80

Recently Sold Quarryville, PA Homes

Section Image
  • 0 Little Britain Rd N Unit PALA2068252, Quarryville, PA 17566
    0 Little Britain Rd N Unit PALA2068252, Quarryville, PA 17566
    /2

    $275,000 Sold Sep 11, 2025

    0 Little Britain Rd N Unit PALA2068252, Quarryville, PA 17566

    • Land
    • 5.16 Acres
    • $53,295 per Acre

    Last Sold Summary

    • 85 Days On Market

    Last Listing Agent Thomas Kreider Berkshire Hathaway HomeServices Homesale Realty

    0 Little Britain Rd N Unit PALA2068252, Quarryville, PA 17566
  • 406 S Church St, Quarryville, PA 17566
    406 S Church St, Quarryville, PA 17566
    406 S Church St, Quarryville, PA 17566
    /24

    $350,000 Sold Jan 09, 2026

    406 S Church St, Quarryville, PA 17566

    • 3 Beds
    • 1.5 Baths
    • 1,294 Sq Ft
    • Built 1959

    Last Sold Summary

    • 8% Above List Price
    • $270/SF
    • 6 Days On Market

    Current Estimated Value $330,298

    Last Listing Agent Randal Kline Kingsway Realty - Ephrata

    406 S Church St, Quarryville, PA 17566
  • 440 Scotland Rd, Quarryville, PA 17566
    440 Scotland Rd, Quarryville, PA 17566
    440 Scotland Rd, Quarryville, PA 17566
    /35

    $365,000 Sold Nov 07, 2025

    440 Scotland Rd, Quarryville, PA 17566

    • 3 Beds
    • 2 Baths
    • 1,196 Sq Ft
    • Built 1972

    Last Sold Summary

    • $305/SF
    • 2 Days On Market

    Current Estimated Value $356,100

    Last Listing Agent Jon Gordon Manor West Realty

    440 Scotland Rd, Quarryville, PA 17566
  • 229 Circle Dr, Quarryville, PA 17566
    229 Circle Dr, Quarryville, PA 17566
    /2

    $290,900 Sold Feb 18, 2026

    229 Circle Dr, Quarryville, PA 17566

    • 3 Beds
    • 1 Bath
    • 1,161 Sq Ft
    • Built 1967

    Last Sold Summary

    • 8% Above List Price
    • $251/SF
    • 4 Days On Market

    Current Estimated Value $277,249

    Last Listing Agent Erin Stewart Life Changes Realty Group

    229 Circle Dr, Quarryville, PA 17566
  • 46 Rineer Dr, Quarryville, PA 17566
    46 Rineer Dr, Quarryville, PA 17566
    46 Rineer Dr, Quarryville, PA 17566
    /37

    $284,000 Sold Nov 12, 2025

    46 Rineer Dr, Quarryville, PA 17566

    • 3 Beds
    • 2 Baths
    • 1,180 Sq Ft
    • Built 1985

    Last Sold Summary

    • $241/SF
    • 54 Days On Market

    Last Listing Agent John Christman Well Done Realty

    46 Rineer Dr, Quarryville, PA 17566
  • 1208 May Post Office Rd, Quarryville, PA 17566
    1208 May Post Office Rd, Quarryville, PA 17566
    1208 May Post Office Rd, Quarryville, PA 17566
    /33

    $315,000 Sold Jul 16, 2025

    1208 May Post Office Rd, Quarryville, PA 17566

    • 3 Beds
    • 1 Bath
    • 1,592 Sq Ft
    • Built 1979

    Last Sold Summary

    • $198/SF
    • 6 Days On Market

    Current Estimated Value $321,863

    Last Listing Agent Patrick Curran BHHS Fox & Roach-Kennett Sq

    1208 May Post Office Rd, Quarryville, PA 17566
  • 43 Evans Dr, Quarryville, PA 17566
    43 Evans Dr, Quarryville, PA 17566
    43 Evans Dr, Quarryville, PA 17566
    /32

