Do you know if your house is on the flood map? Recent changes could mean you now are! How much does home insurance with flood cover cost? The amount you’ll pay for home insurance with flood cover is generally determined by the risk of flooding or water damage at your property. As a result, your location could have a significant impact on your premiums. Some other factors that may influence how much you pay for home insurance premiums include: - The type of cover you purchase - Any optional extra