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HDFC Co-ops in NYC: Income Limits, Rules and Risks

HDFC co-ops sell below market because buyers must meet income caps and resale limits. How the limits work, the Section 576 formula, financing and what to check.

8 min read · Updated

An HDFC co-op is a limited-equity cooperative in New York City where buyers must meet income limits and resale profits are restricted, which is why apartments list far below nearby market-rate co-ops. You can buy one only if your household income is under the building's cap, you plan to live there, and you accept that you won't be able to sell for full market value later.

The details vary building by building. That's the most important thing to understand about HDFCs: the rules that bind you are in that co-op's own documents, and the strictest one wins.

At a glance

Number of HDFC co-ops in NYC
1,100+
Per HPD
Legal basis
PHFL Article XI
Plus the Business Corporation Law; supervised by HPD
Statutory income ceiling
165% of AMI
Many buildings set lower caps in their documents
Affordability guide
≤ 1/3 of income
Mortgage + maintenance + utilities, per HPD
Owner occupancy
Almost always required
Long-term sublets generally not allowed
Co-op/condo tax abatement
Not eligible
HDFCs are excluded by DOF

What an HDFC co-op is

HPD explains the history: New York City took ownership of many abandoned, distressed buildings decades ago. HPD rehabilitated some and, over time, let the tenants buy them as limited-equity cooperatives organized as Housing Development Fund Corporations. More recently the city has also financed new construction and rehabilitation of HDFC co-ops.

Under the Private Housing Finance Law, a housing development fund company must be organized to develop housing for persons of low income (PHFL §573). In exchange, HDFC co-ops get reduced real estate taxes; the law lets a city grant exemptions for up to 40 years (PHFL §577). HPD supervises the co-ops for compliance.

Two features set HDFCs apart from ordinary co-ops:

  • Equal shares. In HDFC co-ops all shareholders own an equal number of shares, regardless of apartment size.
  • Limited profit. Your ability to profit when you sell is limited so the unit stays affordable to the next low-income buyer.

Income limits: three ways a building can set them

Every HDFC must follow Article XI, which defines low income as household income up to 165% of Area Median Income (AMI). HPD says many HDFC co-ops have stricter limits in their deed, certificate of incorporation, bylaws, offering plan or regulatory agreement, and each HDFC must follow the most restrictive rule. In practice you'll see one of these:

How an HDFC co-op’s buyer income cap is set
MethodWhere it comes fromWhat it means for you
165% of AMIArticle XI of the Private Housing Finance LawThe ceiling for every HDFC if nothing stricter applies
A set AMI level (for example 80% or 120% AMI)Building documents or an HPD regulatory agreementCompare your household income and size to that year’s AMI table
Section 576 formulaOften referenced in the building’s deedYour cap depends on the unit’s maintenance, utilities and what the seller paid
Source: NYC HPD, HDFC Cooperatives

The Section 576 formula, step by step

Some HDFC documents refer to a formula in Section 576 of the Private Housing Finance Law instead of an AMI level. HPD describes it this way: your maximum household income is the unit's annual maintenance plus utility costs, times 6 for a one- or two-person household (or 7 for three or more people), plus 6% of the seller's original investment.

  1. 1

    Add annual maintenance and annual utilities

  2. 2

    Multiply by 6 (1–2 people) or 7 (3+ people)

  3. 3

    Add 6% of what the seller originally paid

  4. 4

    The total is the buyer’s maximum income

Notice the effect: a cheaper original purchase or lower maintenance means a lower income cap. Two apartments in the same building can have different limits. Ask for the numbers before you fall for a unit.

Resale limits and flip taxes

Many HDFCs charge a flip tax that splits the seller's profit with the co-op. HPD gives two illustrations: with a 70/30 flip tax, a shareholder who bought at $60,000 and sells at $100,000 keeps $28,000 of the $40,000 profit and the HDFC gets $12,000; with a 90/10 split, a $20,000 profit gives the seller $18,000 and the co-op $2,000. The co-op uses that money for repairs and reserves.

Co-ops with a regulatory agreement may also cap sale prices. HPD says sale prices should be low enough that buyers aren't generally spending more than a third of their income on mortgage, maintenance and utilities. So your future sale price depends on what an income-eligible buyer can afford, not on the open market. Read how co-op flip taxes work for the general concept.