    $276,000 Sold Jun 16, 2025

    43 Evans Dr, Quarryville, PA 17566

    • 3 Beds
    • 1.5 Baths
    • 1,836 Sq Ft
    • Built 2002

    Last Sold Summary

    • $150/SF
    • 5 Days On Market

    Current Estimated Value $284,283

    Last Listing Agent Andrew Welk CENTURY 21 Home Advisors

    43 Evans Dr, Quarryville, PA 17566
  • 124 Dawn St, Quarryville, PA 17566
    124 Dawn St, Quarryville, PA 17566
    124 Dawn St, Quarryville, PA 17566
    /27

    $70,641 Sold Apr 23, 2026

    124 Dawn St, Quarryville, PA 17566

    • 2 Beds
    • 2 Baths
    • 980 Sq Ft
    • Built 1993

    Last Sold Summary

    • 6% Below List Price
    • $72/SF
    • 48 Days On Market

    Last Listing Agent Jodi Baddick Realty ONE Group Unlimited

    124 Dawn St, Quarryville, PA 17566
  • 13 Ridgewood Rd Unit (DOUGLAS) LOT 7, Quarryville, PA 17566
    13 Ridgewood Rd Unit (DOUGLAS) LOT 7, Quarryville, PA 17566
    13 Ridgewood Rd Unit (DOUGLAS) LOT 7, Quarryville, PA 17566
    /3

    $728,620 Sold Mar 05, 2026

    13 Ridgewood Rd Unit (DOUGLAS) LOT 7, Quarryville, PA 17566

    • 3 Beds
    • 2 Baths
    • 1,701 Sq Ft
    • Built 2024

    Last Sold Summary

    • 47% Above List Price
    • $428/SF

    Last Listing Agent Dina Avvakumova Beiler-Campbell Realtors-Kennett Square

    13 Ridgewood Rd Unit (DOUGLAS) LOT 7, Quarryville, PA 17566
  • 259 W 5th St, Quarryville, PA 17566
    259 W 5th St, Quarryville, PA 17566
    259 W 5th St, Quarryville, PA 17566
    /31

    $395,000 Sold Jun 06, 2025

    259 W 5th St, Quarryville, PA 17566

    • 3 Beds
    • 2.5 Baths
    • 2,077 Sq Ft
    • Built 1988

    Last Sold Summary

    • $190/SF
    • 15 Days On Market

    Current Estimated Value $403,658

    Last Listing Agent Donna Giovingo Berkshire Hathaway HomeServices Homesale Realty

    259 W 5th St, Quarryville, PA 17566
  • 933 Buck Rd, Quarryville, PA 17566
    933 Buck Rd, Quarryville, PA 17566
    933 Buck Rd, Quarryville, PA 17566
    /8

    $311,100 Sold Jun 13, 2025

    933 Buck Rd, Quarryville, PA 17566

    • 3 Beds
    • 1.5 Baths
    • 1,224 Sq Ft
    • Built 1980

    Last Sold Summary

    • $254/SF
    • 5 Days On Market

    Current Estimated Value $320,329

    Last Listing Agent Jon Gordon Manor West Realty

    933 Buck Rd, Quarryville, PA 17566
  • 14 Carol Ln, Quarryville, PA 17566
    14 Carol Ln, Quarryville, PA 17566
    14 Carol Ln, Quarryville, PA 17566
    /50

    $380,000 Sold Mar 18, 2026

    14 Carol Ln, Quarryville, PA 17566

    • 3 Beds
    • 1.5 Baths
    • 1,370 Sq Ft
    • Built 1988

    Last Sold Summary

    • $277/SF
    • 4 Days On Market

    Current Estimated Value $376,291

    Last Listing Agent Chris Taylor Beiler-Campbell Realtors-Quarryville

    14 Carol Ln, Quarryville, PA 17566
  • 57 Hollow Rd, Quarryville, PA 17566
    57 Hollow Rd, Quarryville, PA 17566
    /2

    $450,000 Sold May 05, 2026

    57 Hollow Rd, Quarryville, PA 17566

    • Land
    • 10.7 Acres
    • $42,056 per Acre

    Last Sold Summary

    • 15% Above List Price
    • 3 Days On Market

    Last Listing Agent Jake Fisher Hostetter Realty

    57 Hollow Rd, Quarryville, PA 17566
  • 101 Marlton Ln, Quarryville, PA 17566
    101 Marlton Ln, Quarryville, PA 17566
    /2

