In my research, I've found that the cost of repairing water damage in a house can greatly vary. It can range from a few hundred dollars for minor issues like a small leak, up to several thousand for more severe problems such as flooding or structural damage. Factors affecting the cost include the extent of the damage, the affected area's size, and whether you need professional help. Also, it's crucial to act promptly, as delays can lead to mold growth and further damage, increasing the repair cost. Insurance may cover some costs, but it depends on your specific policy.