It's important for homeowners to know the difference between how much they spent on a home improvement and how much value it will add to their house. For example, if you spent $20,000 remodeling your kitchen, it doesn't mean the value of your house will increase by $20,000. The longer you own your house after the improvements are done, the more likely you are to earn back all of your costs when you sell your house. Also, remember that not all improvements are the same in regards to how much value they will bring to your home.
What the seller originally paid for the house and what the seller spent on renovations doesn't have that much influence on the value of the house.