Apartment building insurance on Long Island

What makes a Long Island apartment building different

• Distance to waterSouth shore, north shore and the two forks are rated differently, and many insurers draw a line at a set distance from the coast.
• Wind deductibleNear the coast, wind or named-storm losses often carry a percentage deductible instead of the flat one that applies to a fire.
• Flood and surgeExcluded from the property policy. It is a separate purchase, building by building.
• Frame garden apartmentsWood-frame construction, shared attics and roof age matter more here than in a city of brick buildings.
• Town or village rulesRental permits come from the town, or from the village if the property is inside one. Two properties a mile apart can answer to different codes.
• Rent stabilization by villageIt exists in parts of Nassau County only where the municipality adopted it.

The parts of the policy are the same as anywhere (how apartment programs are put together). What changes on the Island is what gets asked.

Wind, hurricane deductibles and what triggers them

The state Department of Financial Services tells consumers that some insurers require hurricane deductibles for properties in Nassau and Suffolk counties, commonly one to five percent of the amount of insurance, and that separate windstorm deductibles can be triggered when wind of any speed causes damage. That guidance is written for homeowners. An apartment building is on a commercial policy, where the deductible and its trigger are whatever the form says, so the wording is the thing to read:

• What starts it? A hurricane, a named storm, or any wind or hail. A named-storm trigger applies far more often than a hurricane one.
• A percentage of what? Usually of the insured value of each building, not of the loss. On a complex with several buildings, ask whether it applies per building or per location.
• For how long? Some forms apply the deductible for a set number of hours before and after landfall.

Sandy is the local example. In 2012 the state’s financial services superintendent told insurers that hurricane deductibles were not triggered, because the storm did not have sustained hurricane-force winds when it came ashore in New York. A wind-or-hail deductible would have had no such way out. A 2025 circular letter from the department also asks any property insurer to notify it whenever a hurricane or windstorm deductible is activated. Hurricane deductibles in New York.

For the wind quote itself, underwriters want roof age, covering and shape, any roof tie-downs or impact-rated openings, and a current replacement cost for each building.

Flood and storm surge since Sandy

The National Hurricane Center’s report on Sandy measured water three to six feet above ground across Nassau and Suffolk: 4.6 feet in Freeport, three to four feet in Long Beach and across the bay in Massapequa, and 5.6 feet on Fire Island. It says around 100,000 homes on Long Island were severely damaged or destroyed, primarily by storm surge and waves.

None of that water is covered by a standard commercial property policy. Flood comes from the National Flood Insurance Program or a private flood insurer, the federal program caps what it will write on one building, and a new policy generally does not take effect until 30 days after purchase, so it cannot be bought with a storm on the map. How flood insurance works.

• Send an elevation certificate for each building if you have one. It is the first thing a flood underwriter prices from.
• Say what is at grade. Ground-floor apartments, boiler rooms, laundry rooms and electrical service are where surge losses land.
• Disclose on the lease. Real Property Law 231-b requires every residential lease in the state to say whether the premises are in a FEMA floodplain and whether the owner knows of past flood damage.

When the regular market says no: NYPIUA and C-MAP

Two programs come up in every coastal conversation, and only one of them is for apartment buildings.

• C-MAPThe Coastal Market Assistance Program helps coastal homeowners who have been non-renewed find coverage. The state describes it as a program for owner-occupied one-to-four family dwellings, generally within one mile of the shore on the south shore and the forks and within 2,500 feet on the north shore. An investor-owned apartment building is not what it was built for.
• NYPIUAThe New York Property Insurance Underwriting Association, the state’s FAIR plan, does write commercial buildings. Its basic form is fire and extended coverage, which includes wind and hurricane.
• What NYPIUA leaves outNo liability, no flood and no theft. Policies are generally written at actual cash value, and limits are capped by statute at amounts that depend on construction; frame buildings get the lowest cap.
• Its hurricane deductibleBroad-form policies on properties in Nassau and Suffolk carry a two percent hurricane deductible, applied from 12 hours before to 12 hours after a category 2 or stronger hurricane makes landfall anywhere in New York State.
• TimingThe Association stops binding new or increased windstorm coverage while a hurricane or tropical storm is inside a set box of coordinates off the coast, until 24 hours after it leaves.

In practice a hard-to-place complex often ends up layered: the Association or a surplus lines insurer for fire and wind, a separate liability policy, flood, and a commercial umbrella on top.

Town rental permits and village rent rules

Each of the three largest towns has its own rental law, and all three reach apartment buildings, not only single-family rentals:

• Town of HempsteadChapter 99 makes it unlawful to rent a dwelling unit without a rental occupancy permit. It applies in the Town outside its incorporated villages, defines dwelling units to include apartment houses and garden apartments, requires an on-site inspection, and runs for two years. The permit does not transfer; a buyer must register within 30 days of closing.
• Town of IslipThe Town’s rental dwelling unit law likewise requires a rental occupancy permit before a unit is rented to anyone other than the owner, with an on-site inspection and a two-year term.
• Town of BrookhavenChapter 82 requires a rental registration from the Chief Building Inspector, valid for 15 months, after a Town inspection or a report from a state-licensed engineer or architect. Applicants swear that there are no outstanding violations on the property. Fire Island is regulated separately.

A lapsed permit matters to an insurer for two reasons. It is the first thing a plaintiff’s lawyer finds after an injury, and rebuilding after a fire goes through the same building department. Ordinance or law coverage pays for the code upgrades that rebuild requires.

Rent rules are local too. The state housing agency says rent stabilization outside New York City, under the Emergency Tenant Protection Act, applies to buildings of six or more units built before January 1, 1974, only in localities that adopted it. In Nassau its list includes the cities of Glen Cove and Long Beach, the Town of North Hempstead and villages such as Freeport, Hempstead, Mineola, Lynbrook, Rockville Centre and Great Neck; some municipalities limit it to larger buildings. No Suffolk municipality is on the list, dated November 2024. Where a building is covered, size loss of rents to the regulated rent roll. How income coverage works.

What to send me

• Address of every building, year built, stories, unit count and construction, and whether the property is in a village or the unincorporated town.
• Distance to the nearest salt water, the flood zone, and an elevation certificate if one exists.
• Roof details by building: age, covering, shape and last replacement.
• Current declarations pages, with the wind or named-storm deductible wording, plus flood, liability and umbrella.
• Five years of loss runs, including anything from Sandy or later storms and what was rebuilt.
• The rental permit or registration, its expiration date, and any open town, village or fire marshal violations.
• The rent roll, marked to show any units under the Emergency Tenant Protection Act, and a recent operating statement.
• Updates with years: wiring, plumbing, heating plant, and any equipment raised above flood level.

Common questions

General information about insuring apartment buildings in Nassau and Suffolk counties as of November 2026, not legal advice. Deductible triggers are set by each policy; rental permit rules by each town or village; rent stabilization by local adoption. Confirm your property’s status with the building department that has jurisdiction and with the state Division of Housing and Community Renewal. Coverage depends on underwriting and the terms, conditions and exclusions of the policy actually issued.