Custom builder in Mandarin, Florida

Yes. Mandarin 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. Jacksonville tree removal permits and mitigation requirements shape site plans here more than anywhere else in Duval. We handle the permit applications and the agency coordination as part of every job.

Sand and organic soil under a heavy live-oak canopy that Jacksonville's tree ordinance actively protects. A long stretch of St. Johns River frontage where the river is at its widest — long fetch, real wave energy, and serious dock loads. Both of those shape foundation, drainage and site work decisions here.

Mostly riverfront homes, 1970s-90s subdivisions, wooded acreage lots. Everything from 1970s ranch homes to large riverfront customs, most with mature landscaping worth designing around.

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.