381

Recently Sold Franklin County NY Homes

Section Image
  • 4 Scott Dr, Malone, NY 12953
    4 Scott Dr, Malone, NY 12953
    4 Scott Dr, Malone, NY 12953
    /31

    $161,000 Sold Mar 23, 2026

    4 Scott Dr, Malone, NY 12953

    • 3 Beds
    • 1 Bath
    • 1,232 Sq Ft
    • Built 1957

    Last Sold Summary

    • 8% Below List Price
    • $131/SF

    Current Estimated Value $174,007

    Last Listing Agent Alanna Mills Home Roots Realty

    4 Scott Dr, Malone, NY 12953
  • 26 Elm St, Malone, NY 12953
    26 Elm St, Malone, NY 12953
    26 Elm St, Malone, NY 12953
    /30

    $215,000 Sold Jun 23, 2025

    26 Elm St, Malone, NY 12953

    • 3 Beds
    • 4 Baths
    • 2,854 Sq Ft
    • Built 1842

    Last Sold Summary

    • 9% Below List Price
    • $75/SF

    Current Estimated Value $215,298

    Last Listing Agent Brick Marshall Marshall Realty & Associates

    26 Elm St, Malone, NY 12953
  • 47 Washington St, Tupper Lake, NY 12986
    47 Washington St, Tupper Lake, NY 12986
    47 Washington St, Tupper Lake, NY 12986
    /61

    $170,000 Sold Jul 18, 2025

    47 Washington St, Tupper Lake, NY 12986

    • 3 Beds
    • 1.5 Baths
    • 1,228 Sq Ft
    • Built 1925

    Last Sold Summary

    • 15% Below List Price
    • $138/SF

    Current Estimated Value $171,901

    Last Listing Agent Lisa Gillis Merrill L. Thomas - Gillis Team

    47 Washington St, Tupper Lake, NY 12986
  • 5 Cassell Ln, Tupper Lake, NY 12986
    5 Cassell Ln, Tupper Lake, NY 12986
    5 Cassell Ln, Tupper Lake, NY 12986
    /76

    $236,500 Sold Jun 16, 2025

    5 Cassell Ln, Tupper Lake, NY 12986

    • 4 Beds
    • 2 Baths
    • 1,207 Sq Ft
    • Built 1928

    Last Sold Summary

    • 5% Above List Price
    • $196/SF
    • 0 Days On Market

    Current Estimated Value $236,018

    Last Listing Agent Michelle Blair Merrill L. Thomas - Gillis Team

    5 Cassell Ln, Tupper Lake, NY 12986
  • 138 Kiwassa Rd, Saranac Lake, NY 12983
    138 Kiwassa Rd, Saranac Lake, NY 12983
    138 Kiwassa Rd, Saranac Lake, NY 12983
    /30

    $555,750 Sold Sep 12, 2025

    138 Kiwassa Rd, Saranac Lake, NY 12983

    • 3 Beds
    • 2 Baths
    • 1,275 Sq Ft
    • Built 1920

    Last Sold Summary

    • 5% Below List Price
    • $436/SF
    • 0 Days On Market

    Current Estimated Value $582,997

    Last Listing Agent Kathryn (Katie) Stiles Adirondack Stiles Real Estate Company

    138 Kiwassa Rd, Saranac Lake, NY 12983
  • . Lewis Rd, Chateaugay, NY 12920
    . Lewis Rd, Chateaugay, NY 12920
    . Lewis Rd, Chateaugay, NY 12920
    /14

    $17,500 Sold Mar 17, 2026

    . Lewis Rd, Chateaugay, NY 12920

    • Land
    • 5.47 Acres
    • $3,199 per Acre

    Last Sold Summary

    • 10% Below List Price

    Last Listing Agent Matt Backus Backus Real Estate, Inc.