HDFCs also can't simply drop the restrictions. In 2015 the New York State Attorney General published guidance on the legal restrictions on converting an HDFC to a market-rate project, which HPD links on its HDFC page.

Living there: occupancy, sublets and governance

  • You must live there. HPD says almost all HDFC co-ops require owner occupancy in their certificates of incorporation.
  • Sublets are limited. Short-term sublets with board permission, when you intend to return, are generally allowed; long-term sublets are not. Any subtenant must also meet the income limits.
  • The board runs it. Shareholders elect a board, typically every year, which must keep the co-op financially healthy and compliant with income, resale and sublet rules.
  • Annual reporting. HDFCs with an HPD regulatory agreement must send HPD certain documents each year.

Financing an HDFC apartment

You need a co-op share loan, and lenders must underwrite both you and the building. HDFC buildings are often small, older, and run by volunteer boards, and their resale limits affect the collateral, so fewer lenders make these loans. Start lender conversations early and ask specifically whether they lend in HDFC co-ops. Some practical points:

  • No mortgage recording tax. The Department of Finance notes that mortgages on individual co-op apartments don't incur the mortgage recording tax. See co-op share loans vs mortgages.
  • HomeFirst can help. HPD lists the HomeFirst Down Payment Assistance Program, up to $100,000 for eligible first-time buyers at or below 120% AMI, among resources for prospective HDFC shareholders. Check HomeFirst eligibility.
  • No co-op/condo abatement. DOF excludes HDFC properties from the co-op and condo property tax abatement, so don't expect that credit on your maintenance.
  • Watch for expiring tax benefits. HDFC tax exemptions have terms. Ask the board when the building's exemption or regulatory agreement ends, since a change could raise maintenance.

How to check a building before you bid

  1. 1

    Ask for the governing documents

  2. 2

    Search ACRIS

  3. 3

    Confirm the exact income cap for this unit

  4. 4

    Review the finances

  5. 5

    Check the building record

  6. 6

    Questions go to HPD

Where HDFC apartments are listed

HPD says most HDFC apartments for sale are listed like other co-ops, by shareholders or boards through brokers and listing sites, sometimes through nonprofits, and some through NYC Housing Connect. You can also check the homes for sale on Roofy. When you find one, use the co-op board package checklist; HDFC boards will also ask for income documentation for every household member.

Fact-checked October 12, 2026

Re-read Oct 12, 2026. All HDFC rules come from HPD’s HDFC page: 1,100+ HDFC co-ops; incorporated under BCL and PHFL Article XI and supervised by HPD; equal shares per shareholder; low income defined as up to 165% AMI under PHFL with stricter limits often in building documents; most restrictive rule applies; one-third-of-income affordability guide; Section 576 formula (6x for 1–2 people, 7x for 3+, times maintenance plus utilities, plus 6% of seller’s original investment) and HPD’s worked examples ($72,984 and $102,264); owner-occupancy and sublet limits; flip tax examples; regulatory agreement annual submissions. Section 576 examples re-checked in HPD PDF (8,400+1,164=9,564 x6=57,384 +15,600=72,984; 12,552 x7=87,864 +14,400=102,264). PHFL 573(3)(a) low-income purpose and 577 40-year cap confirmed. Exclusion from the co-op/condo abatement from DOF. HDFC AMI table on HPD’s page is dated 2021, so we do not reproduce it.

Sources

  1. HDFC Cooperatives (information and requirements) · NYC Department of Housing Preservation and Development (accessed October 12, 2026)
  2. Section 576 maximum income examples · NYC HPD (accessed October 12, 2026)
  3. NY Private Housing Finance Law §573 (housing development fund companies) · New York State Senate (accessed October 12, 2026)
  4. NY Private Housing Finance Law §577 (tax exemptions) · New York State Senate (accessed October 12, 2026)
  5. Co-op and Condo Property Tax Abatement (eligibility) · NYC Department of Finance (accessed October 12, 2026)
  6. Mortgage Recording Tax annual report (co-op loans not subject) · NYC Department of Finance (accessed October 12, 2026)
  7. HomeFirst Down Payment Assistance Program · NYC HPD (accessed October 12, 2026)
  8. ACRIS · NYC Department of Finance (accessed October 12, 2026)

General information, not legal, tax or financial advice. Rules change; confirm with the agency or a professional before you act.

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