Licensed Professional Details
Robert Calloway , P.E., President
6310 Hillside Court Suite 200 Columbia, MD 21046 Phone: (301) 829-1642 Email: gfsenergystar@gfsolutionsllc.comVerifications: 477
Credentials: Professional Engineer
Licensed in: MD, DC, VA, AL, CA, FL, HI, MA, NC, NY, PA, SC
Cost-free verification offered: Yes, 5 verifications available nationwide.
Types of properties verified: Mixed Use Property, Multifamily Housing, Office
All Verifications
Export Results| Property Type | Square Feet | City | State | Zip | Years Recognized |
|---|---|---|---|---|---|
| Office | 521,568 | Washington | DC | 20004 | 2011, 2012, 2013, 2020, 2021, 2022, 2023, 2024 |
| Office | 69,220 | San Mateo | CA | 94402 | 2020, 2021, 2022, 2023, 2024 |
| Office | 138,449 | Reston | VA | 20190 | 2011, 2012, 2013 |
| Office | 102,579 | Ogden | UT | 84401 | 2018, 2023 |
| Office | 159,950 | Centreville | VA | 20120 | 2012, 2014, 2015, 2016 |
| Office | 543,682 | Washington | DC | 20001 | 2012, 2016 |
| Office | 155,808 | Washington | DC | 20036 | 2012, 2013 |
| Office | 252,876 | Alexandria | VA | 22314 | 2010, 2011, 2012, 2013, 2014, 2015, 2016 |
| Office | 271,756 | Alexandria | VA | 22312 | 2020, 2021, 2022, 2023, 2024 |
| Office | 208,221 | McLean | VA | 22102 | 2010, 2011, 2012, 2013, 2015 |
| Office | 158,384 | Washington | DC | 20006 | 2011, 2012, 2013 |
| Mixed Use Property | 230,531 | Denver | CO | 80202 | 2023, 2024 |
| Office | 251,707 | Washington | DC | 20037 | 2011, 2012, 2013, 2014, 2015, 2016 |
| Office | 206,976 | Washington | DC | 20015 | 2012, 2013, 2014, 2015, 2016 |
| Office | 218,054 | Arlington | VA | 22201 | 2013, 2014, 2015, 2016 |
| Office | 30,125 | Washington | DC | 20001 | 2012, 2013 |
| Office | 66,729 | Salt Lake City | UT | 84101 | 2020, 2021, 2022, 2023, 2024 |
| Office | 49,582 | Reston | VA | 20191 | 2012 |
| Office | 112,578 | Washington | DC | 20036 | 2020, 2021, 2022, 2023 |
| Office | 292,089 | Arlington | VA | 22209 | 2010, 2012 |
| Office | 360,805 | Washington | DC | 20005 | 2012, 2013, 2014, 2015 |
| Office | 364,177 | Baltimore | MD | 21202 | 2011, 2012, 2013, 2014, 2015, 2016 |
| Office | 39,235 | Boulder | CO | 80301 | 2021, 2022, 2023, 2024 |
| Office | 67,103 | Boulder | CO | 80301 | 2021, 2022, 2023, 2024 |
| Office | 262,019 | Washington | DC | 20004 | 2014, 2015, 2016, 2020, 2021, 2022, 2023, 2024 |
| Office | 134,712 | McLean | VA | 22102 | 2010, 2011, 2012, 2013 |
| Office | 114,595 | Washington | DC | 20006 | 2011, 2012 |
| Office | 157,300 | Alexandria | VA | 22314 | 2013, 2014 |
| Office | 47,021 | Glen Allen | VA | 23059 | 2015 |
| Office | 142,957 | Emeryville | CA | 94608 | 2021, 2022, 2023 |
| Office | 96,445 | Centreville | VA | 20120 | 2010, 2012, 2013, 2014, 2015, 2016, 2017 |