    . Lewis Rd, Chateaugay, NY 12920
  • 68 Riverside Dr, Saranac Lake, NY 12983
    68 Riverside Dr, Saranac Lake, NY 12983
    68 Riverside Dr, Saranac Lake, NY 12983
    /10

    $375,000 Sold Apr 24, 2025

    68 Riverside Dr, Saranac Lake, NY 12983

    • 4 Beds
    • 1.5 Baths
    • 1,822 Sq Ft
    • Built 1925

    Last Sold Summary

    • 39% Above List Price
    • $206/SF
    • 0 Days On Market

    Current Estimated Value $420,382

    Last Listing Agent Bob Miller Bob Miller Real Estate

    68 Riverside Dr, Saranac Lake, NY 12983
  • 90 Gran View Dr, Malone, NY 12953
    90 Gran View Dr, Malone, NY 12953
    90 Gran View Dr, Malone, NY 12953
    /27

    $270,000 Sold Jul 15, 2025

    90 Gran View Dr, Malone, NY 12953

    • 4 Beds
    • 1.5 Baths
    • 2,208 Sq Ft
    • Built 1957

    Last Sold Summary

    • 4% Below List Price
    • $122/SF
    • 0 Days On Market

    Current Estimated Value $294,349

    Last Listing Agent Craig Garrow Marshall Realty & Associates

    90 Gran View Dr, Malone, NY 12953
  • 1336 State Route 11b, Dickinson Center, NY 12930
    1336 State Route 11b, Dickinson Center, NY 12930
    1336 State Route 11b, Dickinson Center, NY 12930
    /21

    $94,500 Sold Sep 30, 2025

    1336 State Route 11b, Dickinson Center, NY 12930

    • 4 Beds
    • 1.5 Baths
    • 1,700 Sq Ft
    • Built 1900

    Last Sold Summary

    • 29% Below List Price
    • $56/SF
    • 0 Days On Market

    Current Estimated Value $112,172

    Last Listing Agent Virginia McLaughlin Red Door Realty & Associates

    1336 State Route 11b, Dickinson Center, NY 12930
  • 24 Hemlock Ledge Rd Unit Lot 6, Tupper Lake, NY 12986
    24 Hemlock Ledge Rd Unit Lot 6, Tupper Lake, NY 12986
    24 Hemlock Ledge Rd Unit Lot 6, Tupper Lake, NY 12986
    /75

    $1,100,000 Sold Jan 29, 2026

    24 Hemlock Ledge Rd Unit Lot 6, Tupper Lake, NY 12986

    • 6 Beds
    • 3.5 Baths
    • 2,000 Sq Ft
    • Built 1898

    Last Sold Summary

    • 37% Below List Price
    • $550/SF
    • 0 Days On Market

    Last Listing Agent Robert Gillis Merrill L. Thomas - Gillis Team

    24 Hemlock Ledge Rd Unit Lot 6, Tupper Lake, NY 12986
  • 171 Dyke Rd, Malone, NY 12953
    171 Dyke Rd, Malone, NY 12953
    171 Dyke Rd, Malone, NY 12953
    /12

    $67,000 Sold Jun 09, 2025

    171 Dyke Rd, Malone, NY 12953

    • 3 Beds
    • 2 Baths
    • 980 Sq Ft
    • Built 1996

    Last Sold Summary

    • 4% Below List Price
    • $68/SF
    • 0 Days On Market

    Last Listing Agent Tammy Keating North Country Realty

    171 Dyke Rd, Malone, NY 12953
  • 1095 Oregon Plains Rd, Onchiota, NY 12989
    1095 Oregon Plains Rd, Onchiota, NY 12989
    1095 Oregon Plains Rd, Onchiota, NY 12989
    /41

    $99,000 Sold Nov 15, 2025

    1095 Oregon Plains Rd, Onchiota, NY 12989

    • 4 Beds
    • 1 Bath
    • 844 Sq Ft
    • Built 1930

    Last Sold Summary

    • 1% Below List Price
    • $117/SF
    • 20 Days On Market

    Current Estimated Value $102,386

    Last Listing Agent Amjad Mughal M J J Realty

    1095 Oregon Plains Rd, Onchiota, NY 12989
  • Lot 1 Tansy Ln, Gabriels, NY 12939
    Lot 1 Tansy Ln, Gabriels, NY 12939
    Lot 1 Tansy Ln, Gabriels, NY 12939
    /23

    $65,000 Sold Oct 17, 2025

    Lot 1 Tansy Ln, Gabriels, NY 12939

    • Land
    • 1.97 Acres
    • $32,995 per Acre

    Last Sold Summary

    • 7% Below List Price

    Last Listing Agent Jonathan Gorgas Merrill L. Thomas, Inc.

