| Business | Phone |
| Macon Metal 9113 Hampton Overlook, Capitol Heights 20743 | (301) 333-0610 |
| Metro Test & Balance Inc 8640 Edgeworth Dr, Capitol Heights 20743 | (301) 808-3660 |
| S & S Mechanical 9244 E Hampton Dr, Capitol Heights 20743 | (301) 350-8026 |
| C M C Sheet Metal 1208 Marblewood Ave, Capitol Heights 20743 | (301) 925-4040 |
| Fen-Cou Corp 8641 Ashwood Dr, Capitol Heights 20743 | (301) 350-2655 |
| Gibson's Sheet Metal 1312 Ritchie Rd, Capitol Heights 20743 | (301) 336-9214 |