    $430,000 Sold Mar 19, 2026

    101 Marlton Ln, Quarryville, PA 17566

    • 3 Beds
    • 2 Baths
    • 1,723 Sq Ft
    • Built 2008

    Last Sold Summary

    • 2% Above List Price
    • $250/SF
    • 3 Days On Market

    Current Estimated Value $423,835

    Last Listing Agent Tony D'Agostino RE/MAX Professional Realty

    101 Marlton Ln, Quarryville, PA 17566
  • 209 Stony Hill Rd, Quarryville, PA 17566
    209 Stony Hill Rd, Quarryville, PA 17566
    209 Stony Hill Rd, Quarryville, PA 17566
    /27

    $342,000 Sold Jul 31, 2025

    209 Stony Hill Rd, Quarryville, PA 17566

    • 3 Beds
    • 2 Baths
    • 1,344 Sq Ft
    • Built 1977

    Last Sold Summary

    • $254/SF
    • 4 Days On Market

    Current Estimated Value $344,391

    Last Listing Agent Adam Lewis Realty Professional Group LLC

    209 Stony Hill Rd, Quarryville, PA 17566
  • 280 Greystone Ln, Quarryville, PA 17566
    280 Greystone Ln, Quarryville, PA 17566
    280 Greystone Ln, Quarryville, PA 17566
    /37

    $425,000 Sold Sep 30, 2025

    280 Greystone Ln, Quarryville, PA 17566

    • 3 Beds
    • 2 Baths
    • 2,667 Sq Ft
    • Built 2011

    Last Sold Summary

    • $159/SF
    • 38 Days On Market

    Current Estimated Value $434,738

    Last Listing Agent Steve Herr H.K. Keller

    280 Greystone Ln, Quarryville, PA 17566
  • 150 Marlton Ln, Quarryville, PA 17566
    150 Marlton Ln, Quarryville, PA 17566
    150 Marlton Ln, Quarryville, PA 17566
    /27

    $385,000 Sold Dec 15, 2025

    150 Marlton Ln, Quarryville, PA 17566

    • 3 Beds
    • 2 Baths
    • 1,916 Sq Ft
    • Built 2004

    Last Sold Summary

    • $201/SF
    • 45 Days On Market

    Current Estimated Value $390,188

    Last Listing Agent Lethea Myers Berkshire Hathaway HomeServices Homesale Realty

    150 Marlton Ln, Quarryville, PA 17566
  • 788 Buck Rd, Quarryville, PA 17566
    788 Buck Rd, Quarryville, PA 17566
    788 Buck Rd, Quarryville, PA 17566
    /74

    $440,000 Sold May 30, 2025

    788 Buck Rd, Quarryville, PA 17566

    • 5 Beds
    • 1 Bath
    • 2,439 Sq Ft
    • Built 2004

    Last Sold Summary

    • $180/SF
    • 41 Days On Market

    Current Estimated Value $474,478

    Last Listing Agent Paul Boronow William Penn Real Estate Assoc

    788 Buck Rd, Quarryville, PA 17566
  • 445 447 Camargo Rd, Quarryville, PA 17566
    445 447 Camargo Rd, Quarryville, PA 17566
    445 447 Camargo Rd, Quarryville, PA 17566
    /88

    $1,200,000 Sold Jun 30, 2025

    445 447 Camargo Rd, Quarryville, PA 17566

    • 6 Beds
    • 2 Baths
    • 2,628 Sq Ft
    • Built 1920

    Last Sold Summary

    • $457/SF
    • 28 Days On Market

    Last Listing Agent Chester Lapp William Penn Real Estate Assoc

    445 447 Camargo Rd, Quarryville, PA 17566
  • 104 S Hess St, Quarryville, PA 17566
    104 S Hess St, Quarryville, PA 17566
    104 S Hess St, Quarryville, PA 17566
    /13

    $235,900 Sold Jul 25, 2025

    104 S Hess St, Quarryville, PA 17566

    • 3 Beds
    • 1.5 Baths
    • 1,932 Sq Ft
    • Built 1900

    Last Sold Summary

    • $122/SF
    • 3 Days On Market

    Current Estimated Value $241,550

    Last Listing Agent Jon Gordon Manor West Realty

    104 S Hess St, Quarryville, PA 17566
  • 51 Evans Dr, Quarryville, PA 17566
    51 Evans Dr, Quarryville, PA 17566
    51 Evans Dr, Quarryville, PA 17566
    /26

