A co-op apartment is not a rental or a traditional home purchase — you buy shares in a corporation that owns the building, and those shares give you the right to live in a specific unit.
When you buy into a co-op, you own stock in the building's corporation, not the apartment itself. The corporation holds the deed to the entire building. Your shares may have access to you to occupy a particular unit and to vote on building decisions. You pay a monthly fee (called a "carrying charge" or "maintenance fee") that covers your share of the mortgage, property taxes, insurance, utilities, and building upkeep. This is different from a condo, where you own your individual unit outright and pay a separate homeowners association fee.
Co-ops are most common in New York City, but they exist in other cities including Chicago, Washington DC, and parts of Florida and California. The rules, financing, and legal structure vary significantly by state and even by building, so what applies in New York may not explore where you live.
Key Takeaways
- You own shares in a corporation, not the apartment itself, which means you cannot take out a traditional mortgage — most lenders require a co-op loan, which has stricter terms than a home loan.
- The building's board of directors approves all sales and sometimes rejects buyers for reasons that would be illegal in a condo or house purchase, though some states have begun limiting this power.
- Your monthly carrying charge covers your share of the building's entire operating budget, including the underlying mortgage, so it can rise if the building needs major repairs or if other owners default.
- You can usually sublet your unit, but the board must approve the subtenant, and subletting income may be taxed differently than owner-occupied housing.
- Selling a co-op takes longer than selling a condo because the board must approve the buyer, and financing is harder to find.
How ownership and financing work in a co-op
When you purchase a co-op share, you are buying stock in the corporation. The corporation owns the building's deed and holds a single mortgage on the entire property. You do not get a mortgage in your name; instead, you take out a co-op loan from a bank or credit union. This loan is secured by your shares, not by real property, which makes it riskier for lenders. As a result, co-op loans typically require a larger down payment (often 20 to 30 percent, compared to 10 to 20 percent for a house), have higher interest rates, and come with stricter income and credit requirements.
Your monthly carrying charge is set by the building's board and covers your proportional share of the building's expenses. If the building's underlying mortgage is $2 million and you own 2 percent of the shares, you pay roughly 2 percent of the mortgage payment each month, plus your share of property taxes, insurance, heat, water, and staff salaries. If the building needs a new roof or the underlying mortgage rate adjusts, your carrying charge can increase. Unlike a condo owner, you cannot straightforward pay your own mortgage and ignore building finances — if other owners stop paying their carrying charges, the building may default on the underlying mortgage, which can force a foreclosure that affects everyone.
Board approval and purchase restrictions
Before you can buy into a co-op, the building's board of directors must approve you. The board reviews your financial documents, credit history, employment, and sometimes conducts an interview. They can reject you for almost any reason in most states — not enough savings, unstable employment history, or straightforward because they do not think you are a good fit for the building. This power is much broader than what a condo board or homeowners association can do. In New York, the courts have upheld board rejections based on subjective factors, though recent legislation has begun to limit this discretion.
The board also sets rules about who can live in the unit. Some boards prohibit subletting entirely; others allow it only with board approval. Some restrict the number of occupants or require that the owner live in the unit for a certain period before subletting. These rules are binding on all shareholders and are enforced through the proprietary lease, which is the contract between you and the corporation.
The proprietary lease and your rights as a shareholder
When you buy co-op shares, you also sign a proprietary lease, which is a long-term lease (often 70 to 99 years) between you and the corporation. This lease gives you the exclusive right to occupy your unit and outlines your obligations: paying the carrying charge on time, maintaining the unit, following building rules, and obtaining board approval for alterations or subletting. The proprietary lease is not a typical rental lease — it is a legal document that defines your ownership rights and responsibilities.
The proprietary lease can be modified by a shareholder vote, which means the board can change the rules that govern your occupancy. For example, a building might vote to increase the subletting restrictions or to require a higher reserve fund contribution. You have a vote in these decisions, but you are bound by the majority. This is a key difference from owning a house: you have less individual control over your property.
