Much of Gainesville sits on about five feet of sand over clay-rich soil, with limestone below that water slowly dissolves. Heavy summer storms soak the sand and wash it down into gaps in the rock. That is why the county sees sinkholes and settling under both old homes near downtown and newer slab homes on the west side.
What it costs
Typical published ranges for Gainesville. The contractor's written estimate is the price, and the inspection is free.
Gainesville gets about 48 inches of rain in a normal year, the National Weather Service says. The wettest stretch runs from June to September. Summer storms can drop a lot of rain in an hour.
Where that water goes matters. Rain that runs off the roof and pools by one wall soaks the sand under that side of the house. Sand can wash away or pack down. The clay layer below can hold water there. Then that part of the house sinks, and the rest does not.
Alachua County names roof, gutter and pavement runoff as a cause of sinking soil. It also says soil sinking is common in very wet spells, most of all after dry ones.
Signs of a drainage problem
Water standing by the house after a storm.
Gutters that overflow or downspouts that dump at the wall.
Soil or mulch washing away from one side of the house.
A yard that slopes toward the house instead of away.
Stains or mildew low on the outside walls.
A damp crawl space in an older home.
New cracks after a very wet month.
How a local crew fixes it
Gutters and downspouts
Clean, right-sized gutters with downspouts that carry water away are the first fix. Extensions or buried pipes can move water well past the house.
Regrading
The crew reshapes the soil so it slopes away from the house. This sends rain away instead of toward the walls.
French drains
A French drain is a trench with gravel and a pipe with holes. It catches water and carries it away from the house. It helps where water sits on the clay layer under the sand.
Swales
A swale is a wide, shallow dip in the yard that guides water around the house. It works well on larger lots.
Sprinkler and leak fixes
Sprinklers that spray the wall and leaking hose bibs keep one side wet. Small fixes here can save the foundation.
Where the water goes matters here
In Gainesville, water that leaves your yard still has to go somewhere. The county says pond building and moving storm water have made sinkholes more common. A good drainage plan spreads water out or sends it to a safe spot. It does not pour it all into one hole.
Never drain water into a sinkhole or a low spot that keeps sinking. The Florida Geological Survey warns that water can make a sinkhole grow. See sinkhole repair if your yard has one.
What a drainage check covers
A good drainage check is more than a look at the gutters. Expect the crew to do these things.
Walk the whole house and mark where water stands after rain.
Check each gutter and downspout, and where each one empties.
Measure how the ground slopes next to each wall.
Look for low spots, soft ground or holes in the yard.
Check sprinklers, hose bibs and pool lines near the house.
Look in the crawl space, if there is one, for standing water.
Check the walls inside for cracks that line up with wet spots outside.
You should get a plan that shows where water goes today and where it will go after the fix.
Older homes and newer homes
Water hurts both kinds of Gainesville homes, but in different ways.
Older homes with a crawl space. Many older homes near downtown sit on piers. When water runs under the house, the crawl space stays damp. Wood rots faster, and piers on wet sand can sink. Keeping water out of the crawl space is the main goal.
Newer slab homes. On a slab, water that pools at one wall softens the sand under that edge. That edge can drop while the rest of the slab stays put. Tile cracks and sticking doors often follow. Moving water away from the slab edge is the main goal.
Homes with pools. A pool deck can tilt water toward the house. A cracked pool can leak into the ground. The county lists cracked pools as a cause of sinking soil, so the crew should check the pool area too.
About these prices
The cost guides above show typical ranges, not a quote. Gutter fixes cost the least. French drains and regrading cost more but can save a much bigger repair. See the full cost guide for more.
Questions to ask about drainage work
Where will the water go once it leaves my house?
Do I need drainage only, or piers too?
Will the plan keep water away from the slab or crawl space?
Does the price include sod, mulch or cleanup?
Does the job need a permit?
Frequently asked questions
Can bad drainage really damage a foundation?
Yes. The county lists runoff from roofs, gutters and pavement as a cause of sinking soil. Water that pools at one side of a house can soften or wash out the sand under it.
Is drainage work enough, or do I also need piers?
It depends. If the house already sank, it may need piers too. Drainage keeps the problem from coming back. Many jobs do both.
Where should my downspouts drain?
Several feet away from the house, onto ground that slopes away. A downspout that dumps right at the wall is one of the most common problems a crew finds.
Will a French drain work in sandy Gainesville soil?
Often yes. Sand drains fast, but water can stack up on the clay layer below. A French drain gives it a path away from the house. The crew should check where the water will end up.
Can I send roof water into a sinkhole in my yard?
No. The county says sinkholes connect straight to our drinking water. The state also warns that adding water can make a sinkhole bigger.
What can I do myself today?
Clean gutters, add downspout extensions and turn sprinklers away from the walls. Keep soil or mulch sloping away from the house.
Book your free drainage check
The next big storm will show you where the water goes. Let a local crew show you first. Call (352) 724-7728 or send the short form for a free inspection and a written price.