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How Much Does it Cost to Seal a Basement or Foundation?

Seal a Basement or Foundation Costs
Average reported costs
$3,876
based on 2,349 cost profiles
Most homeowners
spent between
$2,034 - $5,914
Low cost
$600
High cost
$9,994
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A flood or slow leak in your basement signifies a problem outside your home. You need to stop the water before it comes too far in. The best way to do this is to seal the foundation.
The average homeowner spends around $3,800 to seal a basement or foundation, with minor repairs costing as little as $750. More comprehensive issues that include fixing cracks in the foundation or adding drains & gutters can cost upwards of $9,000.

Gutter Installation

If you do not have gutters, this contributes to why water is seeping into your foundation or basement. Before sealing, it is important to install gutters to prevent water from flowing too close in the future. Adding gutters to your home will certainly add to the cost of this project, but it is very important.

Cracks in the Foundation

Before sealing the foundation or basement floor check for any cracks or crumbling. These will need to be repaired before the sealing takes place. This will also add to the cost, but it is essential. No matter how well you seal and waterproof, it will make no difference if there are large cracks allowing the water to run in. If you see a crack, you may need to dig below the surface of the home to find how long and deep the crack runs before repairing it

Sealant Types

There are many different types of waterproofing paints and sealants available for foundation and basement floors. Which you choose will affect the price of your sealing project. In this case you do get what you pay for, so talk to a professional about which products they recommend for your home.

Exterior Waterproofing

For new construction, the most expensive but most effective method for stopping flooding before it even starts are liquid rubber waterproofing membranes. These are rolled on in a liquid state on the outside of your home and then harden to a sealed rubberized finish. This method is highly effective but can only work on a new construction as it is applied when the foundation is fully exposed.
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James McMillan More than 1 year ago
I looking to get waterproofing applied to an exterior wall. The area needs to dug-out and the material applied to the lower wall on a raised ranched house. What would be the estimated cost for such a project?
Eilen Mando More than 1 year ago
I got a next day free estimate ,, hopefully the original price he gave me $340 will stay 
Asha Thomas 12 months ago
Given an offer for buying a house with basement leakage in heavy rains but now worried about this. Any advice / suggestions before we sign the contract.
Erin Kesler More than 1 year ago
Great to know the low and high ends of pricing. Definitely helps prepare me for what is to come.
Eugene Ortloff More than 1 year ago
Unable to take on this project at this time
Denise Safford More than 1 year ago
Cannot afford at this time:( Thanks
Elizabeth Kikuchi More than 1 year ago
My company charges $14,000.  They do not provide follow up maintenance either.  They are seling a crawl space and installing a dehumidifier and a sump pump!  This is very high???
april kitzinger More than 1 year ago
what company

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