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Buying a commercial condo in NYC: what to check

Buying a commercial condominium is how many New York City businesses stop paying rent: a medical practice buys its suite, a nonprofit buys a floor, a shop buys the ground floor retail unit under an apartment building. You get a deed to your own space, but you also join an association with other owners, rules you did not write and a building you do not control.

This guide covers what to check before you sign a contract on an office, retail or medical condo unit in the city. It is general information, not legal or tax advice. Have a New York real estate attorney review the condo documents and the contract before you commit.

What you are actually buying

A condo unit is real property of its own. In New York City each unit is a separate tax lot with its own deed, its own property tax bill and, if you borrow, its own mortgage. Along with the unit you get an undivided share of the common elements (the lobby, roof, structure, elevators and building systems), expressed as a common interest percentage in the condo's declaration.

That percentage matters. It generally sets your share of the common charges and usually your share of the vote, so a small unit in a large building has little say over budgets, rules and major repairs.

Condos are governed by New York's Condominium Act (Article 9-B of the Real Property Law), the condo's declaration and bylaws, and a board of managers elected by the unit owners.

Read the condo documents first

The declaration and bylaws

These are the condo's constitution. Read them for:

  • Use restrictions. Many declarations limit what a unit may be used for: office only, no medical, no food service, no late hours. A restriction that blocks your business is a deal breaker no matter the price.
  • Your vote and your share. The common interest percentage of the unit, and whether commercial units vote as a separate section on matters that affect only them.
  • Limited common elements. Some costs or spaces (a storefront's sidewalk vault, a dedicated freight entrance, rooftop equipment space) may belong to particular units, with their costs charged to those units.
  • Transfer rules. Some condos give the board a right of first refusal on sales or charge a fee at closing. Commercial units are sometimes exempt. Know before you plan to resell.
  • Signage, alterations and HVAC. Who approves a sign, a build-out, extra cooling or after-hours air, and what it costs.

The budget, reserves and minutes

Ask for the current budget, the last two years of financial statements, the board minutes for the last year or two, and a summary of planned capital work. You are looking for a reserve fund that matches the building's age, no surprise special assessments, and no lawsuits involving the building, the board or the developer. If the unit is a new unit sold by the developer (the sponsor), read the offering plan the sponsor filed, especially its budget and what the sponsor still owes the building.

Unpaid charges and the board's statement

Under the Condominium Act (section 339-z), the board has a lien on each unit for unpaid common charges, ahead of every other lien except tax liens and a first mortgage of record. When a unit sells, unpaid charges come out of the sale price or fall to the buyer. The same section limits what either side can owe to the amount shown in a written statement from the board, so get that statement before closing. In a condo that is entirely non-residential, the declaration may even put the common charge lien ahead of mortgages, which a lender will want to know.

Make sure your use is allowed

A use has to clear three separate hurdles:

  1. The condo declaration and rules, covered above.
  2. The building's certificate of occupancy, which says what the space may legally be used for. Check it in the Department of Buildings records before you sign, not after. A medical practice, a gym or a restaurant in a unit approved for ordinary office or retail use may need a change that the building, the board or zoning will not allow.
  3. Zoning, which governs which uses are permitted at the site at all.

Retail and restaurant buyers in residential condo buildings should look hardest at venting, odors, noise, delivery hours and signage, because residential owners usually outvote the commercial unit.

The building itself

You are buying into the building's obligations, and its costs flow through to you.

  • Local Law 97. Buildings over 25,000 gross square feet, and two or more condo buildings under one board that together exceed 50,000, have annual greenhouse gas limits that began in 2024 and tighten in 2030. A building over its limit faces a civil penalty of up to $268 for each metric ton over, every year, and in a condo that cost lands in the common charges. Ask whether the building has filed its annual emissions reports and what it projects for the 2030 limits.
  • Facade inspections. Buildings taller than six stories must have their facades inspected every five years under the city's Facade Inspection and Safety Program (often called Local Law 11). An "unsafe" finding means repairs, and often a sidewalk shed, paid by the owners.
  • Open violations and permits. Department of Buildings and ECB violations, open permits and recent work are public. Old open violations can delay your own permits for a build-out.
  • Energy grade. Large buildings must post an energy efficiency letter grade near their entrances each year. A low grade is a hint of high operating costs and Local Law 97 exposure.