| Office | 398,837 | Washigton | DC | 20001 | 2012, 2013 |
| Office | 140,602 | Washington | DC | 20036 | 2010, 2011, 2012, 2013, 2014, 2015 |
| Office | 31,532 | Boulder | CO | 80301 | 2021, 2022, 2023, 2024 |
| Office | 179,564 | San Mateo | CA | 94402 | 2020, 2021, 2022, 2023, 2024 |
| Office | 206,463 | McLean | VA | 22102 | 2011, 2012 |
| Office | 577,347 | Arlington | VA | 22202 | 2011, 2012, 2013, 2020, 2021, 2022, 2023, 2024 |
| Office | 159,194 | San Mateo | CA | 94402 | 2020, 2021, 2022, 2023, 2024 |
| Office | 247,733 | Boston | MA | 02115 | 2014 |
| Office | 261,955 | Washington | DC | 20036 | 2011, 2012, 2013, 2014, 2015, 2016 |
| Office | 377,654 | Washington | DC | 20036 | 2010, 2012, 2013, 2021, 2022, 2023, 2024 |
| Office | 1,136,283 | Boston | MA | 02108 | 2013, 2014 |
| Office | 377,018 | Arlington | VA | 22202 | 2011, 2012, 2014, 2020, 2021, 2022, 2023, 2024 |
| Office | 122,460 | Washington | DC | 20036 | 2012, 2013 |
| Office | 252,713 | Washington | DC | 20005 | 2013, 2014, 2015, 2016, 2017, 2020, 2021, 2022, 2023, 2024 |
| Office | 61,173 | Washington | DC | 20036 | 2012, 2013 |
| Office | 156,218 | Centreville | VA | 20120 | 2014, 2015, 2017 |
| Office | 242,298 | Washington | DC | 20006 | 2012, 2013, 2014, 2015, 2016 |
| Office | 351,117 | Fairfax | VA | 22182 | 2012, 2013 |
| Office | 83,622 | Austin | TX | 78702 | 2023, 2024 |
| Office | 103,932 | Hanover | MD | 21076 | 2013, 2014, 2015 |
| Office | 120,921 | Washington | DC | 20002 | 2012, 2013 |
| Office | 308,250 | Washington | DC | 20005 | 2012, 2013 |
| Office | 101,497 | Salt Lake City | UT | 84101 | 2020, 2021, 2022, 2023, 2024 |
| Office | 89,223 | Washington | DC | 20036 | 2014, 2015, 2016 |
| Office | 165,571 | Bethesda | MD | 20814 | 2012, 2015 |
| Office | 1,088,373 | Chicago | IL | 60602-3902 | 2020, 2021, 2022, 2023, 2024 |
| Office | 326,461 | Washington | DC | 20005 | 2014, 2015, 2016 |
| Office | 223,847 | Reston | VA | 20190 | 2010, 2012, 2013 |
| Office | 615,281 | Washington | DC | 20036 | 2014, 2015, 2016 |
| Office | 108,209 | Washington | DC | 20036 | 2013 |
| Office | 247,330 | Washington | DC | 20001 | 2011, 2012, 2013 |
| Office | 251,116 | Washington | DC | 20005 | 2013, 2014 |
| Office | 214,622 | Washington | DC | 20005 | 2015, 2016 |
| Office | 155,710 | Alexandria | VA | 22310 | 2020, 2024 |
| Office | 194,103 | Rockville | MD | 20852 | 2015, 2016 |
| Office | 62,649 | Boulder | CO | 80301 | 2021, 2022 |
| Office | 446,826 | Vienna | VA | 22182 | 2012, 2013, 2015, 2016 |
| Office | 125,356 | Salt Lake City | UT | 84101 | 2021, 2022, 2023, 2024 |
| Office | 109,335 | Washington | DC | 20005 | 2016, 2020 |
| Office | 299,905 | Washington | DC | 20001 | 2016, 2020 |
