Sean Mack Real Estate Agent - Hartnett Realty Solutions

10 Greystone Dr, Dryden, NY For Sale $299,400 - co-listed by Sean Mack — For Sale $299,400 • Co-Listing Agent

Sean Mack listing agent for 305 S Main St, Groton, NY - sold for $180,000 — Sold $180,000

1229 State Route 392, Cortland, NY Pending $149,900 - listed by Sean Mack — Pending $149,900

Sean Mack buyer's agent for 2027 Arcadia Dr Unit 12B, Cortland, NY - sold for $180,000 — Sold $180,000

52 Maple Ave, Cortland, NY For Sale $154,500 - co-listed by Sean Mack — For Sale $154,500 • Co-Listing Agent

Sean Mack

Cortland NY

Hartnett Realty Solutions

34 Closed Sales

$6.5M Total Value

$75K - $695K Price Range

$190.9K Average Price

Prior 5 years

About Sean

Been A Realtor for 39 years.

Home Types: House, Condo, Multifamily, Lot/Land, Mobile Homes, Commercial

Years of Experience: 42

Transaction History

1 Year
2 Year
5 Year

Seller Deals
Total Deals	7
Total Value	$1,838,500
Average Sale Price	$262,643
Price Range	$138K - $695K

Buyer Deals
Total Deals	3
Total Value	$438,900
Average Sale Price	$146,300
Price Range	$75K - $184K

1 Year View by Quarter

Seller Deals
Total Deals	11
Total Value	$2,494,670
Average Sale Price	$226,788
Price Range	$42K - $695K

Buyer Deals
Total Deals	5
Total Value	$873,900
Average Sale Price	$174,780
Price Range	$75K - $310K

Seller Deals
Total Deals	25
Total Value	$4,978,970
Average Sale Price	$199,159
Price Range	$42K - $695K

Buyer Deals
Total Deals	9
Total Value	$1,512,200
Average Sale Price	$168,022
Price Range	$59K - $360K

5 Year View

Neighborhoods Sean is Experienced In

Eastwood

1 Sale

Sean's Listings and Deals

Sean's Active Listings

Co-Listing Agent

$299,400
- 4 Beds
- 2 Baths
- 2,020 Sq Ft
10 Greystone Dr

Dryden, NY
Nestled in a desirable cul-de-sac within a charming Village of Dryden neighborhood, this spacious home offers exceptional versatility and comfort. Featuring 4–5 bedrooms, a large family room with a beautiful soapstone wood stove, and two full bathrooms—including a private bath in the primary suite—this property is designed to accommodate a variety of lifestyles. The updated kitchen showcases

Sean Mack Hartnett Realty Solutions

Co-Listing Agent

$154,500
- 7 Beds
- 3 Baths
- 2,160 Sq Ft
52 Maple Ave

Cortland, NY
This property has previously been rented to seven students and is currently tenant-occupied. It offers excellent versatility, making it suitable for a variety of owners or investment strategies. There is also strong potential to convert the home into a two-unit property with minimal effort. Conveniently located near downtown, shopping areas, and just minutes from SUNY Cortland. Call for details.

Sean Mack Hartnett Realty Solutions

$149,900

Pending
- 3 Beds
- 2 Baths
- 2,416 Sq Ft
1229 State Route 392

Cortland, NY
Great Virgil location offered in this spacious older home with 3 story barn and over 3 acre parcel! The barn roof was replaced approx. 6 years ago. Owner's improvements include barn roof, laminate flooring, updated plumbing, hot water heater and primary bedroom mini-split heater/ air conditioner. Other features include ,hardwoods in living room and dining room, vinyl windows, and all appliances.

Sean Mack Hartnett Realty Solutions

Recently Sold

$180,000

Sold Aug 6, 2026
- 3 Beds
- 1.5 Baths
- 1,200 Sq Ft
305 S Main St

Groton, NY
- 10% Below List
- 17 Days On Market
- $150/SF
- Current Est. Value $198K
Sean Mack Hartnett Realty Solutions

$220,000

Sold Jun 16, 2026
- 3 Beds
- 2 Baths
- 1,392 Sq Ft
4325 Cosmos Hill Rd

Cortland, NY
- 15% Below List
- 174 Days On Market
- $158/SF
- Current Est. Value $237K
Sean Mack Hartnett Realty Solutions

$180,500

Sold Dec 30, 2025
- 5 Beds
- 2.5 Baths
- 1,344 Sq Ft
1087 State Route 221

Marathon, NY
- 126 Days On Market
- $134/SF
- Current Est. Value $195K
Sean Mack Hartnett Realty Solutions

$245,000

Sold Nov 18, 2025
- 4 Beds
- 1 Bath
- 1,596 Sq Ft
14183 New York 90

Locke, NY
- 11% Below List
- 34 Days On Market
- $154/SF
Sean Mack Hartnett Realty Solutions

$138,000

Sold Oct 3, 2025
- 2 Beds
- 1 Bath
- 1,006 Sq Ft
60 Wheeler Ave

Cortland, NY
- 5% Below List
- 14 Days On Market
- $137/SF
- Current Est. Value $167K
Sean Mack Hartnett Realty Solutions

$695,000

Sold Sep 25, 2025
- 4 Beds
- 4 Baths
- 3,321 Sq Ft
1149 Davinci Dr

Cortland, NY
- 13 Days On Market
- $209/SF
- Current Est. Value $783K
Sean Mack Hartnett Realty Solutions

$41,500

Sold Jun 23, 2025
- Land
- 0.56 Acres Lot
1833 Preble Rd

Unit 1831

Preble, NY
- 17% Below List
- 186 Days On Market
- Current Est. Value $149K
Sean Mack Hartnett Realty Solutions

$150,000

Sold May 21, 2025
- 4 Beds
- 2 Baths
- 2,090 Sq Ft
4 S Franklin St

Cortland, NY
- 24 Days On Market
- $72/SF
- Current Est. Value $165K
Sean Mack Hartnett Realty Solutions

$147,500

Sold May 8, 2024
- 3 Beds
- 1 Bath
- 1,154 Sq Ft
70 Floral Ave

Cortland, NY
- 16% Below List
- 184 Days On Market
- $128/SF
- Current Est. Value $183K
Sean Mack Hartnett Realty Solutions

Agent License: New York 30MA0531346

Sean Mack

(607) 605-6659

Hartnett Realty Solutions

(607) 605-6659

Homes for Sale by City

Sean Mack

About Sean

Transaction History

Seller Deals

Buyer Deals

Production Over Time

1 Year View by Quarter

Seller Deals

Buyer Deals

Seller Deals

Buyer Deals

Production Over Time

5 Year View

Neighborhoods Sean is Experienced In

Sean's Listings and Deals

Sean's Active Listings

Recently Sold