California DRE #02135471 places John Bertsch at Coldwell Banker West on Fort Stockton Drive in Mission Hills, where brokerage runs parallel to his San Diego property development portfolio. Before brokering, Bertsch built the Cairo Condominiums in Hillcrest and two custom homes on Mission Hills lots, and his referral bench for ADU-eligible buyers runs directly to Millan Construction | ADU & Remodeling for permit-ready scope estimates. He is also the developer behind Meshuggah Shack, the Mission Hills coffee bar built inside a converted ATM hut at Washington and Goldfinch. LGBTQ+ community advocacy dating to 1982 and San Diego Equality Business Association membership shape a client book weighted toward first-time and relocating LGBTQ+ buyers. Pre-listing due diligence on older Mission Hills stock, where 1920s Craftsman substructures and unventilated crawlspaces are recurring problems, routes through SD Mold Inspection. The longest files remain developer-side lot-split and small condo-conversion deals where entitlement, architectural approval, and buyer pre-sales all converge on one timeline.