| Business | Phone |
| Austin & Assoc 1622 Pioneer Way, El Cajon 92020 | (619) 440-3624 |
| Carl Linden Design 1614 Pioneer Way, El Cajon 92020 | (619) 444-6300 |
| Caywood Designs 1017 El Cajon Blvd # D, El Cajon 92020 | (619) 579-9335 |
| Design Associates 1646 Pioneer Way, El Cajon 92020 | (619) 440-3623 |
| Eady & Assoc 1506 Pioneer Way, El Cajon 92020 | (619) 579-6003 |
| Advanced Design & Drafting 1831 Jasmine St, El Cajon 92021 | (619) 448-7582 |
| Marion Smith 12208 Royal Rd, El Cajon 92021 | (619) 443-2220 |