Selling a co-op share and liquidity challenges
Selling a co-op is slower and more complicated than selling a condo or house. The buyer must be approved by the board, which can take weeks or months. The buyer must also find a co-op loan, which is harder to find than a traditional mortgage — not all banks offer them, and those that do have stricter requirements. This means your pool of potential buyers is smaller, and the sale process is longer.
If you need to sell quickly, you may have to lower the price to attract a buyer who can clear the board approval and financing hurdles. Some co-op buildings have a "flip tax," which is a fee (usually 1 to 10 percent of the sale price) that the seller pays to the corporation when shares are sold. This fee is set by the building and can significantly reduce your proceeds. A few buildings also have a "right of first refusal," which means the corporation can match any outside offer and buy your shares itself.
Subletting rules and tax implications
Many co-op boards allow subletting, but with restrictions. You may need board approval for each subtenant, and the board can reject a subtenant for any reason. Some boards limit how often you can sublet or require that you live in the unit for a certain number of years before you can sublet at all. If you sublet, you are responsible for collecting rent from your tenant and paying the carrying charge to the building — the building will not reduce your charge because you are not living there.
Subletting income is taxable, and the tax treatment depends on whether you are subletting the entire unit or just a room. If you sublet the whole unit, the IRS may treat it as investment property rather than a primary residence, which affects your tax deductions and capital gains treatment when you sell. Consult a tax professional before subletting to understand your obligations.
Comparing co-ops to condos and houses
The main differences come down to ownership, control, and financing. In a condo, you own your unit outright and take out a traditional mortgage; the condo board has limited power over who buys units and cannot reject a buyer based on subjective factors. In a house, you own the property and land, and there is no board approval process at all. In a co-op, you own shares in a corporation, the board has broad approval power, and financing is harder to obtain.
Co-ops can be less expensive than condos in the same building because the purchase price is lower and the carrying charge may be lower than a condo's mortgage plus homeowners fee. However, co-ops are less liquid — they take longer to sell and may sell for less if the buyer pool is small. Co-ops also carry more financial risk because you are liable for the building's underlying mortgage; if the building defaults, a foreclosure can wipe out your equity even if you have paid your carrying charge on time.
Frequently Asked Questions
Can I get a traditional mortgage for a co-op apartment?
No. You cannot take out a standard mortgage because you do not own real property — you own shares in a corporation. You must obtain a co-op loan, which is secured by your shares. Co-op loans are offered by some banks and credit unions but not all, and they typically require a larger down payment and have stricter terms than a traditional mortgage.
What happens if I cannot pay my carrying charge?
If you fall behind on your carrying charge, the corporation can file a lien against your shares and eventually foreclose on them, which means you lose your ownership and your right to live in the unit. The corporation can also evict you through a non-payment proceeding. Unlike a house, where a lender must follow specific foreclosure procedures, co-op foreclosures can move faster because they are handled through the corporation's proprietary lease.
Can the board reject my sale to a specific buyer?
Yes, in most states the board can reject a buyer for almost any reason. In New York, the board must act in good faith and cannot reject a buyer arbitrarily, but the courts have interpreted "good faith" broadly. Some states have begun to limit board rejection power, but this varies by location. Before you buy a co-op, review the building's bylaws and ask the board what their approval criteria are.
Is a co-op a good investment?
Co-ops can appreciate in value like any real estate, but they are less liquid than condos or houses, which means you may have to wait longer to sell or accept a lower price. Co-ops work best for people who plan to stay in the building for many years and who are comfortable with board oversight. If you think you might need to sell quickly, a condo or house may be a better choice.
Do I build equity in a co-op the way I do in a house?
Yes, as you pay down the building's underlying mortgage through your carrying charge, you build equity in your shares. However, your equity is tied to the building's financial health and the board's decisions. If the building needs major repairs and the board votes to increase carrying charges significantly, your equity can decrease. In a house, your equity is more directly tied to the property's market value and your own mortgage payments.