Artificial turf in Hibernia, FL, where the sand suits a green with real contour.

Let the available room serve the shots you want.

A larger yard can allow several putting approaches and a chipping position without converting every open space. Decide how you will reach the green from the house and keep ordinary property access around it. Contours should be chosen for practice rather than assumed from the existing slope.

Keep the setting in the plan.

Mark the tree canopy and obtain any required arborist advice before proposing work beneath it. Near the St. Johns, bring shoreline and drainage information and show any low areas or existing retaining structures.

Hibernia is in unincorporated Clay County. Confirm applicable county and property requirements; an absence of a town government does not establish that no review is needed. Ask for any unresolved drainage or ground work to be separate from the turf installation price.

Blanton sand: deep, clean and well drained.

USDA mapping at the heart of Hibernia returns Blanton fine sand on 0 to 5 percent slopes, rated well drained and in hydrologic group A, with no flooding or ponding and the water table no closer than about 165 centimetres, some 5.4 feet (USDA). The deep sand sits over a loamy subsoil more than four feet down.

That's ground a golf architect would ask for. Digging is easy, water genuinely percolates, and a compacted, open-graded base stays stable, which is what lets a green carry real undulation, tiered shelves and a fringe collar instead of lying flat on the lawn.

Hibernia has no course of its own, but The Golf Club at Fleming Island on Town Center Boulevard, with its driving range, is about 1.2 miles from the St. Margaret's site, and Eagle Harbor Golf Club is about 3.5 miles north. So a backyard putting green here can be the full thing: tiers, a fringe collar, a chipping approach from the lawn and cups set where the break gets interesting.

The river bluff is the exception. Parcels dropping toward the St. Johns have real grade, so retaining and edge detail matter there, and the old plantation frontage carries live oak, magnolia and cypress canopy dense enough that grass won't hold under it. Just south, Black Creek and Peters Creek meet at Camp Chowenwaw Park.

On the river side, your flood zone decides whether a permit comes first.

Find the zone before the layout is fixed. FEMA reads the St. Johns at 4.1 feet NAVD 88 for the 1-percent-annual-chance flood, both at Orange Park to the north and at the Shands Bridge to the south, the two points FEMA reports either side of Hibernia, and it treats this reach as a large lake with tidal effects rather than a flowing river (Clay County Flood Insurance Study, effective 17 March 2014). That elevation is the base flood. Where your ground sits against it is what puts a parcel in or out of the mapped hazard area, and the county's map is what settles it.

It matters because the dirt work counts. Clay County Ordinance 87-45 requires all development inside a Special Flood Hazard Area to get a permit before work begins, and the county's definition of development takes in filling, grading, paving, excavations and any other land disturbing operations (Clay County). Stripping sod and cutting in a base for a green is all of that. In Zone X, flood permits are not required for development at all, so the zone, not the size of the green, decides whether paperwork comes first.

The river spares you the hard version. No floodway was computed for the St. Johns, because at two miles wide it resembles a lake more than a river, so a lot fronting it avoids the engineer-sealed No-Rise study that work in a floodway needs. Send your address to the county's floodplain team at floodteam@claycountygov.com and ask for your zone and what a landscaping-only job needs. Ask now rather than later: FEMA is redrawing the 2014 maps and the replacements are expected to take effect in spring 2027 (Clay County).

On Hibernia Road, there's often nobody to ask.

Hibernia is unincorporated, with no town government or review board of its own, and nothing in the Clay County code prohibits artificial turf (Clay County code). Only two overlay areas bring homes under the county's landscaping requirements, and Hibernia sits outside both.

The gatekeepers here are private covenants. The master-planned Fleming Island communities, Eagle Harbor, Fleming Island Plantation and Pace Island, carry HOAs, while the historic Hibernia Road and river-frontage parcels are largely unplatted and covenant-free. On Hibernia Road or the river side of US 17 you very likely have no covenant to satisfy; inside Eagle Harbor or the Plantation, read yours before any design work.