Custom builder in San Marco, Florida

Yes. San Marco is inside our regular working area from Keystone Heights — we cover all of Duval County and the 6 neighboring counties we serve. Call (352) 478-6112 and we'll come walk the property.

City of Jacksonville Building Inspection Division. City floodplain rules that trigger substantial-improvement review once a renovation passes a value threshold. We handle the permit applications and the agency coordination as part of every job.

Low-lying ground behind the river bulkhead where tidal flooding on Hendricks and the surrounding streets is a known, recurring condition. The river is close and high — finished-floor elevation and backflow protection are live design issues, not paperwork. Both of those shape foundation, drainage and site work decisions here.

Mostly 1920s brick and stucco homes, riverfront property, small commercial buildings. Compact 1920s masonry houses on small lots, where additions have to go up or back rather than sideways.

Yes — Keystone Custom Builders holds Florida Certified Building Contractor licence CBC1265492, which covers residential and light commercial construction statewide, and we carry general liability and workers' compensation coverage.