How much would it cost (roughly) to remove an electric heating system and install gas central heating?

I have seen a house I would really like to buy (having sold my flat). However, it currently only has electric heating. uming I can get gas in the house (neighbours in the area do have gas), does anyone know roughly how much installing mains gas and putting in a new gas boiler, gas pipes, connecting gas to water system, installing radiators and cooker connection (phew!)would cost?