Some listings on Uniplaces have some or all of the bills (water, electricity, internet and gas) included in the monthly rent.
However, there might be a cap set for specific bills or for all bills. A cap means that the bills are included in the monthly rent only up to a certain value. If the utility bill goes over that value, you will need to pay the difference.
To find the cap value, visit the listing you're interested in and hover your mouse over the grey tooltip box below the rent on the fixed booking bar, right at the bottom of your screen. You can also find the bill cap under the Rental Conditions section in "Bills".
All bills included
Some bills included