    Lot 1 Tansy Ln, Gabriels, NY 12939
  • 1152 County Route 25, Whippleville, NY 12995
    1152 County Route 25, Whippleville, NY 12995
    1152 County Route 25, Whippleville, NY 12995
    /49

    $82,300 Sold Dec 16, 2025

    1152 County Route 25, Whippleville, NY 12995

    • 3 Beds
    • 1 Bath
    • 2,790 Sq Ft
    • Built 1900

    Last Sold Summary

    • 4% Above List Price
    • $29/SF
    • 0 Days On Market

    Current Estimated Value $146,986

    Last Listing Agent Douglas Clark North Country Realty

    1152 County Route 25, Whippleville, NY 12995
  • 39 Loon Lake Terrace, Loon Lake, NY 12989
    39 Loon Lake Terrace, Loon Lake, NY 12989
    39 Loon Lake Terrace, Loon Lake, NY 12989
    /14

    $259,000 Sold Feb 17, 2026

    39 Loon Lake Terrace, Loon Lake, NY 12989

    • 3 Beds
    • 2 Baths
    • 1,125 Sq Ft
    • Built 1898

    Last Sold Summary

    • 13% Below List Price
    • $230/SF

    Current Estimated Value $297,520

    Last Listing Agent Lisa McKenna Engel & Volkers Lake Placid Real Estate

    39 Loon Lake Terrace, Loon Lake, NY 12989
  • 50 Bowen Rd, North Bangor, NY 12966
    50 Bowen Rd, North Bangor, NY 12966
    50 Bowen Rd, North Bangor, NY 12966
    /28

    $295,000 Sold Apr 21, 2025

    50 Bowen Rd, North Bangor, NY 12966

    • 3 Beds
    • 3 Baths
    • 1,833 Sq Ft
    • Built 2008

    Last Sold Summary

    • 91% Below List Price
    • $161/SF
    • 0 Days On Market

    Current Estimated Value $326,292

    Last Listing Agent Douglas Clark North Country Realty

    50 Bowen Rd, North Bangor, NY 12966
  • 365 County Route 24, Malone, NY 12953
    365 County Route 24, Malone, NY 12953
    365 County Route 24, Malone, NY 12953
    /27

    $126,000 Sold Aug 18, 2025

    365 County Route 24, Malone, NY 12953

    • 2 Beds
    • 1 Bath
    • 1,560 Sq Ft
    • Built 1970

    Last Sold Summary

    • 9% Above List Price
    • $81/SF
    • 0 Days On Market

    Current Estimated Value $145,002

    Last Listing Agent Leah Hayes Coldwell Banker Whitbeck Assoc. Malone

    365 County Route 24, Malone, NY 12953
  • 37 1st St, Malone, NY 12953
    37 1st St, Malone, NY 12953
    37 1st St, Malone, NY 12953
    /24

    $175,000 Sold May 28, 2025

    37 1st St, Malone, NY 12953

    • 3 Beds
    • 2 Baths
    • 1,847 Sq Ft
    • Built 1900

    Last Sold Summary

    • 2% Below List Price
    • $95/SF

    Current Estimated Value $214,321

    Last Listing Agent Ed Legacy North Country Realty

    37 1st St, Malone, NY 12953
  • 86 Tamarack Dr, Malone, NY 12953
    86 Tamarack Dr, Malone, NY 12953
    /2

    $95,000 Sold Apr 25, 2025

    86 Tamarack Dr, Malone, NY 12953

    • 2 Beds
    • 2 Baths
    • 1,120 Sq Ft
    • Built 2003

    Last Sold Summary

    • $85/SF
    • 0 Days On Market

    Last Listing Agent Debbie Hutchins Coldwell Banker Whitbeck Assoc. Malone

    86 Tamarack Dr, Malone, NY 12953
  • Lot 16 Daigneau Trail, Franklin, NY 12989
    Lot 16 Daigneau Trail, Franklin, NY 12989
    /2

    $40,000 Sold Aug 15, 2025

    Lot 16 Daigneau Trail, Franklin, NY 12989

    • Land
    • 9.5 Acres
    • $4,211 per Acre

    Last Sold Summary

    Last Listing Agent Sanford C. Hayes, III Sandy Hayes Realty

    Lot 16 Daigneau Trail, Franklin, NY 12989
  • 97 Chandler Rd, Brushton, NY 12916
    97 Chandler Rd, Brushton, NY 12916
    97 Chandler Rd, Brushton, NY 12916
    /33

