One of the least desired resale upgrades. Whirlpool baths, and indoor hot tubs
Once considered chic, these are now often seen as just expensive, energy-guzzling extras. But boy can they sooth an sore back.
A surprising top ten resale upgrade. The Front porch
Two or three decades ago, tearing off front porches became fashionable, but now they're back in a big way. If you can, add a full front porch (or replace/repair the one you have if it isn't in top condition)