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Tallahassee Foundation

Serving Tallahassee and nearby areas

Ground Sinking Near the House in Tallahassee, FL

A new dip or soft spot in the yard near your home can be a sinkhole, rotting buried debris or a broken pipe, and a free inspection helps you find out which before it reaches the house.

Book a free foundation inspection

Tell us what you are seeing. A local specialist calls you back the same business day.

Local to Tallahassee

We connect property owners in Tallahassee and nearby areas, including Midtown, Killearn, Betton Hills, SouthWood, Lafayette Park and Frenchtown, with one independent local foundation repair specialist.

What it costs

Typical published ranges for Tallahassee. The contractor's written estimate is the price, and the inspection is free.

WorkTypical range
Inspection and written estimate Free
Typical sinkhole repair $10,000 to $20,000
French drain, average total job $2,800 to $6,500
Utility locate before digging Free

See typical foundation repair prices in Tallahassee

What you will notice

A new round dip

In the lawn, often where water now collects after rain.

A soft spot

That sinks when you step on it.

A hole

That opens at the surface, sometimes small at the top and wider below.

Pavers, a patio or a walk

That dips or cracks.

Soil gone

From under the edge of the slab.

Fence posts, trees or a shed

That start to lean.

New cracks

In the house on the same side as the dip.

Why the ground drops in Tallahassee

Limestone under the south side. South of the Cody Escarpment lies the Woodville Karst Plain. A thin layer of sand covers limestone that slowly dissolves in rain water. That leaves gaps in the rock. Sand can wash down into them, and the ground above sinks.

Real sinkholes happen here. In January 2020, a sinkhole opened at a mobile home park on Capital Circle Southwest in Tallahassee. News reports said it forced two families out and split a trailer. Crews filled it with dirt.

Even lakes drain here. Every decade or two, Lake Jackson, north of town, drains into the rock below through a sinkhole called Porter Hole Sink. WFSU reported one of these drain-outs in 2021. It shows how much open rock sits under parts of Leon County.

The state keeps a list, but most are not checked. The Florida Geological Survey keeps a record of reported dips and holes. It says most reports have never been checked in the field, so the cause is not known. A report on the list does not prove a sinkhole, and a missing report does not prove the ground is safe.

Many dips are not sinkholes. The Florida Geological Survey lists other causes that look the same:

Rotting stumps

And buried wood

Buried trash

And building scraps

Broken sewer or drain pipes

Old septic tanks

That were not filled in right

Loose fill soil

That was not packed down

Clay or organic layers

That shrink as they dry out

Rain after drought. The state says sinkholes are most active when heavy rain follows a long dry spell. Heavy loads and big earth-moving jobs can also set them off.

Cosmetic or urgent?

Probably not urgent:

  • A small, shallow dip far from the house that has not changed in months
  • A low spot where an old tree was taken out

Get it checked soon:

  • A dip that is getting deeper or wider
  • A dip within a few yards of the house
  • A dip plus new cracks or sticking doors inside
  • A wet dip that never dries out

Act now:

  • A hole that opens or grows fast
  • Walls on that side that crack, sag or sink
  • Cracking or popping sounds from the house

The state says to stay out of a building if you see sinking, sagging or cracking walls near a hole. If anyone could be hurt, call 911 first.

What the fix usually is

  1. Find the cause. An inspector looks at the house and yard. If it might be a sinkhole, an engineer or geologist may test the ground.
  2. Fix the source. A broken pipe gets repaired. An old tank gets filled. Bad fill gets dug out and replaced.
  3. Fix the ground. For true sinkholes, crews often pump grout into the ground to fill gaps and firm up the soil.
  4. Support the house. If the house moved, piers may go under the part that dropped.
  5. Move water away. Gutters and drains keep rain from washing more soil into the low spot.

What it costs

A filled pipe or a drain fix can cost a few thousand dollars. A true sinkhole repair costs much more. The price table on this page shows typical ranges from published guides, not a quote. Grout jobs are often priced by how much grout goes in, which is not known until the work starts.

Before the inspection

  1. Mark the edge of the dip with stakes and take a photo each day.
  2. Keep kids and pets away, and do not run water into the hole.
  3. Call your insurer if the house shows new damage.
  4. Call 811 before you dig or probe. Sunshine 811 marks buried lines for free.
  5. Report it to the Florida Geological Survey so it goes in the state record.

Get a free inspection

Call (850) 988-3375 or send the short form. A local foundation crew will call you back to set up a free inspection and a written price.

Frequently asked questions

How do I know if the dip in my yard is a sinkhole?

You often cannot tell by looking. The Florida Geological Survey lists rotting stumps, buried trash, broken sewer or drain pipes, broken septic tanks and poorly packed soil as things that can look like a sinkhole. Testing by an engineer or geologist is the only sure way.

Should I fill the hole myself?

The state says small holes can be filled with clean sand or soil, and not to put water into a hole because it can make it grow. If the hole is near the house, have it looked at first so you do not hide the cause.

Who do I call about a sinkhole in Florida?

If anyone is in danger, call 911. If it affects your house, call your insurance company. The Florida Geological Survey says no state agency inspects sinkholes on private property, but it does take reports and has a helpline with a licensed geologist.

Does home insurance cover sinkholes in Florida?

Every Florida property policy must cover a catastrophic ground collapse that gets the home condemned. Wider sinkhole coverage is something insurers must offer for an extra cost. Check your policy.

Can a broken pipe make the ground sink?

Yes. A leaking water, sewer or drain line can wash soil away under the yard or the slab. A dip that stays wet, or a high water bill, points to a leak.

Do sinkholes happen in Tallahassee?

Yes. In January 2020, a large sinkhole opened at a mobile home park on Capital Circle Southwest and forced families out of their homes, local news reported.

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