    $274,900 Sold Nov 06, 2025

    51 Evans Dr, Quarryville, PA 17566

    • 3 Beds
    • 1.5 Baths
    • 1,360 Sq Ft
    • Built 2000

    Last Sold Summary

    • $202/SF
    • 1 Day On Market

    Current Estimated Value $277,400

    Last Listing Agent Tami Shaub Hostetter Realty

    51 Evans Dr, Quarryville, PA 17566
  • 232 Circle Dr, Quarryville, PA 17566
    232 Circle Dr, Quarryville, PA 17566
    232 Circle Dr, Quarryville, PA 17566
    /36

    $325,500 Sold Nov 25, 2025

    232 Circle Dr, Quarryville, PA 17566

    • 3 Beds
    • 2 Baths
    • 1,575 Sq Ft
    • Built 1961

    Last Sold Summary

    • $207/SF
    • 3 Days On Market

    Current Estimated Value $321,944

    Last Listing Agent Thomas Kreider Berkshire Hathaway HomeServices Homesale Realty

    232 Circle Dr, Quarryville, PA 17566
  • 214 Fite Way, Quarryville, PA 17566
    214 Fite Way, Quarryville, PA 17566
    214 Fite Way, Quarryville, PA 17566
    /39

    $435,000 Sold Aug 25, 2025

    214 Fite Way, Quarryville, PA 17566

    • 2 Beds
    • 2.5 Baths
    • 2,287 Sq Ft
    • Built 2008

    Last Sold Summary

    • $190/SF
    • 28 Days On Market

    Current Estimated Value $447,275

    Last Listing Agent Scott Osborne Realty Professional Group LLC

    214 Fite Way, Quarryville, PA 17566
  • 14 Springside Dr, Quarryville, PA 17566
    14 Springside Dr, Quarryville, PA 17566
    14 Springside Dr, Quarryville, PA 17566
    /41

    $355,000 Sold Jun 06, 2025

    14 Springside Dr, Quarryville, PA 17566

    • 3 Beds
    • 2 Baths
    • 1,700 Sq Ft
    • Built 1973

    Last Sold Summary

    • $209/SF
    • 5 Days On Market

    Current Estimated Value $376,809

    Last Listing Agent Tom Taglieri Coldwell Banker Realty

    14 Springside Dr, Quarryville, PA 17566
  • 14 W State St, Quarryville, PA 17566
    14 W State St, Quarryville, PA 17566
    14 W State St, Quarryville, PA 17566
    /43

    $319,900 Sold Jun 30, 2025

    14 W State St, Quarryville, PA 17566

    • 3 Beds
    • 2 Baths
    • 1,314 Sq Ft
    • Built 1946

    Last Sold Summary

    • $243/SF
    • 8 Days On Market

    Current Estimated Value $320,989

    Last Listing Agent Amarilys Rivera Berkshire Hathaway HomeServices Homesale Realty

    14 W State St, Quarryville, PA 17566
  • 67 Center Rd, Quarryville, PA 17566
    67 Center Rd, Quarryville, PA 17566
    67 Center Rd, Quarryville, PA 17566
    /74

    $495,000 Sold Jul 18, 2025

    67 Center Rd, Quarryville, PA 17566

    • 3 Beds
    • 2 Baths
    • 2,172 Sq Ft
    • Built 1972

    Last Sold Summary

    • $228/SF
    • 45 Days On Market

    Current Estimated Value $506,489

    Last Listing Agent Tom DeLong Life Changes Realty Group

    67 Center Rd, Quarryville, PA 17566
  • 1 Ridgewood Rd, Quarryville, PA 17566
    1 Ridgewood Rd, Quarryville, PA 17566
    1 Ridgewood Rd, Quarryville, PA 17566
    /4

