Are you planning on selling or buying a home built before 1978?  If so, you need to be aware of the possibility of lead-based paint.  Since lead poisoning is a serious health concern, checking for the possibility of peeling or chipping paint is a must for any appraiser completing an appraisal for FHA, VA, or USDA financing.

HUD article: 

https://www.epa.gov/sites/production/files/2020-01/documents/lead_in_your_home_brochure_color_2019.pdf