the boroughs
120 CENTRAL Park #19A
Central Park South
70 E 10TH Street #9B
Greenwich Village
Listing information provided courtesy of the Real Estate Board of New York's Residential Listing Service (RLS). Information is deemed reliable but not guaranteed. Sale listings verified. ©2026 REBNY. RLS data displayed by Keller Williams NYC.
How NYC Co-op Boards Treat Parent Co-Purchasers
A co-op board's review of a parent-assisted purchase is separate from mortgage underwriting, and it can be the harder gate to clear. Co-op boards have broad discretion to approve or reject a purchaser, and many proprietary leases require the shareholder to use the unit as a primary residence. When the parent is on the deed but the adult child will actually live there, some boards view that as a form of subletting and either require additional disclosures, ask the child to qualify independently, or decline outright. Other boards are comfortable with parents as co-purchasers when the family is transparent from the start. There is no universal rule, and board discretion varies by building. If a co-op is on your shortlist, ask the listing broker whether that board has approved parent co-purchases before. Condos, which lack discretionary board interviews in the same way, generally present fewer obstacles.
Title and Deed: Who Owns What
Being on the mortgage and being on the title are two different questions, and a family can mix and match. A parent who co-signs the loan is not automatically on the deed, and a parent can be added to a deed without ever touching the mortgage. Three structures come up most often. Joint tenancy with right of survivorship gives both owners an equal, undivided interest, and if one dies, their share passes automatically to the survivor outside of probate. Tenancy in common allows unequal shares (a parent contributing 40 percent of the purchase and a child 60 percent, for example), with each owner's share passing under their own will or estate plan. The third option is the child holding sole title while the parent appears only as a non-titled co-borrower or guarantor, carrying loan liability but no ownership interest. Each structure carries different estate planning and creditor exposure implications, exactly the kind of decision a New York real estate attorney should walk through with your family before signing a contract.
NYC Transfer Tax and Mansion Tax: What Title Structure Can Trigger
NYC's Real Property Transfer Tax (RPTT) applies to sales, grants, and transfers of NYC real property where consideration exceeds $25,000. For residential property, the rate is 1.0 percent of the price at $500,000 or below, and 1.425 percent above $500,000. A separate New York State mansion tax adds 1 percent for any residential purchase at $1 million or more, with additional state supplemental rates that increase further above $2 million. These base rates apply when the family closes on the apartment together as buyers.
Where things get more complicated is later transfers, such as adding a parent to a deed after closing or removing a parent's name once a child can qualify solo. New York law exempts bona fide gifts made without consideration, but "consideration" has a broader legal meaning than cash changing hands: it can include assumption of a mortgage or cancellation of debt tied to the property, so an outstanding mortgage balance at a later transfer may be treated as taxable consideration. There is a partial carve-out for one-, two-, or three-family houses and individual condo units that excludes certain existing liens from the taxable amount. These rules turn on the specific facts of your transaction. Confirm the exact transfer tax treatment for your situation with a New York real estate attorney or CPA before deciding how and when to add or remove a parent from title.
Comparing the Three Structures
| Structure | Parent on title? | Parent on the mortgage / liable for debt? | Effect on child's ownership | Typical use case |
|---|---|---|---|---|
| Co-borrower | Usually yes, though not required | Yes, full liability for the loan | Shared ownership unless structured as tenancy in common favoring the child | Child's income or credit alone does not qualify for the target loan amount |
| Guarantor / non-occupant co-signor, off title | No | Yes, liable for the loan without an ownership stake | Child holds full, sole ownership | Parent wants to strengthen the application without holding equity |
| Cash gift, no ownership stake | No | No, no loan liability | Child holds full, sole ownership | Child qualifies for the mortgage on their own but is short on down payment or closing costs |
A Stacking Example
Consider a $700,000 condo purchase using conventional 20 percent down financing rather than any low-down-payment or HDFC-specific program. A 20 percent down payment is $140,000, leaving a $560,000 mortgage. If the child's income alone does not support a $560,000 loan at current qualifying ratios, the family has three levers and can combine more than one. First, a parent can join as a non-occupant co-borrower so household debt-to-income includes the parent's income, addressing the qualification gap directly. Second, if the child qualifies for the loan amount but is short on the $140,000 down payment, a parent can gift part of that sum with a documented gift letter, without ever going on the mortgage. Third, a guarantor arrangement lets the parent strengthen the loan file while staying off title entirely. Which combination makes sense depends on the child's income, estate planning goals, and whether the target building is a co-op or a condo. If the apartment may later serve as a rental once the child moves on, see our three-phase condo planning guide. Review NYC closing costs early, since they typically run 2 to 5 percent of the purchase price on top of the down payment and are often underestimated by first-time family buyers.
Planning a Parent-Assisted Purchase in NYC?
Milton Coste has represented parents and adult children through co-op board review, condo closings, and mortgage structuring across all five boroughs.
Schedule a Free ConsultationCo-op or Condo: Why the Building Type Changes the Plan
Because co-op boards can reject a parent co-purchase outright, decide early whether you are targeting a co-op or a condo, since the two building types evaluate this scenario differently. For a deeper comparison of how co-op boards and condo associations each handle a parent buying for an adult child, see our condo versus co-op guide for parent purchasers. For the full multi-year picture, including refinancing the parent off the loan later or transferring title solely into the child's name, see the complete parents buying guide. If a union membership or public-sector job is part of the household's qualifying income, check the union member home buying programs guide for benefits that can stack with a co-borrower structure.
Start with your NYC buyer guide checklist, then bring your lender's proposed paperwork and target title structure to a real estate attorney before you make an offer. The mortgage rule, the board's comfort level, and the tax treatment of your title choice are three separate conversations, and answering all three before contract signing keeps a parent-assisted purchase from stalling.
Browse Active NYC Listings
Search Properties
