By Paul Della · Licensed Insurance Agent · The Della Agency
In Smithtown, the water that worries homeowners isn't only the Sound. It's the Nissequogue River after a cloudburst, groundwater rising into a basement in Nesconset, and a bluff wearing away in Kings Park. Here's how home insurance in Smithtown, NY should be built for all three, from our licensed team in North Babylon.
Home insurance in Smithtown, NY works best when it's built around the town's real water risks, not just its zip code. New York regulators say a standard homeowners policy doesn't cover flood, and Smithtown floods have come from the Nissequogue River, rain and groundwater, not only the Sound. Check four things:
- Dwelling coverage set to what it would cost to rebuild your house, plus ordinance-or-law coverage if it's older.
- A separate flood policy if you're near the Nissequogue, Stony Brook Harbor or a low-lying road. NFIP coverage usually starts 30 days after purchase.
- A water backup endorsement if you have a finished basement or a sump pump.
- Your hurricane deductible written as a dollar figure, not just a percentage.
Do this: send us your declarations page and your street. We'll show you where those four pieces stand.
You bought in Smithtown for the schools, the parks and the quiet streets, and you probably never thought of yourself as a flood-risk homeowner. Then August 2024 happened: mill dams gave way, water ran through the Head of the River area, and Town Hall's basement flooded. If you're wondering whether your home insurance in Smithtown, NY would have handled a night like that, it's the right question. The answer usually turns on three things: how close you are to moving water, what's below grade, and how old the house is.
We're a North Babylon agency serving Smithtown, based at 1135 Deer Park Ave. We don't have an office in Smithtown. This guide is built from the Town's own hazard records and New York's insurance rules. For the bigger picture, see our Suffolk County home insurance tips, how to choose home insurance on Long Island and our New York home insurance guide.
What Makes Home Insurance in Smithtown Different?
The short answer: Smithtown pairs high-value, owner-occupied homes with a North Shore coastline, a river whose flood zone reaches deep inland, and pockets of high groundwater. That mix creates flood and erosion exposures a standard homeowners policy doesn't cover on its own.
According to the Town's About Smithtown page, Smithtown was founded in 1665 and is made up of six hamlets (Kings Park, Smithtown, St. James, Nesconset, Commack and Hauppauge) plus parts of Fort Salonga and Lake Ronkonkoma. Three incorporated villages sit inside it: the Village of the Branch, Head of the Harbor and Nissequogue. Its four town beaches are Short Beach, Long Beach, Kings Park Bluff and Callahan's Beach.
As of October 2026, U.S. Census Bureau QuickFacts for Smithtown town (villages included) shows 116,847 residents (July 1, 2025 estimate) and 39,611 households, with 88.7% of homes owner-occupied and a median owner-occupied home value of $669,900 (2020–2024).
One caution: a median home value is a market price that includes land. Your dwelling coverage should match what it would cost to rebuild the house itself, which can be higher or lower.
What Kinds of Homes Do Smithtown Policies Have to Cover?
The short answer: Everything from 18th- and 19th-century houses near the water to dense quarter-acre blocks in San Remo, two-acre village lots and new condos. Each raises a different question, from code upgrades to replacement cost.
Smithtown's draft Local Waterfront Revitalization Program notes "many houses in the waterfront area that were built in the eighteenth and nineteenth centuries." It describes San Remo as "almost fully developed with high density, single and some multifamily residential uses," with quarter-acre lots common there and around Upper Dock Road, while Fort Salonga is low-density single-family. Suffolk County's hazard plan annexes for Nissequogue and Head of the Harbor (August 2020) describe both villages as zoned mainly for two-acre lots and heavily wooded. And the Town says it is now "focusing residential development on condos and apartments."
- Older and historic houses can cost more to rebuild than their age suggests, and codes have moved on. The Insurance Information Institute describes an ordinance-or-law endorsement as one that "pays a specified amount toward bringing a house up to code during a covered repair." See our guide to insuring older homes on Long Island.
- Wooded village lots raise tree-fall and replacement-cost questions. See replacement cost vs. actual cash value.
- New condos split coverage between the association's master policy and your unit policy.
According to the Town of Smithtown's building FAQ, simple re-shingling doesn't need a permit, but a new roofline, gables or pitches do, and New York's code allows a maximum of two layers of shingles. Keep the date and receipt whenever the roof is redone. Roof age is a detail we want on file, as our Long Island home insurance discounts guide explains.
Where Does Flooding Actually Happen in Smithtown?
