| Business | Phone |
| A Action Electric Columbia 21044 | (410) 730-0025 |
| Bodhi Electric Co 7260c Eden Brook Dr # 203, Columbia 21046 | (410) 290-8800 |
| Bopat Electric 9130 Red Branch Rd # H, Columbia 21045 | (410) 995-1715 |
| Bray Electric Inc Columbia 21044 | (410) 730-2098 |
| Bruno's Electrical Svc Inc 9693 Gerwig Ln # T, Columbia 21046 | (410) 381-6900 |
| Ceco Inc 6770 Oak Hall Ln # 117, Columbia 21045 | (410) 995-6270 |
| Citadel Construction Co Po Box 6, Columbia 21045 | (301) 725-4568 |
| Electric Masters Svc Inc 8801 Stonebrook Ln, Columbia 21046 | (410) 381-8940 |
| Hawkins Electric Svc Inc Columbia 21044 | (410) 715-9300 |
| Horizon Electrical 9151 Red Branch Rd, Columbia 21045 | (410) 964-2250 |
| Howard County Electric Inc 9693 Gerwig Ln # T, Columbia 21046 | (410) 290-9888 |
| Liberty Electrical Contractors 5221 Paul Revere Ride, Columbia 21044 | (410) 720-0309 |
| M L Smith Electric Inc 9375 Gerwig Ln, Columbia 21046 | (410) 381-4477 |
| Nelcorp 9693 Gerwig Ln # 1s, Columbia 21046 | (410) 290-5758 |
| Suburban Electrical Svc 9126 Lambskin Ln, Columbia 21045 | (410) 992-0189 |
| William H Affeldt Elec Contrs 10841 Harmel Dr, Columbia 21044 | (410) 997-4600 |
| Your Electric Svc 5231 W Running Brook Rd, Columbia 21044 | (410) 730-6505 |