For a normal retractable patio awning the electrical requirement is minimal
A normal domestic patio awning requires a standard 13 amp domestic plug or fused spur internally or an armoured weatherproof plug externally. Quite often for installation the power is taken from the first floor in a house as the height of the awning tends to put it at this level making it easy to go through into the room and take the power from the nearest socket available.
Please remember adding an infra-red heater always requires its own circuit from the fuse board.
Modern legislation means only a fully qualified electrician can provide a new plug in your home. This is even more important with outdoor power supplies. Our fitting and labour charges reflect our limitations, if we did retain an electrician we would have to charge a lot more.