    $181,500 Sold May 27, 2025

    97 Chandler Rd, Brushton, NY 12916

    • 2 Beds
    • 1.5 Baths
    • 1,177 Sq Ft
    • Built 1900

    Last Sold Summary

    • 2% Below List Price
    • $154/SF
    • 0 Days On Market

    Current Estimated Value $205,195

    Last Listing Agent Alanna Mills Home Roots Realty

    97 Chandler Rd, Brushton, NY 12916
  • 0 Best Rd, Moira, NY 12957
    0 Best Rd, Moira, NY 12957
    0 Best Rd, Moira, NY 12957
    /3

    $265,000 Sold Apr 09, 2025

    0 Best Rd, Moira, NY 12957

    • Land
    • 279 Acres
    • $950 per Acre

    Last Sold Summary

    • 12% Below List Price
    • 0 Days On Market

    Last Listing Agent Melinda St. Hilaire Home Roots Realty

    0 Best Rd, Moira, NY 12957
  • 4 Patnode St, Malone, NY 12953
    4 Patnode St, Malone, NY 12953
    4 Patnode St, Malone, NY 12953
    /14

    $20,000 Sold Nov 21, 2025

    4 Patnode St, Malone, NY 12953

    • 2 Beds
    • 1 Bath
    • 672 Sq Ft
    • Built 1938

    Last Sold Summary

    • 64% Below List Price
    • $30/SF

    Current Estimated Value $51,667

    Last Listing Agent Virginia McLaughlin Red Door Realty & Associates

    4 Patnode St, Malone, NY 12953
  • 00 Palmer Rd, Waverly, NY 12980
    00 Palmer Rd, Waverly, NY 12980
    00 Palmer Rd, Waverly, NY 12980
    /5

    $32,000 Sold May 19, 2025

    00 Palmer Rd, Waverly, NY 12980

    • Land
    • 20 Acres
    • $1,600 per Acre

    Last Sold Summary

    Last Listing Agent Ed Legacy North Country Realty

    00 Palmer Rd, Waverly, NY 12980
  • 39 Oak Ln, Vermontville, NY 12989
    39 Oak Ln, Vermontville, NY 12989
    39 Oak Ln, Vermontville, NY 12989
    /33

    $300,000 Sold Feb 10, 2026

    39 Oak Ln, Vermontville, NY 12989

    • 2 Beds
    • 1 Bath
    • 960 Sq Ft
    • Built 2000

    Last Sold Summary

    • $312/SF
    • 0 Days On Market

    Current Estimated Value $280,956

    Last Listing Agent Lisa McKenna Engel & Volkers Lake Placid Real Estate

    39 Oak Ln, Vermontville, NY 12989
  • 145 Washington St, Tupper Lake, NY 12986
    145 Washington St, Tupper Lake, NY 12986
    145 Washington St, Tupper Lake, NY 12986
    /48

    $100,000 Sold Aug 13, 2025

    145 Washington St, Tupper Lake, NY 12986

    • 2 Beds
    • 1 Bath
    • 747 Sq Ft
    • Built 1910

    Last Sold Summary

    • 33% Above List Price
    • $134/SF
    • 0 Days On Market

    Current Estimated Value $110,646

    Last Listing Agent Michelle Blair Merrill L. Thomas - Gillis Team

    145 Washington St, Tupper Lake, NY 12986
  • 3 Waterdam Dr, Malone, NY 12953
    3 Waterdam Dr, Malone, NY 12953
    3 Waterdam Dr, Malone, NY 12953
    /5

    $22,000 Sold Aug 06, 2025

    3 Waterdam Dr, Malone, NY 12953

    • Land
    • 0.28 Acre
    • $78,571 per Acre

    Last Sold Summary

    • 21% Below List Price
    • 0 Days On Market

    Last Listing Agent Debbie Hutchins Coldwell Banker Whitbeck Assoc. Malone

    3 Waterdam Dr, Malone, NY 12953
  • 9 Coveytown Rd, Constable, NY 12926
    9 Coveytown Rd, Constable, NY 12926
    9 Coveytown Rd, Constable, NY 12926
    /21

