Boynton Beach, Florida: what the ground under the city is like
Boynton Beach sits in Palm Beach County, on florida karst and sand. The soil mapped here is predominantly classified somewhat excessively drained — and that classification, not the rainfall total, is what decides how a slab foundation behaves.
Linear extensibility 1.7% — low.
34% of the mapped soil area around Boynton Beach is wet enough that the USDA describes it as needing artificial drainage.
Shallowest annual water table around 35 cm (1.1 ft).
Values are for Palm Beach County, which is what the soil survey resolves to. Full county report · soil map for a specific address.
The ground under Boynton Beach
Florida karst and sand. Quartz sand over limestone, active karst, water table often within a metre
Two contradictory facts at once: sand that drains almost instantly, and a water table so shallow that it reaches the surface in the wet season. Volume change is negligible. The real hazard is karst — sinkhole activity is a recognised, insurable peril in much of the state, unlike almost anywhere else.
When it shows up here
| Slab moisture | Jan | Feb | Mar | Apr | May | Jun | Jul | Aug | Sep | Oct | Nov | Dec |
|---|---|---|---|---|---|---|---|---|---|---|---|---|
| Ground movement | Jan | Feb | Mar | Apr | May | Jun | Jul | Aug | Sep | Oct | Nov | Dec |
Water peaks from August to October with the tropical season, when a single storm can deliver a season’s rain in two days. The spring dry spell is when clay movement shows up.
Climate pattern for this physiographic region, not a forecast for your house and not from the soil survey. It answers a question homeowners actually ask: when does this show up.
What repairs cost in Florida
| Reference job | Modelled range |
|---|---|
| Slab foundation lifted and stabilised on 12 piers | $17,100–$36,500 |
| Two slab cracks injected + regrading around the perimeter | $1,900–$6,350 |
| Engineer's report plus buried downspout discharge | $1,250–$4,200 |
Regional factor for FL: ×0.95. Full cost breakdown for Florida · run your own dimensions.
ZIP codes in Boynton Beach
33424, 33425, 33426, 33435, 33436, 33437, 33472, 33473, 33474
Soil does not stop at a city boundary, and neither does this data — every ZIP code above resolves to the same county soil survey. For the individual survey polygons around one address, use the soil map.
Other places in Palm Beach County
Questions about Boynton Beach
Is the soil the same everywhere in Boynton Beach?
No. These values describe Palm Beach County as a whole, which is the unit the soil survey publishes. Within a city, map units change over a few hundred metres — the soil map draws the actual polygons around a point and is the honest answer for one address.
Which contractor should I call in Boynton Beach?
We do not rank or recommend individual firms and we are not one. What this page is for is knowing which kind of work the ground here points to before anyone quotes you, and which claim to check. If you want quotes, the form below passes your request to the named networks.
Does this replace an inspection?
No. It tells you what the ground is; an inspection tells you what your building is doing on it. The useful order is: read this, print the brief for your county, then have someone look.
Get quotes in Boynton Beach
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