Nilsen General Contracting operates from 7079 Mission Gorge Road, Suite D, in San Diego's Grantville district, holding CSLB #872708 with dual A (General Engineering) and B (General Building) classifications in the 92120 ZIP. Martin Nilsen founded the company in 2004, and it has accumulated 31 building permits across San Diego County covering custom home construction, whole-home remodels, room additions, and outdoor living builds. Kitchen and bathroom remodels are the high-frequency residential scope, often coordinating cabinet layout, countertop fabrication, and fixture specification with Coast Design & Build on College Area and Grantville homes. BuildZoom rates the firm at 105 out of 120 — top 8 percent among California's 336,000-plus contractors — based on permit volume, license standing, insurance verification, and bond status with Wesco Insurance Company. Mission Gorge Road is Grantville's primary commercial corridor, running north from the 8 freeway toward Mission Trails Regional Park, and the Suite D office shares the stretch with auto shops, breweries, and trade contractors that serve San Diego's eastern neighborhoods. Custom home builds run the full design-to-certificate-of-occupancy pipeline: site work, foundation, framing, mechanical/electrical/plumbing rough-in, insulation, drywall, finish carpentry, and final inspection. ADU (accessory dwelling unit) construction has joined the permit mix as San Diego's ADU ordinance drives backyard-unit development across the single-family lots in Allied Gardens, San Carlos, and Del Cerro. Roofing phases on new construction and addition projects pull in Colin's Emergency Roofers for tear-off and resheathing on Grantville projects. The dual A/B license classification allows Nilsen to self-perform site grading, retaining walls, and drainage infrastructure without subcontracting the civil scope that most B-only contractors must outsource.