It's best to be aware of what hurts property value so you can protect your home and get the most ROI when it comes time to sell. 1) DIY projects gone wrong. 2) Lack of curb appeal. 3) Unsightly interior wall paint. 4) Lack of upkeep. 5) Wall to wall carpeting. 6) Excessive clutter can hurt property value. 7) Unpleasant smells. More items... Oct 9, 2020