| Business | Phone |
| Excel Commercial Constructors 1605 Grand Ave # 2, San Marcos 92078 | (760) 744-3273 |
| Falcon General Engineering 445 E Carmel St, San Marcos 92078 | (760) 510-7956 |
| Americon Constructors Inc 1645 S Rancho Santa Fe Rd #201, San Marcos 92078 | (760) 591-0011 |
| Casa Framing Steel Light Gauge 247 Venture St # 101, San Marcos 92078 | (760) 744-9119 |
| Ccl Contracting Inc San Marcos 92078 | (760) 744-9176 |
| Don Hubbard Contracting Co 1015 Linda Vista Dr # A, San Marcos 92078 | (760) 736-3241 |
| Mike Warner Grading 1125 Lake Ridge Dr, San Marcos 92078 | (760) 753-1420 |
| Matrix Engineer 801 Grand Ave, San Marcos 92078 | (760) 736-4396 |
| Logan Engineering 1635 S Rancho Santa Fe Rd, San Marcos 92078 | (760) 510-3152 |
| Hilton Engineering Inc 145 Vallecitos De Oro, San Marcos 92069 | (949) 757-1910 |
| Hms Construction 1225 Linda Vista Dr, San Marcos 92078 | (760) 731-6156 |
| Lantec Engineering Co 145 Vallecitos De Oro # B, San Marcos 92069 | (760) 471-1900 |