What it costs to own

Common charges

Common charges pay for the building's staff, insurance, repairs, utilities for the common areas and reserves. They are generally split by common interest percentage. Ask for the history: steady increases are normal; a jump often means deferred work caught up with the building.

Property tax

Your unit gets its own property tax bill from the Department of Finance. Commercial units are Class 4 property, assessed at 45% of market value, with increases phased in over five years. State law (Real Property Tax Law section 581) says a condo cannot be assessed above what the property would be assessed at if it were not a condo, and the city values condos as if they were rental property, so the market value on your notice can sit well below what you paid. Look up the unit's recent bills and Notice of Property Value before you buy. For how taxes compare across large commercial buildings by neighborhood, see NYC commercial property tax by neighborhood.

Insurance and utilities

The condo insures the building. You insure your unit's interior, your improvements and your business. Ask whether electricity is submetered or billed directly, and how after-hours heating and cooling are charged.

Closing costs: a worked example

Take a hypothetical 2,400 square foot office condo bought for $1,800,000 ($750 a square foot), with a $1,350,000 loan (75% of the price):

Item Paid by, by default Amount
City transfer tax (RPTT, 2.625% of the price) Seller $47,250
State transfer tax (RETT, 0.4% of the price) Seller $7,200
Mortgage recording tax (2.8% of the loan) Buyer $37,800

The buyer also pays title insurance, recording fees, legal fees, lender fees and any closing fee or working capital contribution the condo charges. By law the seller pays the transfer taxes, but the contract can shift them: when a developer sells new units, read that clause closely. New York's 1% "mansion tax" applies only to residential purchases, so it does not apply to a commercial unit.

The details, including the thresholds where the transfer tax rates jump, are in our guide to NYC transfer taxes on commercial property. To run your own price and loan, use the NYC transfer tax calculator.

Financing a commercial condo

Commercial condo loans are underwritten on the unit, the building and, for an owner-occupier, your business. Lenders will want the condo documents, the budget and the reserve figures, and litigation, thin reserves or one owner holding most of the units can make a loan harder to get.

An owner-occupier may qualify for an SBA loan. The SBA's 504 program finances the purchase or renovation of existing buildings, with SBA-backed amounts of up to $5.5 million and terms of 10, 20 or 25 years. Federal rules require the business to occupy at least 51% of the space it buys in an existing building (it may lease out the rest), and the borrower's contribution starts at 10% of the project, rising to 15% for a business two years old or less or for a special-purpose property, and 20% when both apply. A lender or a Certified Development Company can tell you whether your purchase fits.

Investors buying a unit to lease out may be able to use it as replacement property in a 1031 exchange. Talk to your accountant before you sign a contract, because the exchange deadlines start at the sale of the property you are giving up.

Look it up yourself

Most of what matters about a building is public:

  • ACRIS, the city's property records system, shows the unit's past deeds, prices and mortgages.
  • The Department of Finance property tax records show the unit's bills and its Notice of Property Value.
  • The Department of Buildings shows the certificate of occupancy, permits and violations.

For large buildings, Leasemark's building pages bring the city's records together in one place: the owners of record (for a condo, its unit owners), the estimated property tax, recent sales, the energy grade, construction permits and the nearest subway. Recent building sales shows what large buildings near you have traded for.

Buy or keep leasing?

Owning fixes your occupancy cost against rent increases, builds equity and ends the renewal cycle. It also ties up capital in your space, makes moving or shrinking slower, and leaves you sharing decisions with a board. The pool of buyers for a commercial unit is smaller than for a home, so plan for a longer sale if you ever move. If your business might need a very different amount of space within a few years, leasing may still be the better fit.

Next steps

Where to look

The 6 neighborhoods Leasemark covers with the most office floor area, per NYC PLUTO tax lot data (26v2).

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