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 Pending $154,500 - co-listed by Sean Mack — Pending $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

Areas Sean is Experienced In

Cortland

18 Sales
Virgil

15 Sales
Cortlandville

9 Sales
Groton

2 Sales
Marathon

2 Sales
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

$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

Co-Listing Agent

$154,500

Pending
- 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

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 $777K
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

Frequently Asked Questions

Who is Sean Mack, and what is their real estate background?

How many homes has Sean Mack sold in Cortland, NY?

What is Sean Mack's track record representing buyers?

What is Sean Mack's track record as a listing agent?

What areas does Sean Mack serve?

How can I contact Sean Mack?

Sean Mack

(607) 605-6659

Hartnett Realty Solutions

(607) 605-6659

Nearby Homes

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

Areas Sean is Experienced In

Sean's Listings and Deals

Sean's Active Listings

Recently Sold

Frequently Asked Questions

Who is Sean Mack, and what is their real estate background?

How many homes has Sean Mack sold in Cortland, NY?

What is Sean Mack's track record representing buyers?

What is Sean Mack's track record as a listing agent?

What areas does Sean Mack serve?

How can I contact Sean Mack?