| Business | Phone |
| Trilith Builders Inc 10315 Kensington Pkwy # 209, Kensington 20895 | (301) 933-3266 |
| Barret Diversified Ind Corp 3702 Emily St, Kensington 20895 | (301) 949-8899 |
| Heidenberger Construction Inc 10524 Detrick Ave, Kensington 20895 | (301) 942-6444 |