21 Bay 3rd St Islip, NY 11751
Islip AreaEstimated payment $4,188/month
Highlights
- Cape Cod Architecture
- Wood Flooring
- 1 Car Detached Garage
- Islip High School Rated A-
- Formal Dining Room
- Galley Kitchen
About This Home
Welcome to this charming 1930 Cape Cod located mid-block in the desirable St. Marks neighborhood south of Montauk Highway. Filled with character and thoughtful updates, this home features original built-ins in the kitchen, dining room, and primary bedroom, hardwood floors in the living and dining room, and a beautifully renovated bathroom with classic octagon ceramic tile. Four energy-efficient split units provide heating and air conditioning, complemented by smart thermostats, a new gas heating system, separate hot water heater, and 200-amp electric service. Flexible bonus spaces offer the perfect home office and playroom/Den. Enjoy front and rear in-ground sprinklers, low taxes, and an unbeatable location just minutes from Islip Beach, the marina, parks, shopping, restaurants, and the Long Island Railroad. A wonderful opportunity to own a home that blends timeless charm with today's modern conveniences.
Listing Agent
Netter Real Estate Inc Brokerage Phone: 631-661-5100 License #30RA0710618 Listed on: 08/06/2026
Co-Listing Agent
Netter Real Estate Inc Brokerage Phone: 631-661-5100 License #10401320789
Home Details
Home Type
- Single Family
Est. Annual Taxes
- $10,711
Year Built
- Built in 1929 | Remodeled in 2021
Lot Details
- 6,098 Sq Ft Lot
- Lot Dimensions are 60x106
- South Facing Home
- Back and Front Yard
Parking
- 1 Car Detached Garage
- Driveway
- Off-Street Parking
Home Design
- Cape Cod Architecture
- Frame Construction
Interior Spaces
- 1,188 Sq Ft Home
- 2-Story Property
- Entrance Foyer
- Formal Dining Room
- Wood Flooring
Kitchen
- Galley Kitchen
- Convection Oven
- Gas Oven
- Gas Cooktop
Bedrooms and Bathrooms
- 2 Bedrooms
- Bathroom on Main Level
- 1 Full Bathroom
- Low Flow Plumbing Fixtures
Laundry
- Laundry Room
- Dryer
- Washer
Partially Finished Basement
- Basement Fills Entire Space Under The House
- Laundry in Basement
Schools
- Maud S Sherwood Elementary School
- Islip Middle School
- Islip High School
Utilities
- Ductless Heating Or Cooling System
- Hot Water Heating System
- Heating System Uses Steam
- Heating System Uses Natural Gas
- Natural Gas Connected
- Gas Water Heater
Listing and Financial Details
- Legal Lot and Block 17 / 0002
- Assessor Parcel Number 0500-397-00-02-00-017-000
Map
Home Values in the Area
Average Home Value in this Area
Tax History
We collect this data history from publicly available records. To have your information removed, we recommend requesting removal directly through your county’s website.
| Year | Tax Paid | Tax Assessment Tax Assessment Total Assessment is a certain percentage of the fair market value that is determined by local assessors to be the total taxable value of land and additions on the property. | Land | Improvement |
|---|---|---|---|---|
| 2025 | $10,112 | $29,650 | $10,700 | $18,950 |
| 2024 | $10,112 | $29,650 | $10,700 | $18,950 |
| 2023 | $10,112 | $29,650 | $10,700 | $18,950 |
| 2022 | $8,016 | $29,650 | $10,700 | $18,950 |
| 2021 | $8,016 | $29,650 | $10,700 | $18,950 |
| 2020 | $8,016 | $29,650 | $10,700 | $18,950 |
| 2019 | $8,016 | $0 | $0 | $0 |
| 2018 | -- | $29,650 | $10,700 | $18,950 |
| 2017 | $6,082 | $29,650 | $10,700 | $18,950 |
| 2016 | $6,082 | $29,650 | $10,700 | $18,950 |
| 2015 | -- | $29,650 | $10,700 | $18,950 |
| 2014 | -- | $29,650 | $10,700 | $18,950 |
Property History
We collect this data history from publicly available records. To have your information removed, we recommend requesting removal directly through your county’s website.
| Date | Event | Price | List to Sale | Price per Sq Ft | Prior Sale |
|---|---|---|---|---|---|
| 08/06/2026 08/06/26 | For Sale | $599,995 | +33.3% | $505 / Sq Ft | |
| 12/24/2021 12/24/21 | Sold | $450,000 | 0.0% | $379 / Sq Ft | View Prior Sale |
| 09/30/2021 09/30/21 | Pending | -- | -- | -- | |
| 08/24/2021 08/24/21 | For Sale | $449,999 | 0.0% | $379 / Sq Ft | |
| 08/16/2021 08/16/21 | Off Market | $450,000 | -- | -- | |
| 07/07/2021 07/07/21 | Price Changed | $479,000 | -4.0% | $403 / Sq Ft | |
| 06/15/2021 06/15/21 | For Sale | $499,000 | -- | $420 / Sq Ft |
Source: OneKey® MLS
MLS Number: 1023939
APN: 0500-397-00-02-00-017-000
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