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Basement Waterproofing Cost in Tampa [2025 Data]
Normal Range: $11,750 - $22,000
Basement waterproofing in Tampa, FL, costs $16,142, on average, and most homeowners pay somewhere between $11,750 and $22,000 for a complete waterproofing system.
How we get this data
Iriana Shiyan / Adobe Stock Photography
Iriana Shiyan / Adobe Stock Photography
Cost Insights
Tampa's cost for basement waterproofing is higher than the national average.
The city's low water table, low elevation, and wet climate make basements extremely vulnerable to flooding and water damage.
In general, major waterproofing efforts that include sump pumps and drainage are often recommended to counteract flood risks for Tampa homes.
With basement waterproofing costs in Tampa averaging $16,142, homeowners will notice that the city's high water table, low elevation, and wet climate bring costs higher than average. Overall, Tampa homeowners might pay between $11,750 and $22,000 for different types of waterproofing options. Factors influencing the total cost of basement waterproofing at Tampa homes include the size of the home and your decision to use interior or exterior waterproofing. Keep reading to learn more about this project's budget.
Basement Waterproofing Cost Factors
When basement waterproofing contractors in Tampa assess homes, they look at factors like a property's slope, potential points of entry for water, and existing signs of basement water damage to help you avoid the potential for water damage restoration costs down the road. Your input and preferences regarding waterproofing strategy and budget will also be used.
Basement Size
The cost to waterproof a basement falls between $3 and $10 per square foot on average, although where in this range your pricing falls depends largely on the type of waterproofing method you choose. Prices in Tampa are generally higher, between $5 and $15 per square foot. In any case, large spaces require more time, labor, and material to waterproof than small spaces. Therefore, the larger your basement, the more you can expect to pay for waterproofing for any given method.
Below is a breakdown of how much you might spend for a range of basement sizes.
| Basement Size (Sq. Ft.) | Average Cost Range |
|---|---|
| 300 | $1,500–$4,500 |
| 500 | $2,500–$7,500 |
| 700 | $3,500–$10,500 |
| 900 | $4,500–$13,500 |
| 1,000 | $5,000–$15,000 |
| 1,200 | $6,000–$18,000 |
| 1,500 | $7,500–$22,500 |
| 1,700 | $8,500–$25,500 |
| 2,000 | $10,000–$30,000 |
Interior vs. Exterior Waterproofing
Depending on where your basement water issues are stemming from and what solutions your expert recommends, you may need either interior or exterior waterproofing services. Some homes require both. Interior basement waterproofing is often more affordable because it doesn’t involve excavation and backfilling. Something like installing damp-proofing around the exterior of your foundation would require a lot of digging, which drastically increases labor costs.
You’ll spend an average of $3,000 on interior waterproofing services, while extensive exterior services will cost an average of $7,000.
Waterproofing Method
As mentioned above, professionals can waterproof your basement from the exterior or the interior. Exterior methods are more effective because they’re preventative, but they’re also more expensive because they tend to require excavation, which is time-consuming. The table below includes a list of basement waterproofing methods along with cost ranges for each.
| Waterproofing Method | Interior or Exterior | Average Cost Range |
|---|---|---|
| Sump pump | Interior | $1,000–$1,600 |
| Dehumidifiers | Interior | $700–$1,100 each |
| Vapor barriers | Interior | $950–$3,000 |
| Weeping tiles / French drain | Exterior / Interior | $80–$110 per square foot |
| Baseboard channels | Interior | $25–$55 per linear foot |
| Yard grading | Exterior | $325–$2,100 |
| Underground downspout | Exterior | $225–$1,900 |
| Gutter system | Exterior | $4–$38 per linear foot |
| Liquid membrane | Exterior | $2–$7 per square foot |
Basement Waterproofing Pro Costs
When hiring pros for basement waterproofing in Tampa, your quotes will come back based on project scope. For contractors, costs for certification and operation are added to charges. In addition, all taxes on materials and permit fees are added to project totals.
Permits
Permits generally aren't needed for adding waterproof membranes or sealants to Tampa basements. However, you should expect to be charged a permit fee for any waterproofing work that involves excavating or installing drains. For example, adding a sump pump to a Florida basement can require plumbing and electrical permits that cost $120 each.
Local Labor
On average, basement waterproofing professionals in Tampa charge between $175 and $200 hourly.
Taxes
All materials that your contractor sources for basement waterproofing in Tampa are subject to local sales taxes. While there's no Tampa city-level tax, residents do pay a 6% Florida sales tax and 1.5% Hillsborough County sales tax for a combined rate of 7.5%.
Insurance
Florida law requires contractors with employees to carry mandatory workers' compensation insurance and surety bonding. It's also common for contractors to carry general liability insurance. In total, insurance costs can add $100 to $350 to the cost of doing business monthly for local contractors in Tampa.
Licensing Certification
A Florida contractor license is generally needed for any significant construction, structural alterations, or services that involve plumbing. The cost for pre-licensing education, state exams, and application fees can total around $1,000. Renewal fees are around $200.
Does Basement Waterproofing Increase Home Value?
Is basement waterproofing worth it for Tampa homeowners? Yes, basement waterproofing can be a big selling point for Tampa homes. Locals may be aware of worries that Tampa is effectively "sinking" faster than sea levels are rising. A low water table and low elevation, combined with frequent storms, can put Tampa homes at risk for flooding and water damage. Basement waterproofing provides peace of mind for current owners while increasing a home's value for potential future buyers.
How Angi Gets Its Cost Data
Home is the most important place on earth, which is why Angi has helped more than 150 million homeowners transform their houses into homes they adore. To help homeowners with their next project, Angi provides readers with the most accurate cost data and upholds strict editorial standards. We extensively research project costs to develop the pricing data you see, so you can make the best decisions for you and your home. We rely on reputable sources, including the U.S. Bureau of Labor Statistics, academic journals, market studies, and interviews with industry experts—all to ensure our prices reflect real-world projects.
Want to help us improve our cost data? Send us a recent project quote to [email protected]. Quotes and personal information will not be shared publicly.
The homeowners guide to basement waterproofing services
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