Utilities will vary on how much you use (user pays system here)

DEWA (Dubai Electricity Water Authority) bills will range from approx 500dhs per month- 4000dhs+

Obviously bills are higher over summer, with extra water/aircon being used)
There is also a 5 % Municipality fee .
It is 5% of your rent, and is spread over the 12 months

It will depend on size of villa, size of garden, how cool you want the villa etc