Hi,

I'm thinking of blocking off my existing external back door (to extend
my kitchen) and having french doors fitted in place of the large dining
room window to use as the back door instead.

Are there any laws stopping me from blocking off an external door? If
not, is this an expensive job? I have absolutely no idea how to do this
and would have to pay a specialist to do both these jobs.

Your thoughts/ideas and general costing advice would be greatly
appreciated.

Thanks