| Office | 195,550 | Bethesda | MD | 20817 | 2011, 2015, 2016 |
| Office | 102,441 | Washington | DC | 20037 | 2011, 2012 |
| Office | 1,428,147 | Washington | DC | 20224 | 2011, 2012, 2013, 2014 |
| Office | 837,457 | San Francisco | CA | 94103 | 2020, 2021, 2022, 2023, 2024 |
| Office | 1,223,347 | Boston | MA | 02109 | 2020, 2021, 2022, 2023, 2024 |
| Office | 691,229 | San Francisco | CA | 94104 | 2020, 2021, 2022, 2023, 2024 |
| Office | 259,265 | Seattle | WA | 98121 | 2020, 2021, 2022, 2023, 2024 |
| Office | 882,560 | Chicago | IL | 60603 | 2020, 2023, 2024 |
| Office | 329,220 | Washington, D.C. | DC | 20037 | 2020, 2021, 2022, 2023, 2024 |
| Office | 373,060 | Seattle | WA | 98101 | 2020, 2021, 2022, 2023, 2024 |
| Office | 413,880 | Seattle | WA | 98101 | 2020, 2021, 2022, 2023, 2024 |
| Office | 222,310 | Pasadena | CA | 91101 | 2020, 2021, 2022, 2023, 2024 |
| Office | 544,476 | Glendale | CA | 91203 | 2020, 2021, 2022, 2023, 2024 |
| Office | 1,015,129 | Chicago | IL | 60601 | 2020, 2021, 2022, 2023, 2024 |
| Office | 522,203 | Oakland | CA | 94612 | 2020, 2021, 2022, 2023, 2024 |
| Office | 177,436 | Alexandria | VA | 22310 | 2020, 2024 |
| Office | 258,580 | San Jose | CA | 95113 | 2021, 2022, 2023, 2024 |
| Office | 1,178,147 | Chicago | IL | 60604 | 2020, 2021, 2022, 2023, 2024 |
| Office | 757,990 | Chicago | IL | 60654 | 2020, 2021, 2022, 2023, 2024 |
| Office | 134,396 | Alexandria | VA | 22310 | 2020, 2021, 2022, 2023 |
| Office | 545,282 | New York | NY | 10017 | 2020, 2021, 2022, 2023, 2024 |
| Office | 1,316,894 | Denver | CO | 80203 | 2020, 2021, 2022, 2023, 2024 |
| Office | 137,570 | Alexandria | VA | 22310 | 2020, 2021 |
| Office | 265,380 | San Francisco | CA | 94111 | 2020, 2021, 2022, 2023, 2024 |
| Office | 579,000 | Denver | CO | 80202 | 2020, 2021, 2022, 2023, 2024 |
| Office | 102,893 | Alexandria | VA | 22310 | 2020, 2023, 2024 |
| Office | 486,281 | Glendale | CA | 91203 | 2020, 2021, 2022, 2023, 2024 |
| Office | 330,797 | Alexandria | VA | 22310 | 2020, 2022, 2023 |
| Office | 70,060 | Los Angeles | CA | 90045 | 2020, 2021, 2022, 2023, 2024 |
| Office | 193,434 | Salt Lake City | UT | 84101 | 2021, 2022, 2023, 2024 |
| Office | 28,884 | Boulder | CO | 80301 | 2021, 2022, 2023, 2024 |
| Office | 39,235 | Boulder | CO | 80301 | 2021, 2022, 2023 |
| Office | 589,377 | Austin | TX | 78701 | 2022, 2023, 2024 |
| Office | 106,863 | Denver | CO | 80202 | 2021, 2022, 2023, 2024 |
| Office | 954,047 | Houston | TX | 77002 | 2021, 2022, 2023, 2024 |
| Office | 119,747 | Englewood | CO | 80112 | 2022, 2023, 2024 |
| Office | 128,666 | Wellesley Hills | MA | 02481 | 2022, 2023, 2024 |
| Office | 95,105 | Los Angeles | CA | 90045 | 2022, 2023, 2024 |
| Office | 282,765 | Wellesley | MA | 02481 | 2022, 2024 |
