Most subsidence claims are subject to a £1,000 excess payment, the research states.
"The most common sign of subsidence is cracks appearing in the wall, especially around the door and window frame," Richard Mason, an official from the site, commented.
"All buildings naturally experience some cracking, so homeowners or buyers needn't always panic. Any cracks wider than your thumb however, may mean there is evidence of subsidence. In this case you should alert your insurer immediately so they can assess the situation."
Click here to run an energy price comparison, and see if you could be paying less for your gas and electricity.