959

Recently Sold Kilbourne, OH Homes

Section Image Section Image
  • 279 Richards Cir, Delaware, OH 43015
    279 Richards Cir, Delaware, OH 43015
    279 Richards Cir, Delaware, OH 43015
    /60

    $462,500 Sold Sep 04, 2025

    279 Richards Cir, Delaware, OH 43015

    • 2,681 Sq Ft
    • Built 1998

    Last Sold Summary

    • 7% Below List Price
    • $173/SF
    • 18 Days On Market

    Current Estimated Value $466,193

    Last Listing Agent Linda Rano-Jonard RE/MAX Affiliates, Inc.

    279 Richards Cir, Delaware, OH 43015
  • 147 Curly Smart Cir, Delaware, OH 43015
    147 Curly Smart Cir, Delaware, OH 43015
    147 Curly Smart Cir, Delaware, OH 43015
    /35

    $330,000 Sold Sep 05, 2025

    147 Curly Smart Cir, Delaware, OH 43015

    • 3 Beds
    • 2.5 Baths
    • 1,959 Sq Ft
    • Built 1989

    Last Sold Summary

    • 6% Below List Price
    • $168/SF
    • 20 Days On Market

    Current Estimated Value $348,716

    Last Listing Agent Heather Kamann Howard Hanna Real Estate Services

    147 Curly Smart Cir, Delaware, OH 43015
  • 1702 Longhill Dr, Delaware, OH 43015
    1702 Longhill Dr, Delaware, OH 43015
    1702 Longhill Dr, Delaware, OH 43015
    /16

    $514,080 Sold Apr 29, 2025

    1702 Longhill Dr, Delaware, OH 43015

    • 4 Beds
    • 2.5 Baths
    • 2,336 Sq Ft
    • Built 2025

    Last Sold Summary

    • 3% Below List Price
    • $220/SF
    • 72 Days On Market

    Last Listing Agent Dan Tartabini New Advantage, LTD

    1702 Longhill Dr, Delaware, OH 43015
  • 186 Lexington Blvd, Delaware, OH 43015
    186 Lexington Blvd, Delaware, OH 43015
    186 Lexington Blvd, Delaware, OH 43015
    /35

    $270,000 Sold Jul 18, 2025

    186 Lexington Blvd, Delaware, OH 43015

    • 3 Beds
    • 2.5 Baths
    • 1,412 Sq Ft
    • Built 1994

    Last Sold Summary

    • 2% Below List Price
    • $191/SF
    • 20 Days On Market

    Current Estimated Value $271,036

    Last Listing Agent Kyle Shaw Keller Williams Consultants

    186 Lexington Blvd, Delaware, OH 43015
  • 28 Hammond St, Delaware, OH 43015
    28 Hammond St, Delaware, OH 43015
    28 Hammond St, Delaware, OH 43015
    /8

    $148,000 Sold Jan 07, 2026

    28 Hammond St, Delaware, OH 43015

    • 2 Beds
    • 1.5 Baths
    • 1,319 Sq Ft
    • Built 1901

    Last Sold Summary

    • 15% Below List Price
    • $112/SF
    • 46 Days On Market

    Last Listing Agent Robert Gratton Coldwell Banker Realty

    28 Hammond St, Delaware, OH 43015
  • 634 Penwell Dr, Delaware, OH 43015
    634 Penwell Dr, Delaware, OH 43015
    634 Penwell Dr, Delaware, OH 43015
    /30

    $405,801 Sold May 23, 2025

    634 Penwell Dr, Delaware, OH 43015

    • 4 Beds
    • 2.5 Baths
    • 1,510 Sq Ft
    • Built 2024

    Last Sold Summary

    • 3% Below List Price
    • $269/SF
    • 18 Days On Market

    Current Estimated Value $409,539

    Last Listing Agent Megan Dodderer Collective House Realty

    634 Penwell Dr, Delaware, OH 43015
  • 29 David St, Delaware, OH 43015
    29 David St, Delaware, OH 43015
    29 David St, Delaware, OH 43015
    /50