    $138,020 Sold Nov 20, 2025

    9 Coveytown Rd, Constable, NY 12926

    • 3 Beds
    • 1 Bath
    • 1,096 Sq Ft
    • Built 1955

    Last Sold Summary

    • 11% Below List Price
    • $126/SF
    • 0 Days On Market

    Current Estimated Value $147,796

    Last Listing Agent Joanna Brown Northern Adirondack Realty

    9 Coveytown Rd, Constable, NY 12926
  • 22 Gerald Abbott Rd, Franklin, NY 12989
    22 Gerald Abbott Rd, Franklin, NY 12989
    22 Gerald Abbott Rd, Franklin, NY 12989
    /12

    $53,000 Sold May 14, 2025

    22 Gerald Abbott Rd, Franklin, NY 12989

    • Land
    • 5.67 Acres
    • $9,347 per Acre

    Last Sold Summary

    • 11% Below List Price
    • 0 Days On Market

    Last Listing Agent Jonathan Gorgas Merrill L. Thomas, Inc.

    22 Gerald Abbott Rd, Franklin, NY 12989
  • 15 Jones St, Malone, NY 12953
    15 Jones St, Malone, NY 12953
    15 Jones St, Malone, NY 12953
    /16

    $165,000 Sold Oct 09, 2025

    15 Jones St, Malone, NY 12953

    • 3 Beds
    • 1 Bath
    • 1,063 Sq Ft
    • Built 1880

    Last Sold Summary

    • 1% Below List Price
    • $155/SF
    • 0 Days On Market

    Current Estimated Value $172,692

    Last Listing Agent Justin Brown Let's Move Realty, LLC

    15 Jones St, Malone, NY 12953
  • 55 Saint Regis Carry Rd, Paul Smiths, NY 12970
    55 Saint Regis Carry Rd, Paul Smiths, NY 12970
    55 Saint Regis Carry Rd, Paul Smiths, NY 12970
    /55

    $2,200,000 Sold Sep 12, 2025

    55 Saint Regis Carry Rd, Paul Smiths, NY 12970

    • 7 Beds
    • 6.5 Baths
    • 3,073 Sq Ft
    • Built 1907

    Last Sold Summary

    • $716/SF
    • 0 Days On Market

    Last Listing Agent Caroline Rupp Merrill L. Thomas, Inc.

    55 Saint Regis Carry Rd, Paul Smiths, NY 12970
  • 12/13 Mt Pisgah Ave, Saranac Lake, NY 12983
    12/13 Mt Pisgah Ave, Saranac Lake, NY 12983
    12/13 Mt Pisgah Ave, Saranac Lake, NY 12983
    /13

    $32,000 Sold Oct 28, 2025

    12/13 Mt Pisgah Ave, Saranac Lake, NY 12983

    • Land
    • 2.32 Acres
    • $13,793 per Acre

    Last Sold Summary

    • 18% Below List Price
    • 0 Days On Market

    Last Listing Agent Kathleen Fischer Adirondack Premier Properties Berkshire Hathaway HomeService

    12/13 Mt Pisgah Ave, Saranac Lake, NY 12983
  • 92 Bloomingdale Ave, Saranac Lake, NY 12983
    92 Bloomingdale Ave, Saranac Lake, NY 12983
    92 Bloomingdale Ave, Saranac Lake, NY 12983
    /12

    $255,000 Sold May 19, 2025

    92 Bloomingdale Ave, Saranac Lake, NY 12983

    • 2,229 Sq Ft
    • Built 1890

    Last Sold Summary

    • 7% Below List Price
    • $114/SF
    • 0 Days On Market

    Current Estimated Value $280,571

    Last Listing Agent Lisa McKenna Engel & Volkers Lake Placid Real Estate

    92 Bloomingdale Ave, Saranac Lake, NY 12983
  • 14 South St, Malone, NY 12953
    14 South St, Malone, NY 12953
    14 South St, Malone, NY 12953
    /23

    $91,000 Sold Dec 17, 2025

    14 South St, Malone, NY 12953

    • 3 Beds
    • 1 Bath
    • 1,133 Sq Ft
    • Built 1923

    Last Sold Summary

    • 12% Below List Price
    • $80/SF
    • 0 Days On Market

    Current Estimated Value $96,105

    Last Listing Agent Douglas Clark North Country Realty

    14 South St, Malone, NY 12953
  • 5082 New York 30, Saranac Lake, NY 12983
    5082 New York 30, Saranac Lake, NY 12983
    5082 New York 30, Saranac Lake, NY 12983
    /26

