Custom builder in San Mateo, Florida

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

Putnam County Building Department. County permitting with wetland delineation common before a site plan is approved. We handle the permit applications and the agency coordination as part of every job.

Sand ridge over clay with swamp margins to the east — buildable ground is a narrower band than the parcel lines suggest. Swamp drainage on one side and river access on the other, with a seasonal water table that moves several feet. Both of those shape foundation, drainage and site work decisions here.

Mostly rural homesites, riverfront parcels, barns and shops. Older rural homes on acreage, many with outbuildings that have outlived their original purpose.

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.