| Business | Phone |
| Capitol Vintage Windows Inc Columbia 21044 | (410) 997-4144 |
| Guardian Door & Window 6400 Waterloo Rd, Columbia 21045 | (410) 799-9998 |
| Liberty Windows & Siding Inc 10429 Owen Brown Rd, Columbia 21044 | (410) 715-1232 |
| Premier Window & Building Inc Columbia 21044 | (410) 997-1711 |