    $279,900 Sold Oct 24, 2025

    29 David St, Delaware, OH 43015

    • 5 Beds
    • 2.5 Baths
    • 2,034 Sq Ft
    • Built 1969

    Last Sold Summary

    • $138/SF

    Current Estimated Value $272,790

    Last Listing Agent Tatiana Grigorita Red 1 Realty

    29 David St, Delaware, OH 43015
  • 840 Sunny Vale Dr, Delaware, OH 43015
    840 Sunny Vale Dr, Delaware, OH 43015
    840 Sunny Vale Dr, Delaware, OH 43015
    /30

    $384,900 Sold Jun 25, 2025

    840 Sunny Vale Dr, Delaware, OH 43015

    • 4 Beds
    • 2.5 Baths
    • 1,510 Sq Ft
    • Built 2024

    Last Sold Summary

    • 1% Below List Price
    • $255/SF
    • 49 Days On Market

    Current Estimated Value $388,219

    Last Listing Agent Megan Dodderer Collective House Realty

    840 Sunny Vale Dr, Delaware, OH 43015
  • 291 Hawthorn Blvd, Delaware, OH 43015
    291 Hawthorn Blvd, Delaware, OH 43015
    291 Hawthorn Blvd, Delaware, OH 43015
    /66

    $553,000 Sold Aug 14, 2025

    291 Hawthorn Blvd, Delaware, OH 43015

    • 4 Beds
    • 3.5 Baths
    • 3,500 Sq Ft
    • Built 1998

    Last Sold Summary

    • 1% Above List Price
    • $158/SF
    • 36 Days On Market

    Current Estimated Value $553,171

    Last Listing Agent Kathy Chiero Coldwell Banker Realty

    291 Hawthorn Blvd, Delaware, OH 43015
  • 41 Montrose Ave, Delaware, OH 43015
    41 Montrose Ave, Delaware, OH 43015
    41 Montrose Ave, Delaware, OH 43015
    /57

    $399,000 Sold Jun 26, 2025

    41 Montrose Ave, Delaware, OH 43015

    • 6 Beds
    • 3 Baths
    • 2,508 Sq Ft
    • Built 1900

    Last Sold Summary

    • 5% Below List Price
    • $159/SF
    • 7 Days On Market

    Current Estimated Value $398,857

    Last Listing Agent Tim Meacham Meacham Real Estate Company

    41 Montrose Ave, Delaware, OH 43015
  • 169 E William St, Delaware, OH 43015
    169 E William St, Delaware, OH 43015
    169 E William St, Delaware, OH 43015
    /10

    $170,000 Sold Dec 12, 2025

    169 E William St, Delaware, OH 43015

    • 2 Beds
    • 1 Bath
    • 1,035 Sq Ft
    • Built 1901

    Last Sold Summary

    • 1% Above List Price
    • $164/SF
    • 2 Days On Market

    Last Listing Agent R.J. Sabatino T & R Properties, Inc.

    169 E William St, Delaware, OH 43015
  • 229 E William St, Delaware, OH 43015
    229 E William St, Delaware, OH 43015
    229 E William St, Delaware, OH 43015
    /26

    $225,000 Sold Nov 25, 2025

    229 E William St, Delaware, OH 43015

    • 3 Beds
    • 1 Bath
    • 1,425 Sq Ft
    • Built 1901

    Last Sold Summary

    • 2% Above List Price
    • $158/SF
    • 1 Day On Market

    Last Listing Agent Joseph Bielanski Keller Williams Capital Ptnrs

    229 E William St, Delaware, OH 43015
  • 239 S Franklin St, Delaware, OH 43015
    239 S Franklin St, Delaware, OH 43015
    239 S Franklin St, Delaware, OH 43015
    /70

    $300,000 Sold Aug 26, 2025

    239 S Franklin St, Delaware, OH 43015

    • 3 Beds
    • 2 Baths
    • 1,152 Sq Ft
    • Built 1892

    Last Sold Summary

    • 2% Below List Price
    • $260/SF
    • 4 Days On Market

    Current Estimated Value $295,211

    Last Listing Agent Michelle Groff RE/MAX Impact

    239 S Franklin St, Delaware, OH 43015
  • 236 S Franklin St, Delaware, OH 43015
    236 S Franklin St, Delaware, OH 43015
    236 S Franklin St, Delaware, OH 43015
    /35

