I think and have read opinions that such remodeling doesn’t tend to pay off in terms of the final sale price, but that it can increase the frequency of people being interested, because of the people who would prefer not to remodel themselves. As far as official value calculations, the effect is generally less than the cost. There are also people who would prefer to remodel things to their own taste anyway, or who like older stuff. So if you are remodeling to sell, it makes sense to think of it not as increasing your final net value, but as an investment that can increase interest in selling sooner. Depending on your house and the market, and how urgently you want to sell sooner, that might be important, or not. (And if you are in a crazy-good market where you’ll actually have competing bids at once, it might increase the number of people bidding against each other, which might possible also affect the final sale price.)