Coast Energy Solution in College Area operates from 6602 El Cajon Boulevard in San Diego's 92115 ZIP as a multi-trade contractor holding three active CSLB licenses: #881254 and #1095139 for general building and #1073261 for C-39 roofing. Established in 2010, the company combines solar panel installation, roofing, kitchen and bathroom remodeling, window replacement, and exterior coating under a single general-contracting umbrella, allowing homeowners to bundle energy-efficiency upgrades with structural improvements on one permit and one contract. Solar installations follow California's net energy metering framework, with system sizing based on historical SDG&E usage data, roof orientation, and available south- or west-facing surface area, and the company handles structural engineering calculations, utility interconnection applications, and city permit submittal through San Diego Development Services. The El Cajon Boulevard location sits on the main commercial corridor through College Area, less than a mile from SDSU, in a stretch of mixed commercial and residential properties where 1960s-era stucco buildings and postwar bungalows are the primary candidates for energy-retrofit work. Electrical panel upgrades and service-entrance rewiring are handled through coordination with SRP Electric Inc. in Grantville, whose C-10 electrical license covers the panel and inverter connections that solar installations require when existing service falls below the amperage threshold for grid-tie systems. Roofing scope includes composition shingle replacement, tile re-roofing, and flat-roof coatings, with solar installations frequently paired with a simultaneous roof replacement to avoid the cost of panel removal and reinstallation when the existing roof is within five years of end-of-life. Kitchen and bathroom remodeling runs from cabinet refacing and countertop replacement to full gut renovations including demolition, plumbing relocation, electrical rough-in, tile, drywall, and paint. Window replacement projects focus on dual-pane low-E retrofits that reduce cooling loads in the inland heat corridor east of the 15 freeway, where summer afternoon temperatures routinely exceed coastal San Diego by 10 to 15 degrees. The company also operates under the name Coast Design & Build for its remodeling division, maintaining separate Yelp and trade profiles for the construction and energy sides of the business. TAG Roofing & Solar in Grantville operates in a similar dual-trade model combining C-39 roofing with solar installation, and both companies draw from the same Grantville-to-College Area corridor for residential projects. Exterior coating and paint services protect stucco and wood siding surfaces that deteriorate under UV exposure in the inland San Diego climate, with elastomeric coatings providing a waterproof membrane layer over hairline stucco cracks.