Catlin General Contracting in Grantville is a foundation repair and concrete specialist operating from 4580 Alvarado Canyon Rd in San Diego, near the intersection with Mission Gorge Place. Owner Kevin Aplin holds CSLB license #889333 and has run the company for more than 40 years, building a track record concentrated on residential foundation stabilization, cracked slab repair, and structural concrete work across San Diego County. Foundation underpinning, mudjacking, and pier installation are core services, and the company's engineering background informs the design-build approach, with site-specific load calculations driving the repair methodology rather than a one-size template. Foundation work frequently intersects with plumbing when sewer laterals or water supply lines run beneath or through the slab, and American Plumbing Group in Grantville handles the pipe rerouting and lateral replacements that arise during concrete cutting and slab demolition. French drain installation is a second major division, and Catlin designs drainage systems to redirect subsurface water away from foundation footings, a common requirement in Grantville's clay-heavy soil profile where seasonal moisture shifts put lateral pressure on post-tension and conventional slab foundations. The 92120 ZIP's housing stock includes mid-century homes in the adjacent Allied Gardens and Del Cerro neighborhoods, many of which sit on hillside lots with sloped grading that accelerates water intrusion toward foundation walls. Alvarado Canyon Road runs through Grantville's light-industrial corridor south of the Interstate 8 interchange, and Mission San Diego de Alcala sits less than half a mile north on Mission Gorge Road. Beyond foundation work, Catlin takes on kitchen remodeling, casita conversions, and general residential construction, giving the company a full-scope general contracting capability when a foundation project expands into a broader renovation. Roof structure assessment is part of the foundation evaluation process for homes where differential settlement has shifted load paths, and roofing contractors in the corridor, including Colin's Emergency Roofers in Grantville, address the above-grade structural corrections that follow below-grade stabilization. Catlin's project documentation includes detailed scoping contracts with line-item breakdowns, and the company provides free on-site evaluations before issuing a bid.