| Office | 606,241 | Denver | CO | 80202 | 2022, 2023, 2024 |
| Office | 173,280 | Austin | TX | 78702 | 2023, 2024 |
| Office | 205,656 | Washington | DC | 20005 | 2012, 2013 |
| Office | 345,776 | WASHINGTON D C | DC | 20001 | 2016, 2017 |
| Office | 238,127 | Washington | DC | 20001 | 2013, 2016, 2024 |
| Office | 199,567 | Arlington | VA | 22206 | 2015, 2016 |
| Office | 127,910 | Wellesley Hills | MA | 02481 | 2022 |
| Office | 128,711 | Washington | DC | 20001 | 2013 |
| Office | 17,823 | Waco | TX | 76710-2978 | 2023 |
| Office | 881,803 | White Plains | NY | 10601 | 2014 |
| Office | 30,872 | Durham | NC | 27703-8228 | 2022 |
| Office | 164,608 | Alexandria | VA | 22310 | 2020 |
| Office | 73,438 | Omaha | NE | 68110 | 2024 |
| Office | 56,104 | Rockville | MD | 20857 | 2021 |
| Office | 149,720 | Washington | DC | 20005 | 2020 |
| Office | 52,873 | Washington | DC | 20036 | 2020 |
| Office | 149,219 | Washington | DC | 20036 | 2011 |
| Office | 70,000 | Germantown | MD | 20876 | 2013 |
| Multifamily Housing | 745,057 | Columbia | MD | 21044 | 2020 |
| Office | 119,045 | Washington | DC | 20032 | 2024 |
| Office | 120,882 | Glen Allen | VA | 23059 | 2015 |
| Multifamily Housing | 461,717 | Columbia | MD | 21044 | 2021 |
| Office | 54,610 | Centennial | CO | 80111 | 2024 |
| Office | 96,924 | Rockville | MD | 20852 | 2020 |
| Office | 145,476 | Vienna | VA | 22182 | 2012 |
| Office | 177,000 | Washington D.C. | DC | 20005 | 2014 |
| Office | 102,623 | Alexandria | VA | 22314 | 2012 |
| Office | 474,756 | Denver | CO | 80290 | 2022 |
| Office | 172,953 | McLean | VA | 22102 | 2012 |
| Office | 226,961 | Vienna | VA | 22182 | 2012 |
| Office | 153,440 | Washington | DC | 20001 | 2013 |
| Office | 126,876 | Arlington | VA | 22201 | 2014 |
| Office | 102,985 | Washington | DC | 20001 | 2012 |
| Office | 615,565 | El Segundo | CA | 90245 | 2024 |
| Office | 28,936 | Boulder | CO | 80301 | 2021 |
| Office | 326,126 | Washington | DC | 20036 | 2010 |
| Office | 316,056 | Washington | DC | 20007 | 2011 |
| Office | 162,019 | Denver | CO | 80202 | 2024 |
| Office | 149,452 | Vienna | VA | 22182 | 2013 |
| Office | 70,000 | Germantown | MD | 20876 | 2013 |
| Office | 1,054,988 | El Segundo | CA | 90245 | 2024 |
| Office | 379,147 | Washington | DC | 20002 | 2012 |
| Office | 264,830 | New York | NY | 10001 | 2024 |
| Office | 100,173 | Silver Spring | MD | 20910 | 2013 |
| Office | 437,793 | Fairfax | VA | 22031 | 2020 |
| Office | 43,248 | Baltimore | MD | 21231 | 2012 |
| Office | 128,255 | Towson | MD | 21286 | 2013 |
| Office | 98,876 | Centreville | VA | 20120 | 2012 |
| Office | 22,881 | Boulder | CO | 80301 | 2022 |
| Office | 233,595 | Arlington | VA | 22206 | 2014 |