From experience there are two rooms that sell houses. The kitchen and the bathroom. Spending money to give a tired bathroom a facelift is not a waste of money, it's a solid investment in your home's equity and resale value. It's a decision you can make knowing you aren't throwing money away on something frivolous, but actively adding value to your biggest asset. Having said that though, you still want to be careful not to overcapitalise. The best type of bathroom renovation is a cosmetic renovation without too much structural change. In this instance you would re do the tiles, the painting, and maybe a few of the applicances like towel rails, shower glass, and toilets. Avoid moving any walls or plumbing. This will save a lot of money.