| Business | Phone |
| American Professional Chimney 730 12th St Nw, Washington 20005 | (202) 563-0887 |
| Capitol Hill Masonry 1260 Holbrook Ter Ne # 200, Washington 20002 | (202) 397-3164 |
| House Beautiful 23 Galveston St Sw # 104, Washington 20032 | (202) 352-4361 |
| International Masonry Inst 1776 I St Nw # 601, Washington 20006 | (202) 783-3908 |
| Michaliga Masonry 321 C St Se, Washington 20003 | (202) 544-4484 |
| Patterson Home Improvements 616 T St Nw, Washington 20001 | (202) 332-4014 |
| R J Masonry & Home Imprvmnt 137 P St Nw, Washington 20001 | (202) 397-4140 |
| T & D Co 3230 Wheeler Rd Se, Washington 20032 | (202) 561-2661 |
| T R Sellheim Construction Corp 910 17th St Nw, Washington 20006 | (202) 362-1700 |