| Business | Phone |
| Affordable Design & Drafting 260 North Ln, El Cajon 92021 | (619) 442-1288 |
| Beeler Consulting Architects 1943 Friendship Dr # C, El Cajon 92020 | (619) 448-8006 |
| Mannix Architecture 439 El Cajon Blvd, El Cajon 92020 | (619) 588-7730 |
| Kenneth D Smith Arch & Assoc 500 Fesler St, El Cajon 92020 | (619) 444-2182 |