So glad you asked before doing upgrades that do not necessarily bring value to your home.
Kitchens and bathrooms are always good rooms for upgrades. One question I get A LOT is - we don't use the bath tub, and prefer to have a giant shower with multiple shower heads. When you change a master bath from a five piece to a four piece, this may turn away some buyers. If you have another tub in the home, that could work still. AND, if you make that shower a masterpiece, it could off-set the tub.
Kitchens are seeing different counter tops now - laminate is going by the wayside, and granite, quartz and concrete are making their way into many homes. Farm or apron sinks are popular along with stainless steel sinks. Be careful not to go too trendy with the back splash, as some trends come in and move out quickly. Tile or wood flooring in the kitchen is most popular in Denver. Stainless steel appliances are still in, and thank goodness there are those that don't leave fingerprints!
Finishing basements is another area to be careful not to overspend. Typically you see $10/square foot in the basement. If you have a walk-out and backing to open space brings value, and a bathroom in the basement will add $8-10,000. Adding wet bars and fireplaces add value also. Have had someone spend $200,000 in their in-ground basement and thought they would get every penny back.
Windows, furnaces, air conditioners, new water heaters and new roofs are always good value.
The other area that a homeowner will not see much of their recouped dollars is the yard. Definitely sprinklers, fencing, and decks/patios will add value. Adding expensive trees, bushes, lazy river, etc. will only add desire for the buyer, not value in the eyes of the appraiser.
If you have questions, and wonder if your latest remodel will reap extra dollars, give me a call. Also, if you do the remodel and get to enjoy these upgrades, is best. I see many do these upgrades, just in time to sell, and only enjoy them for a month, and wish they had done it long ago!