The short answer: Along the Nissequogue River and its branches, on low coastal roads near Long Beach and Short Beach, around Stony Brook Harbor, and in high-groundwater neighborhoods. Much of it has nothing to do with ocean surge.
The Town's chapter of Suffolk County's draft 2026 Hazard Mitigation Plan names four bodies of water: the Nissequogue River, Stony Brook Harbor, Smithtown Bay and Long Island Sound. The Town's draft waterfront plan adds that the coastal flood hazard area reaches furthest inland along the Nissequogue, as far south as Caleb Smith State Park. The draft plan gets specific:
- Mapped flood zones. "There are 26 buildings located in SFHAs in the unincorporated portion of the Town," about eight of them homes, plus roughly 50 buildings in the villages of Nissequogue and Head of the Harbor. (An SFHA is FEMA's high-risk flood zone.)
- High groundwater. About 1,500 structures sit where groundwater is less than 10 feet below grade, "subject to basement/subsurface flooding as well as stormwater-related flooding." The plan names Brooksite Drive and the northeast branch of the Nissequogue, Nichols Road in Nesconset, and Lake Ronkonkoma, "a hotspot for groundwater flooding."
- St. James. "St. James has repetitive flooding issues," and a Town flood study is planned.
- Low roads. Long Beach Road "is low lying and prone to flooding," and the Town has raised about 1,500 feet of it. On Short Beach Road, four homes are cut off during floods, and raising it with the Village of Nissequogue is in progress.
The plan also warns that many high-groundwater homes "have basements, septic systems and accessory structures that may not be eligible for NFIP coverage."
| Smithtown situation | Coverage that typically responds | In a standard policy? |
|---|---|---|
| The Nissequogue spills into a Head of the River home | Flood policy (NFIP or private) | No — separate policy |
| A sump pump fails in a Nesconset downpour | Water backup endorsement | No — add-on |
| An oak falls on a Head of the Harbor roof in a nor'easter | Homeowners dwelling coverage | Yes, minus deductible |
| A landfalling hurricane strips shingles in Kings Park | Homeowners, with hurricane deductible | Yes, % deductible |
| A bluff-top yard slumps toward the Sound in Fort Salonga | Generally excluded as earth movement | No — check exclusions |
| A 19th-century house must be repaired to today's code | Ordinance-or-law coverage | Limited — check policy |
What Did the August 2024 Flash Flood Teach Smithtown Homeowners?
The short answer: That a Smithtown flood can come from the sky, not the Sound. An overnight deluge overwhelmed dams and river channels, flooded homes and basements far from the beach, and showed exactly where a homeowners policy stops.
At 1:20 a.m. on August 19, 2024, the National Weather Service in Upton declared a "FLASH FLOOD EMERGENCY for Northwestern Suffolk County," naming Smithtown. A follow-up said radar showed 6 to 10 inches of rain since 9 p.m., at up to 3 to 4 inches an hour.
The Town's chapter of the draft 2026 hazard plan records the damage under disaster declaration DR-4839-NY: "Flash flooding destroyed two historic mill dams at Stony Brook Grist Mill and Blydenburgh Park" and "inundated 5 homes in the Head-of-the-River area as well as basement levels of Town Hall and the Main Branch of the Smithtown Library." It estimates property damage at $10,655,000. The same plan logs a 2021 flash flood "including Smithtown, Nesconset, and Lake Grove."
New York's Department of Financial Services is clear that "insurance coverage for losses resulting from floods or mudslides is not provided in standard homeowners or unit policies." Flood takes a separate policy, such as one through the NFIP. DFS adds that some insurers offer an endorsement for sewer backups, including sump pump failure. Our guide to water backup vs. flood insurance in New York sorts out which is which.
A finished basement near the Nissequogue's northeast branch
A Smithtown family in one of the Town's listed high-groundwater areas has a finished basement and a sump pump. They carry a $10,000 water backup endorsement but no flood policy. In a cloudburst like August 2024's, the sump is overwhelmed first, then the nearby river branch spills through the basement windows.
Illustrative math only, not a quote or a claim promise. Say repairs total $38,000, and the adjuster attributes $9,000 to the sump backup before the river rose. The backup endorsement could respond for $8,000 ($9,000 minus a $1,000 deductible), subject to the policy's terms. The other $29,000 is surface flooding, and the homeowners policy pays $0 of it. Even a flood policy wouldn't cover much of a finished basement: FEMA says NFIP basement coverage is limited and excludes finished flooring and finished walls. The lesson: a Smithtown basement needs both coverages, and a clear view of what neither covers.