    $150,000 Sold Aug 22, 2025

    236 S Franklin St, Delaware, OH 43015

    • 2 Beds
    • 1.5 Baths
    • 1,400 Sq Ft
    • Built 1901

    Last Sold Summary

    • $107/SF
    • 1 Day On Market

    Current Estimated Value $153,245

    Last Listing Agent Stephanie Cashman RE/MAX Allegiance

    236 S Franklin St, Delaware, OH 43015
  • 70 Welshire Ct Unit 11C, Delaware, OH 43015
    70 Welshire Ct Unit 11C, Delaware, OH 43015
    /2

    $290,000 Sold Mar 24, 2025

    70 Welshire Ct Unit 11C, Delaware, OH 43015

    • 2 Beds
    • 3 Baths
    • 1,248 Sq Ft
    • Built 1991

    Last Sold Summary

    • $232/SF

    Current Estimated Value $290,491

    Last Listing Agent NON MEMBER NON MEMBER OFFICE

    70 Welshire Ct Unit 11C, Delaware, OH 43015
  • 103 Kettering Bend, Delaware, OH 43015
    103 Kettering Bend, Delaware, OH 43015
    103 Kettering Bend, Delaware, OH 43015
    /26

    $339,000 Sold Oct 10, 2025

    103 Kettering Bend, Delaware, OH 43015

    • 3 Beds
    • 2.5 Baths
    • 1,710 Sq Ft
    • Built 1997

    Last Sold Summary

    • 6% Below List Price
    • $198/SF
    • 47 Days On Market

    Current Estimated Value $340,674

    Last Listing Agent Jane Bachert NextHome Experience

    103 Kettering Bend, Delaware, OH 43015
  • 1607 Marie Way, Delaware, OH 43015
    1607 Marie Way, Delaware, OH 43015
    1607 Marie Way, Delaware, OH 43015
    /32

    $519,180 Sold Apr 18, 2025

    1607 Marie Way, Delaware, OH 43015

    • 4 Beds
    • 2.5 Baths
    • 2,336 Sq Ft
    • Built 2025

    Last Sold Summary

    • 3% Below List Price
    • $222/SF
    • 148 Days On Market

    Last Listing Agent Dan Tartabini New Advantage, LTD

    1607 Marie Way, Delaware, OH 43015
  • 466 Penwell Dr Unit Lot 13905, Delaware, OH 43015
    466 Penwell Dr Unit Lot 13905, Delaware, OH 43015
    466 Penwell Dr Unit Lot 13905, Delaware, OH 43015
    /30

    $509,900 Sold Aug 18, 2025

    466 Penwell Dr Unit Lot 13905, Delaware, OH 43015

    • 4 Beds
    • 2.5 Baths
    • 3,020 Sq Ft
    • Built 2025

    Last Sold Summary

    • 1% Below List Price
    • $169/SF
    • 27 Days On Market

    Last Listing Agent Charlene Fairman The Realty Firm

    466 Penwell Dr Unit Lot 13905, Delaware, OH 43015
  • 417 Ironhorse Dr, Delaware, OH 43015
    417 Ironhorse Dr, Delaware, OH 43015
    417 Ironhorse Dr, Delaware, OH 43015
    /74

    $459,900 Sold Mar 17, 2025

    417 Ironhorse Dr, Delaware, OH 43015

    • 4 Beds
    • 2.5 Baths
    • 2,332 Sq Ft
    • Built 2004

    Last Sold Summary

    • $197/SF
    • 65 Days On Market

    Current Estimated Value $474,010

    Last Listing Agent Michael Ferrante Century 21 HomeStar

    417 Ironhorse Dr, Delaware, OH 43015
  • 66 Allenhurst Way, Delaware, OH 43015
    66 Allenhurst Way, Delaware, OH 43015
    66 Allenhurst Way, Delaware, OH 43015
    /22

    $330,375 Sold Jan 23, 2026

    66 Allenhurst Way, Delaware, OH 43015

    • 3 Beds
    • 4 Baths
    • 2,190 Sq Ft
    • Built 2026

    Move in Ready Sold Summary

    • $151/SF
    • 42 Days On Market

    Ryan Homes Addison Farms - Townhomes

    66 Allenhurst Way, Delaware, OH 43015
  • 347 Broad Furrows Ave, Delaware, OH 43015
    347 Broad Furrows Ave, Delaware, OH 43015
    347 Broad Furrows Ave, Delaware, OH 43015
    /9

