DesginBuild Solutions on College Avenue in College Area operates as the design-build division of Jon Krause Contractor in San Diego, holding dual CSLB licenses: #444812 for General Building and #842098 for General Engineering. Owner Mikel Krause runs project estimation and client coordination from the 92115 office south of SDSU. Roofing tie-ins on addition projects coordinate with Colin's Emergency Roofers for flashing integration and load-rated sheathing where new framing meets existing roof planes. The firm's General Engineering classification opens scope beyond standard residential remodels to include grading, site work, and structural concrete — a combination that positions the company for ADU foundation pours and hillside retention projects on the College Area's sloped lots. Residential work encompasses room additions, kitchen and bathroom gut-renovations, and second-story builds on the single-story ranch homes between College Avenue and Montezuma Road. The Blue Book has listed the parent Jon Krause Contractor operation since 2011, and permit history shows work ranging from 325-square-foot family room additions to multi-phase commercial tenant improvements. Window and door replacements on remodel projects pull from Newman Windows and Doors in Grantville, keeping lead times short on energy-rated retrofit units specified under California Title 24 requirements. El Cajon Boulevard and the SDSU campus are both within a mile of the office, placing the firm at the center of College Area's ongoing residential reinvestment cycle.