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Mount Sinai, NY Homes for Sale | Realty.com

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Homes for Sale in Mount Sinai, NY

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4 Listings

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4 Listings

36Active
$748,000

Homes for Sale in Mount Sinai, NY

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4 Listings

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Homes for Sale in Mount Sinai, NY

4 Listings

Your local brokerage

Thomas O'Leary

Realty.com

Lic. #10311208632

Call Thomas

36Active
$748,000

Your local brokerage

Thomas O'Leary

Realty.com

Lic. #10311208632

Call Thomas

3 bd · — ba · 2,200 sqft

137 Constantine Way, Mount Sinai, NY

50Active

$925,000

3 bd · — ba · 2,362 sqft

8 Hyanis Court, Mount Sinai, NY

Price Reduced45Active

$640,000

2 bd · — ba · 1,274 sqft

7 Pond Circle, Mount Sinai, NY

Your local brokerage

Thomas O'Leary

Realty.com

Lic. #10311208632

Call Thomas

Price Reduced17Active

$765,000

4 bd · — ba · 1,800 sqft

10 George Hill Road, Mount Sinai, NY

Listing data & MLS disclosures

NY State MLS: The data relating to real estate for sale on this website comes in part from the Internet Data exchange (IDX) program of the New York State Alliance MLS. IDX information is provided exclusively for consumers' personal, non-commercial use and may not be used for any purpose other than to identify prospective properties consumers may be interested in purchasing. Real estate listings held by brokerage firms other than Realty.com, are indicated by detailed information about them such as the name of the listing firms. All information deemed reliable but not guaranteed and should be independently verified. All properties are subject to prior sale, change or withdrawal. Neither the listing broker(s) nor Realty.com shall be responsible for any typographical errors, misinformation, misprints, and shall be held totally harmless. Copyright © 2026 New York State Alliance and participating MLS's - CNYIS, UNYREIS and WNYREIS. All Rights Reserved.

Mount Sinai housing market

September 2026

Selling at 101.5% of asking price

Buyers here are paying above asking. MLS · 14 sales · as of Sep 30, 2026

Homes that sold · County records, as of Sep 28, 2026

Median sale price: $784,500$593,000–$976,250 typical range
Price per sq. ft.: $369
Sales: 12
Paid in cash: 66.7%

Homes on the market · MLS, as of Sep 27, 2026–Sep 30, 2026

Median list price: $849,500
Homes for sale: 32
Median days on market: 22 days

Price trend · Assessor repeat sales, as of Sep 30, 2026

Year-over-year: -2.9%

Housing stock — every home in the area, not only the ones selling or listed · Assessor records, as of Sep 9, 2026

Median home size: 2,142 sq. ft.

Mount Sinai, NY community profile

Area: 7.5 sq. mi.

Source: HJN community data

Nearby areas

ZIP codes

11746 (105)
11727 (100)
11772 (100)
11901 (86)
11706 (82)
11951 (82)
11967 (70)
11757 (64)

Cities

Brookhaven (1,214)
Islip (410)
Huntington (287)
Babylon (249)
Smithtown (184)
Riverhead (162)
Southampton (135)
West Babylon (40)

L. Custen Realty, Inc. d/b/a Realty.com/L. Custen Realty CT, LLC d/b/a Realty.com (Tom O’Leary-Broker)(CT properties only), 8323 Southwest Freeway, Suite 900, Houston, Texas 77074

The information provided by this website is for the personal, non-commercial use of consumers and may not be used for any purpose other than to identify prospective properties consumers may be interested in purchasing. Listing data is derived from various Multiple Listing Services; each source MLS and its required disclaimer are shown with the listings on the applicable page. Realty.com is an independently owned and operated brokerage.

Your local brokerage

Thomas O'Leary

Realty.com

Lic. #10311208632

Call Thomas

Listing data & MLS disclosures

NY State MLS: The data relating to real estate for sale on this website comes in part from the Internet Data exchange (IDX) program of the New York State Alliance MLS. IDX information is provided exclusively for consumers' personal, non-commercial use and may not be used for any purpose other than to identify prospective properties consumers may be interested in purchasing. Real estate listings held by brokerage firms other than Realty.com, are indicated by detailed information about them such as the name of the listing firms. All information deemed reliable but not guaranteed and should be independently verified. All properties are subject to prior sale, change or withdrawal. Neither the listing broker(s) nor Realty.com shall be responsible for any typographical errors, misinformation, misprints, and shall be held totally harmless. Copyright © 2026 New York State Alliance and participating MLS's - CNYIS, UNYREIS and WNYREIS. All Rights Reserved.

Nearby areas

ZIP codes

11746 (105)
11727 (100)
11772 (100)
11901 (86)
11706 (82)
11951 (82)
11967 (70)
11757 (64)

Cities

Brookhaven (1,214)
Islip (410)
Huntington (287)
Babylon (249)
Smithtown (184)
Riverhead (162)
Southampton (135)
West Babylon (40)

Mount Sinai, NY community profile

Area: 7.5 sq. mi.

Source: HJN community data

Mount Sinai housing market

September 2026

Selling at 101.5% of asking price

Buyers here are paying above asking. MLS · 14 sales · as of Sep 30, 2026

Homes that sold · County records, as of Sep 28, 2026

Median sale price: $784,500$593,000–$976,250 typical range
Price per sq. ft.: $369
Sales: 12
Paid in cash: 66.7%

Homes on the market · MLS, as of Sep 27, 2026–Sep 30, 2026

Median list price: $849,500
Homes for sale: 32
Median days on market: 22 days

Price trend · Assessor repeat sales, as of Sep 30, 2026

Year-over-year: -2.9%

Housing stock — every home in the area, not only the ones selling or listed · Assessor records, as of Sep 9, 2026

Median home size: 2,142 sq. ft.