    $634,990 Sold Aug 13, 2025

    347 Broad Furrows Ave, Delaware, OH 43015

    • 4 Beds
    • 2 Baths
    • 2,724 Sq Ft
    • Built 2025

    Move in Ready Sold Summary

    • $233/SF
    • 34 Days On Market

    Fischer Homes Stockdale Farms - Designer Collection

    347 Broad Furrows Ave, Delaware, OH 43015
  • 160 Hayfield Dr, Delaware, OH 43015
    160 Hayfield Dr, Delaware, OH 43015
    160 Hayfield Dr, Delaware, OH 43015
    /39

    $449,900 Sold Oct 03, 2025

    160 Hayfield Dr, Delaware, OH 43015

    • 3 Beds
    • 2.5 Baths
    • 2,140 Sq Ft
    • Built 2003

    Last Sold Summary

    • $210/SF
    • 12 Days On Market

    Current Estimated Value $447,728

    Last Listing Agent Carol Reeves RE/MAX Achievers

    160 Hayfield Dr, Delaware, OH 43015
  • 2165 Horseshoe Rd, Delaware, OH 43015
    2165 Horseshoe Rd, Delaware, OH 43015
    2165 Horseshoe Rd, Delaware, OH 43015
    /65

    $600,000 Sold May 02, 2025

    2165 Horseshoe Rd, Delaware, OH 43015

    • 3 Beds
    • 3 Baths
    • 1,807 Sq Ft
    • Built 2002

    Last Sold Summary

    • $332/SF
    • 2 Days On Market

    Current Estimated Value $517,412

    Last Listing Agent Heather Kamann Howard Hanna Real Estate Services

    2165 Horseshoe Rd, Delaware, OH 43015
  • 483 Penwell Dr Unit Lot 13914, Delaware, OH 43015
    483 Penwell Dr Unit Lot 13914, Delaware, OH 43015
    483 Penwell Dr Unit Lot 13914, Delaware, OH 43015
    /14

    $447,900 Sold Jun 30, 2025

    483 Penwell Dr Unit Lot 13914, Delaware, OH 43015

    • 3 Beds
    • 2.5 Baths
    • 2,126 Sq Ft
    • Built 2025

    Last Sold Summary

    • 2% Below List Price
    • $211/SF
    • 28 Days On Market

    Last Listing Agent Charlene Fairman The Realty Firm

    483 Penwell Dr Unit Lot 13914, Delaware, OH 43015
  • 184 Delaware Dr, Delaware, OH 43015
    184 Delaware Dr, Delaware, OH 43015
    /2

    $435,000 Sold Jul 03, 2025

    184 Delaware Dr, Delaware, OH 43015

    • 4 Beds
    • 2.5 Baths
    • 2,840 Sq Ft
    • Built 2021

    Last Sold Summary

    • $153/SF

    Current Estimated Value $438,709

    Last Listing Agent Cristina Romanelli Keller Williams Greater Cols

    184 Delaware Dr, Delaware, OH 43015
  • 168 Winding Valley Dr, Delaware, OH 43015
    168 Winding Valley Dr, Delaware, OH 43015
    168 Winding Valley Dr, Delaware, OH 43015
    /53

    $400,000 Sold Sep 30, 2025

    168 Winding Valley Dr, Delaware, OH 43015

    • 3 Beds
    • 2.5 Baths
    • 1,848 Sq Ft
    • Built 2010

    Last Sold Summary

    • 8% Below List Price
    • $216/SF
    • 47 Days On Market

    Last Listing Agent Yanhua Xue OwnerLand Realty, Inc.