    $609,215 Sold May 15, 2025

    1 Ridgewood Rd, Quarryville, PA 17566

    • 3 Beds
    • 2 Baths
    • 1,701 Sq Ft

    Last Sold Summary

    • $358/SF
    • 0 Days On Market

    Last Listing Agent Dina Avvakumova Beiler-Campbell Realtors-Kennett Square

    1 Ridgewood Rd, Quarryville, PA 17566
  • 977 Dry Wells Rd, Quarryville, PA 17566
    977 Dry Wells Rd, Quarryville, PA 17566
    977 Dry Wells Rd, Quarryville, PA 17566
    /37

    $365,000 Sold Sep 04, 2025

    977 Dry Wells Rd, Quarryville, PA 17566

    • 3 Beds
    • 1.5 Baths
    • 1,872 Sq Ft
    • Built 2002

    Last Sold Summary

    • $195/SF
    • 12 Days On Market

    Current Estimated Value $376,078

    Last Listing Agent Trish Gesswein Houwzer, LLC

    977 Dry Wells Rd, Quarryville, PA 17566
  • 8 N Church St, Quarryville, PA 17566
    8 N Church St, Quarryville, PA 17566
    8 N Church St, Quarryville, PA 17566
    /31

    $250,000 Sold Sep 19, 2025

    8 N Church St, Quarryville, PA 17566

    • 3 Beds
    • 2 Baths
    • 1,085 Sq Ft
    • Built 1910

    Last Sold Summary

    • $230/SF
    • 4 Days On Market

    Current Estimated Value $251,319

    Last Listing Agent Jessica Braun RE/MAX Of Reading

    8 N Church St, Quarryville, PA 17566
  • 11 E State St, Quarryville, PA 17566
    11 E State St, Quarryville, PA 17566
    11 E State St, Quarryville, PA 17566
    /6

    $375,000 Sold Jun 30, 2025

    11 E State St, Quarryville, PA 17566

    • Studio
    • 2,658 Sq Ft
    • Built 1910

    Last Sold Summary

    • $141/SF
    • 2 Days On Market

    Current Estimated Value $385,984

    Last Listing Agent Cheryl McFadden Howard Hanna Real Estate Services - Lancaster

    11 E State St, Quarryville, PA 17566
  • 435 Blackburn Rd, Quarryville, PA 17566
    435 Blackburn Rd, Quarryville, PA 17566
    435 Blackburn Rd, Quarryville, PA 17566
    /99

    $617,000 Sold Jul 11, 2025

    435 Blackburn Rd, Quarryville, PA 17566

    • 3 Beds
    • 2 Baths
    • 2,307 Sq Ft
    • Built 1988

    Last Sold Summary

    • $267/SF
    • 36 Days On Market

    Current Estimated Value $621,713

    Last Listing Agent Thomas Stewart Cavalry Realty LLC

    435 Blackburn Rd, Quarryville, PA 17566
  • 6 Brackbill Ct, Quarryville, PA 17566
    6 Brackbill Ct, Quarryville, PA 17566
    6 Brackbill Ct, Quarryville, PA 17566
    /16

    $72,000 Sold Oct 22, 2025

    6 Brackbill Ct, Quarryville, PA 17566

    • 2 Beds
    • 1 Bath
    • 890 Sq Ft
    • Built 2020

    Last Sold Summary

    • $81/SF
    • 85 Days On Market

    Last Listing Agent Andrew Nelson Coldwell Banker Realty

    6 Brackbill Ct, Quarryville, PA 17566
  • 328 Springville Rd, Quarryville, PA 17566
    328 Springville Rd, Quarryville, PA 17566
    328 Springville Rd, Quarryville, PA 17566
    /17

    $431,500 Sold Apr 14, 2026

    328 Springville Rd, Quarryville, PA 17566

    • 3 Beds
    • 1.5 Baths
    • 2,092 Sq Ft
    • Built 1987

    Last Sold Summary

    • 5% Above List Price
    • $206/SF
    • 3 Days On Market

    Current Estimated Value $509,676

    Last Listing Agent Joanna Hightower BHHS Fox & Roach-Haverford

    328 Springville Rd, Quarryville, PA 17566
  • 110 S Summit Ave, Quarryville, PA 17566
    110 S Summit Ave, Quarryville, PA 17566
    110 S Summit Ave, Quarryville, PA 17566
    /30

