Adding a new roof can easily increase the value of your home. It can increase the appraisal value and the perceived value. Some studies have even found that adding a new roof can return more than 100% of your investment. If your roof is not in good condition, it can make potential buyers very reluctant to purchase. Most buyers want a move-in ready home that does not need repairs. If your roof is relatively new and in good condition, adding a new roof may not increase your home value significantly. If you are unsure about replacing your roof you should consult a professional.