Waterproofing your home can increase its value, but the amount by which it increases can vary depending on various factors such as the location, the extent of waterproofing, and the local real estate market conditions.

In general, waterproofing is an important maintenance measure that can prevent water damage and mould growth, which can lead to costly repairs and health hazards. By waterproofing your home, you can protect its structural integrity and enhance its longevity, which can be attractive to potential buyers.

However, the increase in value will likely depend on the extent of waterproofing and the local real estate market conditions. For instance, if your home is located in an area with a high risk of flooding or water damage, the value of your home may increase significantly if it is fully waterproofed around the perimeter. On the other hand, if your home is located in an area with a low risk of water damage, the increase in value may not be as significant.

Overall, while waterproofing can increase the value of your home, it's difficult to estimate by how much without more information about your specific situation. It's best to consult with a local real estate agent or appraiser to get a more accurate estimate.