Welcome to 25 William St, Central Islip an oversized property offering comfort, versatility and endless possibilities. This well maintained residence features 4 generously sized bedrooms and 3 full bathrooms, providing plenty of space for today's lifestyle. Step inside and discover a bright, welcoming layout designed for comfortable everyday living and entertaining. The full basement offers excellent potential for recreation, storage or future customization to suit your needs. Additional highlights include oil heating, oil fuel and three cesspools adding functionality to the property. The partially fenced yard provides the perfect outdoor space to relax, garden or entertain family and friends. Conveniently located near schools, shopping, restaurants, parks and public transportation, this home offers easy access to all the amenities Central Islip has to offer. With its spacious layout, great potential and convenient location, this is an outstanding opportunity to make 25 William St your next home. Come see all the possibilities this wonderful property has to offer!
For sale
$675,000
25 William Street, Central Islip, NY 11722
4beds
1,460sqft
Single Family Residence, Residential
Built in 1870
0.35 Acres Lot
$-- Zestimate®
$462/sqft
$-- HOA
What's special
Partially fenced yardBright welcoming layoutSpacious layout
- 42 days
- 328
- 21
Zillow last checked:
Listing updated:
Listed by:
ARVY Realty 631-617-5135,
Maria R. Zelaya 631-697-3833
Source: OneKey® MLS as distributed by MLS GRID,MLS#: 1026610
Facts & features
Interior
Bedrooms & bathrooms
- Bedrooms: 4
- Bathrooms: 3
- Full bathrooms: 3
Other
- Description: Living Room, Eat-in Kitchen, 1 Bedroom, and 1 Full Baths
- Level: First
Other
- Description: 3 Bedrooms and 1 Full bathrooms
- Level: Second
Basement
- Description: Full and finished basement
- Level: Basement
Heating
- Oil, Other
Cooling
- None
Appliances
- Included: Range, Refrigerator
Features
- Galley Type Kitchen, Other
- Flooring: Laminate
- Basement: Finished,Full
- Attic: Unfinished
- Has fireplace: No
Interior area
- Total structure area: 1,586
- Total interior livable area: 1,460 sqft
Property
Parking
- Parking features: Driveway, Off Street, On Street, Private
- Has uncovered spaces: Yes
Features
- Fencing: Partial
Lot
- Size: 0.35 Acres
- Features: Near Public Transit, Near School, Near Shops
Details
- Parcel number: 0500099000200022002
- Special conditions: None
Construction
Type & style
- Home type: SingleFamily
- Architectural style: Colonial
- Property subtype: Single Family Residence, Residential
Materials
- Frame
Condition
- Year built: 1870
Utilities & green energy
- Sewer: Cesspool
- Water: Public
- Utilities for property: Electricity Available, Sewer Available, Water Available
Community & HOA
HOA
- Has HOA: No
Location
- Region: Central Islip
Financial & listing details
- Price per square foot: $462/sqft
- Tax assessed value: $22,700
- Annual tax amount: $7,939
- Date on market: 7/24/2026
- Cumulative days on market: 43 days
- Listing agreement: Exclusive Right To Sell
- Electric utility on property: Yes
Estimated market value
Not available
Estimated sales range
Not available
Not available
Price history
| Date | Event | Price |
|---|---|---|
| 7/24/2026 | Listed for sale | $675,000+2.4%$462/sqft |
Source:  OneKey® MLS as distributed by MLS GRID #1026610 Report a problem | ||
| 2/17/2026 | Listing removed | $659,000$451/sqft |
Source: OneKey® MLS as distributed by MLS GRID #957106 Report a problem | ||
| 2/6/2026 | Listed for sale | $659,000+128.3%$451/sqft |
Source: OneKey® MLS as distributed by MLS GRID #957106 Report a problem | ||
| 6/5/2006 | Sold | $288,650+11446%$198/sqft |
Source: Public Record Report a problem | ||
| 8/20/1998 | Sold | $2,500$2/sqft |
Source: Public Record Report a problem | ||
Public tax history
| Year | Property taxes | Tax assessment |
|---|---|---|
| 2025 | -- | $22,700 |
| 2024 | -- | $22,700 |
| 2023 | -- | $22,700 |
| 2022 | -- | $22,700 |
| 2021 | -- | $22,700 |
| 2020 | -- | $22,700 |
| 2019 | -- | $22,700 |
| 2018 | -- | $22,700 |
| 2017 | $6,459 | $22,700 |
| 2016 | -- | $22,700 |
| 2015 | -- | $22,700 |
| 2014 | -- | $22,700 |
| 2013 | -- | $22,700 |
| 2012 | -- | $22,700 |
| 2011 | -- | $22,700 |
| 2010 | -- | $22,700 |
| 2009 | -- | $22,700 |
| 2008 | -- | $22,700 |
| 2007 | $5,586 +11.9% | $22,700 |
| 2005 | $4,994 +7.2% | $22,700 |
| 2004 | $4,657 +7.5% | $22,700 |
| 2003 | $4,332 +4.4% | $22,700 |
| 2002 | $4,148 | $22,700 |
| 2001 | -- | $22,700 |
| 2000 | $3,758 | $22,700 |
Find assessor info on the county website
Monthly payment
Climate risks
Neighborhood: 11722
Nearby schools
Schools provided by the listing agent
- Elementary: Anthony Alfano Elementary School
- Middle: Ralph Reed School
- High: Central Islip Senior High School
Source: OneKey® MLS as distributed by MLS GRID. This data may not be complete. We recommend contacting the local school district to confirm school assignments for this home.
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