    $1,175,000 Sold Feb 05, 2026

    5082 New York 30, Saranac Lake, NY 12983

    • 3 Beds
    • 1.5 Baths
    • 1,900 Sq Ft
    • Built 1980

    Last Sold Summary

    • 29% Below List Price
    • $618/SF

    Last Listing Agent Kathryn (Katie) Stiles Adirondack Stiles Real Estate Company

    5082 New York 30, Saranac Lake, NY 12983
  • 231 Muzzy Rd, Vermontville, NY 12989
    231 Muzzy Rd, Vermontville, NY 12989
    231 Muzzy Rd, Vermontville, NY 12989
    /13

    $35,000 Sold Jan 31, 2026

    231 Muzzy Rd, Vermontville, NY 12989

    • 3 Beds
    • 1 Bath
    • 540 Sq Ft
    • Built 2001

    Last Sold Summary

    • 59% Below List Price
    • $65/SF

    Last Listing Agent Matthew Szeliga Mountain Run Realty

    231 Muzzy Rd, Vermontville, NY 12989
  • 52 Lake St, Saranac Lake, NY 12983
    52 Lake St, Saranac Lake, NY 12983
    52 Lake St, Saranac Lake, NY 12983
    /46

    $405,000 Sold Nov 19, 2025

    52 Lake St, Saranac Lake, NY 12983

    • 3 Beds
    • 2 Baths
    • 1,363 Sq Ft
    • Built 2025

    Last Sold Summary

    • 2% Above List Price
    • $297/SF
    • 0 Days On Market

    Current Estimated Value $428,173

    Last Listing Agent Kristina Clifford Say Real Estate

    52 Lake St, Saranac Lake, NY 12983
  • 0 Trout River Rd, Burke, NY 12917
    0 Trout River Rd, Burke, NY 12917
    /2

    $20,000 Sold Nov 11, 2025

    0 Trout River Rd, Burke, NY 12917

    • Land
    • 21.1 Acres
    • $948 per Acre

    Last Sold Summary

    • 52% Below List Price

    Last Listing Agent Thomas MacDonald Langlois-Yando Realty

    0 Trout River Rd, Burke, NY 12917
  • 163 Vosburgh Rd, Rainbow Lake, NY 12976
    163 Vosburgh Rd, Rainbow Lake, NY 12976
    163 Vosburgh Rd, Rainbow Lake, NY 12976
    /48

    $819,935 Sold Oct 03, 2025

    163 Vosburgh Rd, Rainbow Lake, NY 12976

    • 3 Beds
    • 2 Baths
    • 1,720 Sq Ft
    • Built 1980

    Last Sold Summary

    • 8% Below List Price
    • $477/SF

    Current Estimated Value $846,823

    Last Listing Agent Kelsey Cassidy Merrill L. Thomas, Inc.

    163 Vosburgh Rd, Rainbow Lake, NY 12976
  • 17 Stacy Rd, Malone, NY 12953
    17 Stacy Rd, Malone, NY 12953
    17 Stacy Rd, Malone, NY 12953
    /56

    $316,000 Sold Jan 22, 2026

    17 Stacy Rd, Malone, NY 12953

    • 3 Beds
    • 2 Baths
    • 2,670 Sq Ft
    • Built 1978

    Last Sold Summary

    • 14% Below List Price
    • $118/SF
    • 0 Days On Market

    Current Estimated Value $327,591

    Last Listing Agent Douglas Clark North Country Realty

    17 Stacy Rd, Malone, NY 12953

Showing Results 81 - 120, Page 3 of 10

New York Franklin County

Recently Sold Real Estate & Homes in Franklin County, NY

How to Buy a Home How to Finance a Home How to Sell a Home

Disclaimer: Certain information contained herein is derived from information provided by parties other than Homes.com. All information provided is deemed reliable, but is not guaranteed to be accurate and should be independently verified.

Homes.com Licensing Information

§ 442-H New York Standard Operating Procedures

New York Fair Housing Notice

TREC: Information about brokerage services, Consumer protection notice

California DRE #01937601

Contact Homes.com Brokerage

Copyright © 2026 CoStar Group