On 31 May, 13:01, adder1969 wrote:
Hi, I have a chimney that runs through the middle of my house.

Any other ideas? Just get someone in to do it?!

You could do what the owner of my first house did and just remove the
stack all the way throught the house and then support the external
stack using a steel section from an old bed! This had worked quite
well for many years, but did get picked up on the structural survey.

Alternately do it 'properly':- Get a structural engineer in to
calculate the type of beam you will need, at a cost of £500+. Then get
building regs approval from the local council. £200+ ??

I am in a similar quandry myself with my current house. The cost of
doing the actual work is relatively low, just doing it within the law
is going to add 150% to the cost.