A 2018 HomeAdvisor survey found that homeowners underestimated the cost of fixing or updating just about everything in their homes. When it came to interior painting, for example, survey participants estimated the work would cost $734. But the national average is $1,744. One of the few items they overestimated was a new toilet — the average is $370, not $405.
How to DIY it: This job can be messy, so protect nearby surfaces by covering them with plastic or cardboard. Spray the springs with garage door lubricant (about $7 at home centers). Don’t use oil, grease, or other lubricants. They may be cheaper, or you may have them on hand already, but they won’t work as well and tend to pick up dust and grit—just what you don’t want on moving parts.