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$799,999

  • For Sale
  • Active
  • Single Family
  • 4 Beds
  • 2 Full Baths
  • 1 Partial Bath
  • 1 Car Garage
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Welcome to this beautifully expanded 4 bedroom, 2.5 bath colonial located on a quiet block in the Mount Sinai School District. This well maintained home offers a spacious layout featuring a large cozy living room w/ gas fireplace, formal dining room and eat-in kitchen w/ stainless steel appliances and walk-in pantry. The primary bedroom boasts vaulted ceilings and inviting sitting area ideal for a home office, vanity, or reading nook. A full finished basement provides additional living space. Home is equipped with central air conditioning, separate hot water heater and in ground sprinklers. Situated on a generous 0.37-acre lot, the private backyard is your own oasis, featuring a heated in-ground pool and Trex Deck, perfect for relaxing and entertaining. Enjoy the welcoming front porch and beautifully landscaped property. Conveniently located near downtown Port Jefferson's waterfront, marinas, restaurants, and shopping. WELCOME HOME!

Full Property Details for 9 Mt Sinai Ave S

General

  • Price: $799,999
  • Taxes: $14,185
  • Status: Active
  • Type: Single Family
  • Source: Long_Island
  • MLS ID: 1034421
  • Updated: 8/8/2026
  • Added to Site: 24 day(s) ago

Interior

  • Number of Rooms: 7
  • Interior Features: Eat-in Kitchen
  • Fireplace: Yes
  • Number of Fireplaces: 1
  • Fireplace(s): Gas, Living Room
  • Appliances: Dishwasher, Dryer, Electric Range, Electric Water Heater, Refrigerator, Washer

Rooms

Bathrooms

  • Total Bathrooms: 3
  • Full Bathrooms: 2
  • Half Bathrooms: 1

Bedrooms

  • Total Bedrooms: 4

Additional Information

  • Pool: Yes
  • Private Pool: Yes

Exterior

  • Porch/Patio/Deck: Deck, Porch

Parking

  • Garage: Yes
  • Garage Spaces: 1
  • Parking Features: Driveway

Location

  • County: Suffolk County

School Information

  • High School District: Mount Sinai
  • Elementary School: Mt Sinai Elementary School
  • Middle School: Mt Sinai Middle School
  • High School: ROBERT M GRABLE JR MOUNT SINAI HIGH SCHOOL

Heating & Cooling

  • Central air: Yes
  • Cooling Type: Central Air
  • Heating Type: Baseboard
  • Heating Zones: 2

Utilities

  • Sewer: Cesspool
  • Water: Public
  • Utility Description: Electricity Connected, Propane, Water Connected

Structural Information

  • Architectural Style: Colonial
  • Detached/Attached: Detached
  • Construction: Vinyl Siding
  • Basement: Yes
  • Basement Desc.: Finished
  • Sq. Ft. Source: Other
  • Year Built: 1974

Lot Features

  • Lot Size (Acres): 0.37
  • Lot Size (Sq. Ft.): 16,117

Financial Considerations

  • Tax Amount: $14,185

Disclosures and Reports

  • Special Conditions: None
  • Property ID: 0200-231.00-03.00-021.000

Listed by Signature Premier Properties

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Listing agent

— 9 Mt Sinai Ave S —

  • Signature Premier Properties

516-799-7100

Get Pre-Approved Today

Be ready to buy your new home!

with our affiliated lender
NMLS#: 1598647

Get Pre-Approved

Be ready to buy your new home!

with our affiliated lender
NMLS#: 1598647

Get Pre-Approved

Schools serving 9 Mt Sinai Ave S

School District:Mount Sinai Union Free School District
NameGradesDistance
Mount Sinai Middle School
114 North Country Road, Mount Sinai, NY 11766
5-81.8 mi
Mount Sinai Elementary School
118 North Country Road, Mount Sinai, NY 11766
K-43.1 mi
Mount Sinai High School
110 North Country Road, Mount Sinai, NY 11766
9-121.9 mi
Disclaimer: School attendance boundaries provided by ATTOM Data Solutions and are for reference only. Contact the school directly to verify enrollment eligibility.

Price & Sales History for 9 Mt Sinai Ave S Get Price Alerts and Save Property

Date
Details
Price
Change
Source
8/04/2026
Listed
$799,999
66.7%
MLS
1/05/2018
Sold
$479,900
—
Public Record
Get Price Alerts and Save Property
Disclaimer: Historical sales information is derived from public records provided by the county offices. Information is not guaranteed and should be independently verified.

Tax History for 9 Mt Sinai Ave S

Year
Property Taxes
Change
Tax Assessment
Change
2024
$12,978
100%
$3,155
—
2020
100%
$3,155
—
2022
-100%
$3,155
—
2016
$9,341
-22%
$3,155
—
2020
$11,989
2%
$3,155
—
2018
$11,765
14%
$3,155
—
2017
$10,329
10%
$3,155
9%
2016
$9,406
1%
$2,905
—
2015
$9,299
2%
$2,905
—
2015
$9,143
1%
$2,905
—
2014
$9,061
-9%
$2,905
—
2013
$9,943
—
$2,905
—
View All
Disclaimer: Historical tax information is derived from public records provided by the county offices. Information is not guaranteed and should be independently verified.

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*These costs are estimates, and the interest rates assume exceptional credit standing.

Listed by Signature Premier Properties

9 Mount Sinai Avenue S, Port Jefferson Station, NY 11776 (MLS# 1034421) is a Single Family property with 4 bedrooms, 2 full bathrooms and 1 partial bathroom. 9 Mount Sinai Avenue S is currently listed for $799,999 and was received on August 04, 2026. Want to learn more about 9 Mount Sinai Avenue S? Do you have questions about finding other Single Family real estate for sale in Port Jefferson Station? You can browse all Port Jefferson Station real estate or contact a Coldwell Banker agent to request more information.

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