Moving my combi boiler

Hi,

I moved into my house a while back, and one of the issues with the survey was that the boiler was too close to the outside door - thus allowiing fumes to get back into the house.

Now for the above reason, plus for asthetics, I want to move to boiler to another area of the kitchen. Does anybody know how difficult this is likely to be? Am I looking at a few hundred (£300-500) or much more? I guess the plumber will need to re-route the pipes to reach the new position of the boiler which may take some time.

Thanks for your help.