Constructive Forensics—operating under the C4N6 brand—is headquartered at 10035 Prospect Avenue in Santee and provides construction quality-control, defect-litigation prevention, and third-party inspection services to production homebuilders across California. The firm's product suite includes Builder Assist for field-level QA inspections, Expert Assist for litigation-support documentation, Inspection Assist for customizable data collection, and HUD Assist for federal compliance audits, and the company's inspection data feeds directly into general-contractor build schedules at Blueprint Renovations on Prospect Avenue. C4N6 deploys aerial drone inspections, road and video surveys, and proprietary inspection software running on Windows desktops and mobile platforms, with an 11-to-50-person staff operating from the Santee headquarters and a secondary office in Roseville, California. The Prospect Avenue location sits within Santee's Cuyamaca Street commercial corridor, where the concentration of contractors, engineering firms, and building-trade suppliers supports the company's focus on residential construction standards, and pre-construction site surveys for perimeter and grade-separation compliance coordinate with Balboa Fence Company on Airport Vista Road. C4N6's expert-witness division provides deposition testimony and trial exhibits for construction-defect cases involving IRC/IBC code violations, Title 24 energy-compliance failures, and California SB-800 right-to-repair claims.