    168 Winding Valley Dr, Delaware, OH 43015
  • 200 N Franklin St, Delaware, OH 43015
    200 N Franklin St, Delaware, OH 43015
    200 N Franklin St, Delaware, OH 43015
    /57

    $670,000 Sold Sep 30, 2025

    200 N Franklin St, Delaware, OH 43015

    • 4 Beds
    • 2.5 Baths
    • 2,800 Sq Ft
    • Built 1900

    Last Sold Summary

    • 4% Below List Price
    • $239/SF
    • 4 Days On Market

    Current Estimated Value $663,636

    Last Listing Agent Stephanie VanGundy Howard Hanna Real Estate Services

    200 N Franklin St, Delaware, OH 43015
  • 2549 Carrowmore Dr, Delaware, OH 43015
    2549 Carrowmore Dr, Delaware, OH 43015
    2549 Carrowmore Dr, Delaware, OH 43015
    /37

    $489,900 Sold Mar 14, 2025

    2549 Carrowmore Dr, Delaware, OH 43015

    • 4 Beds
    • 2.5 Baths
    • 2,053 Sq Ft
    • Built 2024

    Last Sold Summary

    • $239/SF
    • 144 Days On Market

    Current Estimated Value $514,246

    Last Listing Agent Alexander Hencheck HMS Real Estate

    2549 Carrowmore Dr, Delaware, OH 43015
  • 220 Bendelow Ct, Delaware, OH 43015
    220 Bendelow Ct, Delaware, OH 43015
    /2

    $279,000 Sold Aug 19, 2025

    220 Bendelow Ct, Delaware, OH 43015

    • 3 Beds
    • 1.5 Baths
    • 1,300 Sq Ft
    • Built 1996

    Last Sold Summary

    • $215/SF
    • 0 Days On Market

    Current Estimated Value $284,379

    Last Listing Agent NON MEMBER NON MEMBER OFFICE

    220 Bendelow Ct, Delaware, OH 43015
  • 111 Glengary Dr, Delaware, OH 43015
    111 Glengary Dr, Delaware, OH 43015
    111 Glengary Dr, Delaware, OH 43015
    /46

    $359,000 Sold Oct 23, 2025

    111 Glengary Dr, Delaware, OH 43015

    • 3 Beds
    • 2.5 Baths
    • 1,951 Sq Ft
    • Built 1999

    Last Sold Summary

    • $184/SF
    • 6 Days On Market

    Current Estimated Value $359,603

    Last Listing Agent Steve Smith Keller Williams Consultants

    111 Glengary Dr, Delaware, OH 43015
  • 284 Firestone Dr, Delaware, OH 43015
    284 Firestone Dr, Delaware, OH 43015
    284 Firestone Dr, Delaware, OH 43015
    /23

    $211,500 Sold Sep 05, 2025

    284 Firestone Dr, Delaware, OH 43015

    • 3 Beds
    • 2.5 Baths
    • 1,535 Sq Ft
    • Built 2000

    Last Sold Summary

    • 8% Above List Price
    • $138/SF
    • 1 Day On Market

    Current Estimated Value $222,234

    Last Listing Agent James Bevins RE/MAX Revealty

    284 Firestone Dr, Delaware, OH 43015
  • 2201 Dates St, Delaware, OH 43015
    2201 Dates St, Delaware, OH 43015
    2201 Dates St, Delaware, OH 43015
    /43

    $340,000 Sold Mar 03, 2025

    2201 Dates St, Delaware, OH 43015

    • 4 Beds
    • 2.5 Baths
    • 2,227 Sq Ft
    • Built 2001

    Last Sold Summary

    • 3% Below List Price
    • $153/SF
    • 30 Days On Market

    Current Estimated Value $355,625

    Last Listing Agent Sam Miller Re/Max Stars

    2201 Dates St, Delaware, OH 43015
  • 644 White Fawn Run, Delaware, OH 43015
    644 White Fawn Run, Delaware, OH 43015
    644 White Fawn Run, Delaware, OH 43015
    /54

    $519,060 Sold Jul 11, 2025

    644 White Fawn Run, Delaware, OH 43015

    • 4 Beds
    • 2.5 Baths
    • 2,532 Sq Ft
    • Built 2018

    Last Sold Summary

    • 1% Below List Price
    • $205/SF
    • 38 Days On Market

    Current Estimated Value $527,655

    Last Listing Agent Harshavardha Kuppili Key Realty

    644 White Fawn Run, Delaware, OH 43015
  • 86 Orchard Heights, Delaware, OH 43015
    86 Orchard Heights, Delaware, OH 43015
    86 Orchard Heights, Delaware, OH 43015
    /12

