AB Construction & Engineering holds CSLB License #1079087 with Class A General Engineering and Class B General Building classifications, operating from La Mesa Boulevard in the 91942 ZIP. The firm handles full-cycle construction from architectural design and city permitting through foundation work and finish carpentry, a vertical integration that includes the HVAC rough-in and commissioning subcontracted to mechanical firms like Jackson & Foster Heating and Air Conditioning. ADU construction is a core specialty, with detached accessory dwelling units exceeding 1,200 square feet designed, permitted, and built within six-month timelines under San Diego County's current ADU ordinance. Site preparation for new construction and additions often requires driveway and walkway demolition and replacement, tying structural work into the asphalt and concrete scope delivered by La Mesa Diamond Asphalt. Highest-scope projects involve ground-up custom residential construction requiring structural engineering calculations, Title 24 energy-compliance documentation, and multi-trade coordination across framing, electrical, plumbing, and mechanical divisions.