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Prefer PDFs? A printer-friendly PDF of this list is available. Download PDF file Prefer Excel? A complete spreadsheet of this list is available. Download Excel file Knox County Office Buildings Ranked According to Gross Square Footage Rank '20 Building Gross sq. footage Rentable sq. footage Vacant sq. footage Building age Renovated Lease terms Occupant type1 Major tenants Owner Leasing/management co. Contact Office phone 1 City County Building 400 Main St. Knoxville, TN 37902 531,634 456,577 0 26-50 years Yes NA Owner City of Knoxville, Knox County Government Public Building Authority 400 Main St., Ste. M22 Knoxville, TN 37902 Public Building Authority Jayne Burritt 865-215-2121 2 First Horizon Plaza 800 S. Gay St. Knoxville, TN 37929 469,672 NA NA 26-50 years Yes 3-5 years Leased First Horizon Bank, Brunswick Boat Group, Kramer Rayson, KPMG Tennessee Holdings 390 Berry St., Ste. 200 Brooklyn, NY 11211 NA Jay Cobble 865-777-0202 3 Riverview Tower 900 S. Gay St. Knoxville, TN 37929 367,000 334,196 57,889 26-50 years NA 3-5 years Leased Truist, Woolf McClane, LHP Capital Hertz Knoxville One 1522 2nd St. Santa Monica, CA 90401 SVN | Wood Properties George Brown 865-637-7777 4 TVA West Tower 400 W. Summit Hill Drive Knoxville, TN 37902 345,797 322,068 0 26-50 years Yes2 NA Owner Tennessee Valley Authority United States of America (TVA) 400 W. Summit Hill Drive Knoxville, TN 37902 Tennessee Valley Authority Kathy L. McGinley 865-632-4845 5 Discovery, Inc. 9721 Sherrill Blvd. Knoxville, TN 37919 342,250 342,250 0 26-50 years Yes NA Owner Discovery, Inc. Discovery, Inc. 9721 Sherrill Blvd. Knoxville, TN 37932 NA NA 865-694-2700 6 Howard H. Baker Jr. U.S. Courthouse 800 Market St. Knoxville, TN 37902 330,000 280,500 0 26-50 years Yes Negotiable Owner U.S. Government United States of America (GSA) 401 Peachtree St. W. Region IV, Ste. 2812 Atlanta, GA 30365 General Services Administration Catherine Brasher 865-545-4330 7 AT&T 410 W. Magnolia Ave. Knoxville, TN 37917 309,348 309,348 0 51+ years No NA Owner AT&T AT&T Comm. of South Central States 340 Mt. Kemble Ave. Morristown, NJ 07962 NA NA 865-769-5799 8 Siemens Medical Solutions USA 810 Innovation Drive Knoxville, TN 37932 239,000 239,000 NA 26-50 years Yes NA Owner Siemens Healthineers CTI Molecular Imaging 810 Innovation Drive Knoxville, TN 37932 NA NA 865-218-2351 9 TVA East Tower 400 W. Summit Hill Drive Knoxville, TN 37902 238,535 211,667 0 26-50 years Yes2 NA Government Knox County United States of America (TVA) 400 W. Summit Hill Drive Knoxville, TN 37902 Tennessee Valley Authority Kathy L. McGinley 865-632-4845 10 Langley Building 520 W. Summit Hill Drive Knoxville, TN 37902 228,127 NA NA 26-50 years Yes Negotiable Both Barge Design Solutions, Pattison Sign Group, FirstBank FL Summit Hill 520 W. Summit Hill Drive Knoxville, TN 37902 NA Jay Cobble 865-777-0202 11 Landmark Center 1111 N. Northshore Drive Knoxville, TN 37849 223,370 190,203 23,0003 26-50 years Yes Negotiable Leased Morgan Stanley, Pinnacle Bank, Navistar Cooper Commercial Properties 903 N. 47th St. Rogers, AR 72756 Avison Young John Adams, Justin Cazana 865-450-8883 12 Cherokee Mills 2200 Sutherland Ave. Knoxville, TN 37919 210,000 186,350 12,125 100+ years Yes NA Leased Pershing Yoakley & Associates, University Health System, East Tennessee Children’s Hospital Magnolia Cherokee Mills, L.P. 2220 Sutherland Ave. Knoxville, TN 37919 Avison Young John Adams 865-450-8883 12 Brookview Town Centre 234 Brookview Centre Way Knoxville, TN 37919 210,000 194,228 6,900 6-15 years No 5-10 years Leased TeamHealth, Anderson Management Services, Baker Donelson Law Firm, Willis, New York Life Blue Ridge Realty 265 Brookview Centre Way, Ste. 602 Knoxville, TN 37919 Blue Ridge Realty Louise R. Frazier 865-963-8981 14 News Sentinel Building 2332 News Sentinel Drive Knoxville, TN 37932 179,790 179,790 0 18 years No NA Owner Knoxville News Sentinel Gannett 7950 Jones Branch Drive McLean, VA 22102 NA NA 844-900-7097 15 John J. Duncan Federal Building 710 Locust St. Knoxville, TN 37902 172,683 146,780 0 26-50 years NA NA Owner Internal Revenue Service, U.S. Dept. of Housing & Urban Development United States of America (GSA) 77 Forsyth St., Ste. 400 Atlanta, GA 30303 General Services Administration Catherine Brasher 865-545-4330 16 Miller's Building 445 S. Gay St. Knoxville, TN 37929 169,872 NA NA 51+ years Yes 5 years Both Knoxville Utilities Board Knoxville Utilities Board 4505 Middlebrook Pike Knoxville, TN 37921 NA NA 865-246-1331 17 Windsor Park 120-298 N. Seven Oaks Drive Knoxville, TN 37922 167,633 167,633 0 26-50 years Yes Negotiable Leased EdFinancial Services, Southeast Bank, TBL contract center, Ross Education, Hoffmann Group Windsor Partners, LLC 8907 Linksvue Drive Knoxville, TN 37922 IMS Inc. Deborah Petrolina 865-522-5500 18 William F. Conley Building4 505 S. Gay St. Knoxville, TN 37929 163,376 NA NA NA NA Negotiable Both NA Universal Properties 507 S. Gay St., Ste. 908 Knoxville, TN 37902 NA NA 865-637-1809 1 Both refers to owner-occupied and tenant-occupied building; 2 Currently in-progress; 3 Largest vacant suite, 4,256 sq. ft.; 4 Source declined to participate. Information from 2014 Property Market report Source: Individual property managers, property websites. NA=not applicable or not available. This list and other Knoxville-area market data are available as Excel spreadsheets at www.knoxvillebookoflists.com. If you notice an error or omission, please contact Hayley Choy at 865-342-6494 or lists@knoxvillebiz.com.