Power or Lights out?
First things first if it's night have a look around your next door neighbours lights and see if they're on. If they are then it's localised to your house.
Ring your Power Supplier, is your account current?, ask them to send a linesman out to check the incoming power to your house.
If they say you need an Electrician call us, we'll send one of our call out Electricians to help.
0508 248 935
(0508 CITY ELECT)