Lead-based paint and lead contaminated dust are the most hazardous sources of lead for U.S. children. Lead-based paints were banned for use in housing in 1978. All houses built before 1978 are likely to contain some lead-based paint. However, it is the deterioration of this paint that causes a problem.
If possible, buy a house built after 1978 to avoid lead paint.
Plaster walls were used to finish interior houses up until the 1950s at which time it was replaced with drywall. Plaster walls are like stucco. Since they are hard, cutting and drilling a hole for, say, hanging a picture is difficult.
If possible, buy a house after the 1950s to avoid having to deal with plaster walls.
Avoid Old Wiring Systems
Old homes used knob and tube wiring till around 1920. After that, flexible cables were used till the 1940s. After that, cables were run through metal conduit till around 1965. Around 1965, homes began using modern NM cable commonly called Romex.
If possible, buy a house after 1965 to avoid having to deal with old wiring systems.
Roofs are one of the most expensive parts of a house. Replacing the shingles on a roof can cost around $10,000. Shingle roofs commonly have a lifespan of 25 years.
If possible, find out when the roof was installed to determine whether the roof will need replacing soon or not.