Does Homeowners Insurance Cover Bluff Erosion Along Smithtown Bay and the Sound?
The short answer: Generally not. Land sliding or wearing away is treated as earth movement, which standard homeowners policies exclude. On Smithtown's Sound-side bluffs, prevention and setbacks do more than insurance can.
Smithtown's draft waterfront plan describes "steep escarpments generally 50-125 feet in height" behind the beaches. The draft 2026 hazard plan ranks coastal erosion as a High hazard and says "Kings Park Bluff, Long Beach, Short Beach, Callahan's Beach are all greatly impacted." It also lists Tropical Storm Isaias (August 4, 2020, DR-4567-NY) as a FEMA project for "coastal erosion" and tree removal.
The Insurance Information Institute says a landslide "is considered an 'earth movement' event," excluded from standard homeowners policies. If you own on a bluff in Fort Salonga, Kings Park or Nissequogue, ask how your policy words that exclusion, and get any slope work permitted.
Kings Park, San Remo & Fort Salonga
Eroding bluffs at Kings Park Bluff and Callahan's Beach, and dense quarter-acre blocks in San Remo. Check erosion exclusions and rebuild limits.
Nissequogue & Long Beach
A peninsula whose one access road, the 2020 annex says, floods "a minimum of 24 times" a year. Flood coverage is a serious conversation.
Head of the Harbor
Stony Brook Harbor frontage, wooded two-acre lots and low roads like Mill Creek Road. Tree-fall, wind and flood all apply.
Smithtown & Village of the Branch
Historic homes and the Head of the River area that flooded in August 2024. Older houses need ordinance-or-law coverage.
St. James, Nesconset & Lake Ronkonkoma
Repetitive flooding in St. James and groundwater hotspots near Nichols Road and the lake. Water backup coverage matters.
Commack & Hauppauge
Inland hamlets away from the river and Sound. Town-wide, the plan calls downed trees and power outages "a big concern."
Does Smithtown's Flood Rating Lower Your Flood Insurance Cost?
The short answer: Not today. The Town doesn't participate in FEMA's Community Rating System, so NFIP policyholders get no community discount. Flood coverage is still available, but it usually takes 30 days to start.
The Community Rating System rewards towns for floodplain work with NFIP discounts. According to FEMA, a Class 10 community "is not participating in the CRS and receives no discount." The draft 2026 hazard plan lists the Town's CRS participation as "No," and the draft 2026 annexes for Nissequogue and Head of the Harbor say the same.
The plan's NFIP table (data received January 27, 2026) shows 251 policies, 318 claims and $1,573,515 in total payments, with 21 repetitive-loss properties. Flood-zone building falls under Town Code Chapter 168, the current flood maps date to September 25, 2009, and the Town's floodplain permit requires a certified as-built lowest-floor elevation.
FEMA's FloodSmart says NFIP coverage "will go into effect 30 days after your date of purchase," with exceptions such as buying at a mortgage closing. Our Long Island flood insurance guide covers zones and limits.
How Do Hurricane Deductibles and Tree Damage Work for Smithtown Homes?
The short answer: Wind and falling trees go through your homeowners policy. If a hurricane makes landfall in New York, a percentage deductible can replace your flat one, so know its dollar value now.
New York's DFS says a hurricane deductible is "commonly 1% to 5%" of the dwelling's value or coverage. Under New York's rule, the hurricane deductible applies only if the weather service determines the hurricane made landfall in New York, and it covers wind damage from 12 hours before landfall until 12 hours after the last hurricane watch or warning ends. For example, on a $600,000 dwelling limit, a 2% deductible would be $12,000. Our New York hurricane deductible guide explains trigger language.
Wind is a real Smithtown exposure. The 2020 annex found Sandy did "minimal damage" to properties from flooding, and "more damage occurred as a result of wind damage to trees and structures." The draft 2026 plan ranks hurricanes and nor'easters High.
According to DFS, the Coastal Market Assistance Program (C-MAP) helps coastal homeowners who've received a non-renewal or cancellation for a reason other than non-payment. Under New York Insurance Law §5414, as amended in 2024, homes within at least one mile of the shore, including Long Island Sound and the bays, can be considered for C-MAP if they've been non-renewed or can't find coverage. The state's NYPIUA policies don't include liability, flood or theft coverage. See our coastal home insurance guide.
How Much Does Home Insurance Cost in Smithtown?
The short answer: No one can honestly give you a Smithtown average. The best published figure is statewide: New York's average homeowners premium was $1,628 in 2022, according to NAIC data published by the Insurance Information Institute. That's not a Smithtown quote.
