Unlike the early phases of a construction job—which require skilled labor to frame walls, install plumbing pipes, and run wires—many finishing touches are comparatively simple and DIY-friendly. If you paint a basement remodel yourself, for instance, you can save up to $1,800.

When it pays: If you have skill, patience, or an experienced friend to teach you, setting tile, laying flooring, painting walls, and installing trim are good DIY jobs.

When it costs: The downside to attempting your own finish work is that the results are very visible. Hammer dents in woodwork, or sander ruts in hardwood floors will annoy you every time you see them. So unless you have a sure eye and a steady hand, don’t perform the tasks that only a skilled tradesperson will get right.