DM Hultenius Corporation is a design-build firm in Grantville handling custom homes, kitchen remodels, and whole-house renovations across San Diego County under CSLB License #386454 (General Building). David Hultenius started in the local building trades through the San Diego Carpenter's Union in the early 1970s and founded the corporation as a custom-home builder. His son Derek Hultenius joined the firm in 2000 after completing his first custom home at age 20 and now serves as president. Interior designers at firms including Vivo Design Studios have coordinated finish selections alongside the Hultenius team's in-house 3D rendering walkthroughs on joint remodeling projects. Permit records show 73 completed projects, with recent work including a 1,200-square-foot detached ADU conversion and a 960-square-foot second-floor addition in Rancho Santa Fe. A BuildZoom score of 113 ranks the firm in the top three percent of California's 336,000-plus contractors. Typical kitchen builds spec quartz countertops with custom-raised walnut bar sections and cabinet finishes from specialty spray shops in the East County corridor. Electrical and low-voltage subcontract work routes through SRP Electric Inc. on Grantville's Mission Gorge commercial strip, keeping general-to-sub coordination within a tight geographic radius. The Alvarado Canyon Road office in the 92120 ZIP sits less than a mile from the Grantville Trolley Station and two miles south of Mission Trails Regional Park, centering the service radius across mid-city neighborhoods where post-war housing stock drives steady renovation demand.