    $288,900 Sold Jul 03, 2025

    86 Orchard Heights, Delaware, OH 43015

    • 3 Beds
    • 1.5 Baths
    • 1,092 Sq Ft
    • Built 1961

    Last Sold Summary

    • $265/SF
    • 49 Days On Market

    Current Estimated Value $280,581

    Last Listing Agent Kelli Hatfield Beckett Realty Group

    86 Orchard Heights, Delaware, OH 43015
  • 2770 Piatt Crest Dr, Delaware, OH 43015
    2770 Piatt Crest Dr, Delaware, OH 43015
    2770 Piatt Crest Dr, Delaware, OH 43015
    /58

    $588,900 Sold Nov 19, 2025

    2770 Piatt Crest Dr, Delaware, OH 43015

    • 5 Beds
    • 3.5 Baths
    • 3,062 Sq Ft
    • Built 2025

    Move in Ready Sold Summary

    • $192/SF
    • 7 Days On Market

    D.R. Horton Piatt Preserve

    2770 Piatt Crest Dr, Delaware, OH 43015
  • 2646 Charlotte Way, Delaware, OH 43015
    2646 Charlotte Way, Delaware, OH 43015
    2646 Charlotte Way, Delaware, OH 43015
    /14

    $559,420 Sold Dec 23, 2025

    2646 Charlotte Way, Delaware, OH 43015

    • 3 Beds
    • 2.5 Baths
    • 2,482 Sq Ft
    • Built 2025

    Move in Ready Sold Summary

    • $225/SF
    • 6 Days On Market

    M/I Homes Berlin Farm - Smart Essentials Collection

    2646 Charlotte Way, Delaware, OH 43015
  • 78 Grandview Ave, Delaware, OH 43015
    78 Grandview Ave, Delaware, OH 43015
    78 Grandview Ave, Delaware, OH 43015
    /64

    $330,000 Sold Oct 07, 2025

    78 Grandview Ave, Delaware, OH 43015

    • 4 Beds
    • 2.5 Baths
    • 2,826 Sq Ft
    • Built 1963

    Last Sold Summary

    • 2% Above List Price
    • $117/SF
    • 2 Days On Market

    Current Estimated Value $330,116

    Last Listing Agent Chris Massey Generations Realty

    78 Grandview Ave, Delaware, OH 43015
  • 831 Summerville Dr, Delaware, OH 43015
    831 Summerville Dr, Delaware, OH 43015
    831 Summerville Dr, Delaware, OH 43015
    /31

    $289,900 Sold Jun 27, 2025

    831 Summerville Dr, Delaware, OH 43015

    • 3 Beds
    • 2.5 Baths
    • 1,682 Sq Ft
    • Built 2005

    Last Sold Summary

    • 2% Below List Price
    • $172/SF
    • 44 Days On Market

    Current Estimated Value $295,022

    Last Listing Agent Christopher Moore Keller Williams Capital Ptnrs

    831 Summerville Dr, Delaware, OH 43015
  • 1628 Maple Heights Dr, Delaware, OH 43015
    1628 Maple Heights Dr, Delaware, OH 43015
    /2

    $590,751 Sold Oct 27, 2025

    1628 Maple Heights Dr, Delaware, OH 43015

    • 4 Beds
    • 2.5 Baths
    • 3,840 Sq Ft
    • Built 2025

    Last Sold Summary

    • $154/SF

    Current Estimated Value $608,015

    Last Listing Agent NON MEMBER NON MEMBER OFFICE

    1628 Maple Heights Dr, Delaware, OH 43015
  • 765 Heritage Blvd, Delaware, OH 43015
    765 Heritage Blvd, Delaware, OH 43015
    /2

    $514,594 Sold Jun 12, 2025

    765 Heritage Blvd, Delaware, OH 43015

    • 3 Beds
    • 3 Baths
    • 2,103 Sq Ft
    • Built 2025

    Last Sold Summary

    • $245/SF

    Last Listing Agent NON MEMBER NON MEMBER OFFICE

    765 Heritage Blvd, Delaware, OH 43015

Showing Results 601 - 640, Page 16 of 18

Ohio Delaware County Kilbourne

Recently Sold Real Estate & Homes in Kilbourne, OH

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