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How Much Does It Cost To Inspect Waterproofing?

Typical Range: $3,367 - $11,791

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The national average cost for a waterproofing inspection is $400, with a typical range between $300 and $500.

Water seepage is a common but significant problem in basements. While a small leak may seem pretty harmless, long-term it can cause major damage to your property's foundation. So if you suspect a leak or are moving into a new property, waterproofing inspections are vital to ensure the basement is free of leaks and water seepage.

On This Page:

  1. Waterproof Inspection Cost Calculator
  2. Waterproof Inspection Costs
  3. Waterproof Inspection Cost Factors
  4. Warning Signs of Water Damage in the Basement
  5. What Happens During a Waterproofing Inspection?
  6. What Happens After a Waterproofing Inspection?

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National Average $7,576
Typical Range $3,367 - $11,791
Low End - High End $450 - $18,844

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Cost data is based on actual project costs as reported by 2,382 HomeAdvisor members in .

Waterproof Inspection Costs

What you're really paying for when you hire a local waterproofing inspector is the expert's time. To do the job properly, the waterproofing inspector has to check the interior and the exterior of your property, and this is a time-consuming business. Paying $300 to $500 might seem costly for an inspection, but compared to the cost of the damage caused by undetected leaks, it’s reasonably inexpensive.

Over time, moisture can cause significant structural damage that can cost tens of thousands of dollars to remedy. A $400 inspection and a little remedial work for another few hundred is far more affordable.

Waterproof Inspection Cost Factors

Waterproofing inspection costs vary based on the size of your property and ease of access. If you have a large, sprawling property and half of the exterior walls are overgrown and difficult to get to, you'll pay more for the inspection than if you have a modest, well-kept property with easily accessible walls and basement access.

DIY vs. Professional Waterproofing Inspection

Because the potential for costly and significant damage is so high if you miss signs of water incursion, this is not a DIY job. Yes, there are preventative measures you can take yourself to limit the risk of water damage in the basement, but the actual inspection should be left to a professional.

What Are the Warning Signs of Water Damage in the Basement?

Signs of moisture problems in the basement include water seeping or bleeding through the walls in corners and areas where two walls meet or where the floor meets the wall. You may also notice peeling paint or bubbled paint, and if you touch one of these bubbles you'll most likely notice there's water inside it.

Also, look outside your home, as this is where most water leak problems start. If you've got standing water close to the foundation long after the last rainfall, you'll need help because, over time, this water causes damage and forces its way through your basement walls.

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What Happens During a Waterproofing Inspection?

The inspector checks inside and outside your property, looking at numerous key points.

Exterior Ground Slope

One key thing a pro will check is whether the ground around your home is appropriately sloped and graded. It should have a gentle downward gradient, sloping down and away from the building's foundation. This directs rain away from your property. If the ground slopes towards your house, the water runs toward the base of your walls and has nowhere to go but in.


Another key inspection point is whether you have enough guttering and if the gutters are in good condition and free of obstructions. If your gutters are overflowing or clogged, water will run over the side and all the way down the walls of your house when it rains—and a small portion will undoubtedly seep into the bricks at the bottom. Over time, this adds up to a significant amount of moisture.

Adequate Downspouts

Even if your gutters are clean and you've got a nice downward slope to your yard, it's important that your downspouts send water far enough away from your property that it can't run back again. The waterproofing inspector will advise whether you need downpipe extensions to make sure water can't travel backward to your home.

Interior Damage

Once the pro has finished the exterior examination, they'll move into the basement and check for a number of telltale signs:

  • Efflorescence (visible white powdery patches on porous surfaces like brick caused by salt crystals from water)
  • Cracked walls
  • Rotting wood
  • Sagging floors
  • Damp patches on the walls or ceiling
  • Rising damp
  • Rust stains
  • Mold
  • Bubbling or peeling paint

What Happens After a Waterproofing Inspection?

After a waterproofing inspection, your pro may tell you there's evidence of water damage and recommend some remedial work. Among the most common are:


How important is a waterproofing inspection?

A waterproofing inspection is vital if you're moving into a new property or you suspect you have a leak. If you fail to take action, you could end up with serious damage and a bill of over $13,000 for the cost of repairing your foundation.

How can I prevent water damage in my basement?

Perform regular visual inspections of the basement yourself to look for early signs of minor leakage. Regularly inspect and clean your gutters, too, to make sure there's no blockage so water doesn't flood down your exterior walls and work into the basement.

Make sure the ground slopes gently away from your home and look out for areas where water pools long after rainfall, as these areas need to be resloped.

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