| Business | Phone |
| Amaro & Son Inc 7824 Beechcraft Ave, Gaithersburg 20879 | (301) 947-9330 |
| Amcon Inc 10 Park Ave, Gaithersburg 20877 | (301) 924-4910 |
| Araujo Construction Co 18213 Flower Hill Way # A, Gaithersburg 20879 | (301) 258-8800 |
| Barros Concrete 18231 Flower Hill Way # D, Gaithersburg 20879 | (301) 216-2747 |
| Braga Construction 18223 Flower Hill Way # A, Gaithersburg 20879 | (301) 921-7979 |
| Solmar Construction Co Gaithersburg 20877 | (301) 963-8112 |
| Patriot Concrete Inc 18231 Flower Hill Way # D, Gaithersburg 20879 | (301) 258-0099 |
| Estate Contractors 5 N Frederick Ave, Gaithersburg 20877 | (301) 948-2222 |
| Andres Hegar 8120 Brucar Ct, Gaithersburg 20877 | (301) 926-9539 |