The III table puts the U.S. average at $1,569 that year. Your premium depends on rebuild cost, roof age, distance to the water, claims history and deductibles, and flood is priced separately. Our guide to home insurance costs on Long Island explains each driver. For real numbers on your house, start with our home insurance page and a free review.
The Bottom Line for Smithtown Homeowners
Home insurance in Smithtown, NY should be built for water from every direction: the Nissequogue after a cloudburst, groundwater under Nesconset and St. James, tides on Long Beach Road and erosion on the bluffs. Set dwelling coverage to rebuild cost, add ordinance-or-law for an older house and water backup for a basement, buy flood coverage at least 30 days before you need it, and know your hurricane deductible in dollars.
Our team will review your policy for free and show you where those pieces stand, street by street.
More gaps to know: our guide to what an HO-3 doesn't cover on Long Island. Living next door? See our guides to home insurance in Huntington, Brookhaven and Islip.
Frequently Asked Questions
No. As of , the New York Department of Financial Services says losses from floods or mudslides are not covered by standard homeowners policies, and that flood coverage comes from a separate policy, such as one through the National Flood Insurance Program. That matters in Smithtown, where flooding often comes from the river and from rain, not the Sound. In August 2024, according to the Town's chapter of Suffolk County's draft 2026 hazard plan, flash flooding destroyed two historic mill dams and inundated five homes in the Head-of-the-River area. Near the Nissequogue, ask us about flood and water backup coverage.
Not currently. Suffolk County's draft 2026 Hazard Mitigation Plan lists the Town of Smithtown's Community Rating System participation as "No," and the plan's draft 2026 annexes say the villages of Nissequogue and Head of the Harbor don't participate either. FEMA explains that a Class 10 community is not participating in the CRS and receives no discount. So Smithtown NFIP policyholders don't get a community-level discount today. Flood insurance is still available, and the plan counts 251 NFIP policies in the Town. Your price depends on your building and its flood risk, so start with a quote on your address.
Usually 30 days. FEMA's FloodSmart site says NFIP coverage goes into effect 30 days after your date of purchase. There are exceptions: there's no wait when you buy while making, increasing, extending or renewing a mortgage, and a one-day wait applies if your property is newly mapped into a high-risk zone and you buy within 12 months. The lesson from August 2024 is that a Smithtown flash flood can arrive overnight. The National Weather Service issued that night's flash flood emergency at 1:20 a.m. Buy flood coverage on a calm week.
Generally not. The Insurance Information Institute says a landslide is considered an earth movement event and is excluded from standard homeowners policies. That's an important gap on Smithtown's Sound shore, where the Town's draft waterfront plan describes bluffs generally 50 to 125 feet high. Suffolk County's draft 2026 hazard plan ranks coastal erosion as a High hazard and says Kings Park Bluff, Long Beach, Short Beach and Callahan's Beach are all greatly impacted. If you live on or near a bluff, review your policy's earth-movement exclusion with us and keep records of permitted slope work.
It's a separate deductible for hurricane wind damage. New York's Department of Financial Services says it is commonly 1% to 5% of the dwelling's value or coverage amount. Under New York's rule, the hurricane deductible applies only if the weather service determines the hurricane made landfall in New York, and it covers wind damage from 12 hours before landfall until 12 hours after the last hurricane watch or warning ends. Smithtown is exposed: Suffolk County's draft 2026 hazard plan ranks hurricanes and nor'easters as High hazards for the Town, and its 2020 annex says that during Sandy, more damage here came from wind hitting trees and structures than from flooding. Multiply your percentage by your dwelling limit so you know the real dollar amount before a storm.
Get Your Free Smithtown Home Insurance Review
Near the Nissequogue, on a bluff or over a finished basement? Our North Babylon team will check your limits, flood and backup coverage, and hurricane deductible. Free, no obligation.
Prefer to call? We're in the office Mon–Fri, 9am–5pm.
✓ Last reviewed by the Della Agency team on . We refresh our guides quarterly.
General information, not a coverage or legal recommendation. Coverage depends on your policy and property. The scenario is illustrative, not a quote or claim decision. Figures from the draft 2026 Suffolk County hazard mitigation plan may change when the plan is finalized.
Written and reviewed by the Della Agency team, licensed New York insurance professionals at 1135 Deer Park Ave, North Babylon. We serve Suffolk and Nassau and are licensed in 10+ states. Figures come from the sources cited above, including the Census Bureau, the Town of Smithtown, Suffolk County, FEMA and the NY Department of Financial Services, and are reviewed quarterly.