    $312,650 Sold May 23, 2025

    110 S Summit Ave, Quarryville, PA 17566

    • 4 Beds
    • 2 Baths
    • 1,410 Sq Ft
    • Built 1930

    Last Sold Summary

    • $222/SF

    Current Estimated Value $317,994

    Last Listing Agent Julie Nelson Kingsway Realty - Lancaster

    110 S Summit Ave, Quarryville, PA 17566
  • 1211 River Rd, Quarryville, PA 17566
    1211 River Rd, Quarryville, PA 17566
    1211 River Rd, Quarryville, PA 17566
    /33

    $330,000 Sold Jan 13, 2026

    1211 River Rd, Quarryville, PA 17566

    • 4 Beds
    • 1 Bath
    • 2,496 Sq Ft
    • Built 1946

    Last Sold Summary

    • 6% Above List Price
    • $132/SF
    • 8 Days On Market

    Current Estimated Value $330,674

    Last Listing Agent Don Helsel Berkshire Hathaway HomeServices Homesale Realty

    1211 River Rd, Quarryville, PA 17566
  • 210 Park Ave, Quarryville, PA 17566
    210 Park Ave, Quarryville, PA 17566
    210 Park Ave, Quarryville, PA 17566
    /28

    $135,000 Sold May 20, 2025

    210 Park Ave, Quarryville, PA 17566

    • 3 Beds
    • 1 Bath
    • 1,494 Sq Ft
    • Built 1880

    Last Sold Summary

    • $90/SF
    • 34 Days On Market

    Current Estimated Value $136,797

    Last Listing Agent Ron Mummau Berkshire Hathaway HomeServices Homesale Realty

    210 Park Ave, Quarryville, PA 17566
  • 336 W Fritz Ave, Quarryville, PA 17566
    336 W Fritz Ave, Quarryville, PA 17566
    /2

    $497,225 Sold Sep 17, 2025

    336 W Fritz Ave, Quarryville, PA 17566

    • 4 Beds
    • 2.5 Baths
    • 1,850 Sq Ft

    Last Sold Summary

    • $269/SF
    • 275 Days On Market

    Last Listing Agent Mark Will Keller Williams Elite

    336 W Fritz Ave, Quarryville, PA 17566
  • 19 Springside Dr, Quarryville, PA 17566
    19 Springside Dr, Quarryville, PA 17566
    19 Springside Dr, Quarryville, PA 17566
    /25

    $359,900 Sold Sep 26, 2025

    19 Springside Dr, Quarryville, PA 17566

    • 3 Beds
    • 2 Baths
    • 1,300 Sq Ft
    • Built 1972

    Last Sold Summary

    • $277/SF
    • 1 Day On Market

    Current Estimated Value $361,123

    Last Listing Agent Patrick Curran BHHS Fox & Roach-Kennett Sq

    19 Springside Dr, Quarryville, PA 17566
  • 116 N Summit Ave, Quarryville, PA 17566
    116 N Summit Ave, Quarryville, PA 17566
    116 N Summit Ave, Quarryville, PA 17566
    /45

    $485,000 Sold Oct 20, 2025

    116 N Summit Ave, Quarryville, PA 17566

    • 4 Beds
    • 2.5 Baths
    • 2,690 Sq Ft
    • Built 2004

    Last Sold Summary

    • $180/SF
    • 3 Days On Market

    Current Estimated Value $499,627

    Last Listing Agent David Wissler Coldwell Banker Realty

    116 N Summit Ave, Quarryville, PA 17566
  • 259 Lamparter Rd, Quarryville, PA 17566
    259 Lamparter Rd, Quarryville, PA 17566
    259 Lamparter Rd, Quarryville, PA 17566
    /71

    $665,000 Sold Jun 05, 2025

    259 Lamparter Rd, Quarryville, PA 17566

    • 6 Beds
    • 4.5 Baths
    • 4,000 Sq Ft
    • Built 1996

    Last Sold Summary

    • $166/SF
    • 157 Days On Market

    Current Estimated Value $674,690

    Last Listing Agent Jayme Webster Long & Foster Real Estate, Inc.

    259 Lamparter Rd, Quarryville, PA 17566

Showing Results 41 - 80, Page 2 of 2

Pennsylvania Lancaster County Quarryville

Recently Sold Real Estate & Homes in Quarryville, PA

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