Skip to content
Skip to content
TopHapOpen in map
Single Family ResidenceResidential
$935,591
TopHap EstimateOur estimate of what this home would sell for today, based on nearby sales, the home's size and features, and local price trends. It is a starting point, not an appraisal.· confidence 93How well the pricing models agreed with each other on this home. Higher means the estimate rests on stronger, more consistent data.· as of Sep 24, 2026

18 PROVOST AVE

NY
0
Baths
0.53 ac
Lot SizeThe size of the land the home sits on, from county records.

Valuation

$936K
$870K low$1M high

Tax & Assessment

Assessed ValueThe value the county assigns to this home to calculate property tax. It is often lower than what the home would sell for.$55,600 (2025)
Assessed LandThe share of the county's assessed value that comes from the land itself, not the buildings.$21,800
Assessed ImprovementsThe share of the county's assessed value that comes from the buildings and other structures on the land.$33,800
Assessor Market ValueThe county assessor's own opinion of market value. It is separate from our estimate and updates on the county's schedule.$783,098

Climate Risk

Projected Flood DepthHow deep a serious flood is expected to get here at some point in the next 30 years. Shown in inches.36 in
30-Year Flood ChanceThe chance of at least one serious flood here in the next 30 years, not in any single year.45%
FEMA Flood ZoneFEMA's flood zone for this address. Zones starting with A or V are high risk, and lenders usually require flood insurance there.minimal

Scores 0–100; higher = greater projected risk.

Property Facts

Property TypeThe broad category the county puts this property in, such as residential or commercial.Single Family Residence
CountySUFFOLK
Lot (acres)The size of the land the home sits on, from county records.0.53
PoolWhether the property has a pool, and what kind, such as in-ground.No

Transaction History(1)

Sales and refinances filed with the county for this home. Not every transfer is a normal sale, so check the type before comparing prices.

Assigned SchoolsThe public schools this address is zoned for. Boundaries change, so confirm with the district before you count on it.

E
Timber Point Elementary School
Elementary · Grades KG–2 · 1.0 mi
H
East Islip High SchoolB+
High · Grades 9–12 · 2.4 mi
M
East Islip Middle SchoolA
Middle · Grades 6–8 · 2.4 mi

District: East Islip Union Free School District

Owner Tools

Do you own this home?
Claim this home

Data by ATTOM. Valuations are automated estimates, not appraisals. Photos from Google Street View and may not depict the current property state.

How this home compares

18 Provost Ave measured against every home in its neighborhood, its ZIP code and its county, using county assessor records refreshed nightly. A home can stand out in one of those areas and look ordinary in another, because each one holds a different mix of homes.

  • Worth less than 85% of homes in Great River
  • Has a bigger lot than 79% of homes in Suffolk County

How it measures up in Great River

The dot is this home. The mark in the middle is the typical home in Great River.

Estimated value$935,591
CheaperTypical $1,143,230Pricier

Pricier than 15% of homes nearby

Lot size0.53 ac
SmallerTypical 0.47 acBigger

Bigger than 64% of homes nearby

How 18 Provost Ave ranks against every home in each area.
MeasureThis homeGreat RiverSuffolk County
Estimated valuepricier than$935,59115% of homes76% of homes
Lot sizebigger than0.53 ac64% of homes79% of homes

About 18 Provost Ave

How much is 18 Provost Ave, , NY worth?

The TopHap Estimate for 18 Provost Ave, , NY is $935,591 as of Sep 24, 2026. The likely range is $869,753 to $1,001,429. The estimate is modelled from recorded sales, assessments and the property's own characteristics — it is not an appraisal.

When did 18 Provost Ave, , NY last sell?

18 Provost Ave, , NY last sold on Jan 1, 1900, according to the county's recorded deed.

What schools serve 18 Provost Ave, , NY?

18 Provost Ave, , NY is assigned to Timber Point Elementary School (elementary); East Islip High School (high), rated B+; East Islip Middle School (middle), rated A. All sit in East Islip Union Free School District. Attendance boundaries change — confirm with the district before relying on an assignment.

How does 18 Provost Ave, , NY compare to other homes in Great River?

Among the 582 homes in Great River, it is worth more than 15% of them ($935,591 against a typical $1,143,230) and its lot is bigger than 64% of them (0.53 ac against a typical 0.47 ac). Measured against all of Suffolk County, it is worth more than 76% of homes there. These shares are recounted nightly from the full county assessor record for each area, not from active listings.

Closest homes

Assigned schools

Explore the area

See this home in context

Open 18 Provost Ave on TopHap’s interactive map to compare it against every sale nearby, overlay school zones and flood risk, and run a CMA.

Open in map
A flyover of TopHap's photorealistic 3D map, with recorded sale prices pinned to homes
Search any address, city, zip, or county…3D$1.9M$6.25MOpen in map