Much more loaded question than you think as these can be easy or, because of one little thing, be much more than expected.
What kind of heating does the building currently have? If it's central then there's already venting so usually you need to add electrical and condenser units. Some places already have electrical setups. Depending on age you may have to do more updating to the electrical than expected. If it's radiator heat then you need to run venting which would be a lot more.
Regarding adding laundry, do you have room to add it? You have to do this properly (i.e. proper drainage, tiling floor, etc.) as water can wreck havoc on your property. Some buildings can run it in a closet and have the same floor plan so the plumber goes straight up/down. Some have different layouts so you can add it to floor 1 yet not 2 and 3 or floors 2/3 are good yet floor one has a different layout (of course anything can be done for a price, yet stating in reasonable terms).
Digging down is expensive and hard to estimate. You're looking between $35-50k, especially if you need to run drain lines (which you'll likely want to do). How high are the ceilings currently?