| Business | Phone |
| Building Technology Inc 1109 Spring St # 409, Silver Spring 20910 | (301) 588-5020 |
| Carls Group 1329 Gresham Rd, Silver Spring 20904 | (301) 384-1166 |
| Ray Goetz Home Inspection Svc 13421 Tamarack Rd, Silver Spring 20904 | (301) 879-2096 |
| P H Wietsma Building Consultnt 1109 Kathryn Rd, Silver Spring 20904 | (301) 622-9673 |