100k gift - kitchen extension?

[TyrannasaurusJex]

We have recieved a generous gift of £100k and would like to do a kitchen extension. It would mean tearing down an existing conservatory and extending out about 2x5m, plus a new kitchen and bifold or sliding doors. A friend has said that £100k won't be enough for this! Devastated if this is the case. What do people think?
We're in Oxfordshire

For us we had a redundancy payment of £20k, £10k in savings and took out £70k extra on our mortgage. It was a lot and has stretched us but we worked out it was much more affordable than moving. To get the extra space we needed and move to another house in school catchment would have been £150k extra on the mortgage plus moving fees.

We're in Cheshire and we used a local Nantwich company (Holts KDE) to do ours, a similar design by your description. Our total spend was just over 80 thousand and was all complete by Christmas last year so I don't think costs will have gone up that much.

Its definitely worth shopping around and also getting involved as much as you can. Sourcing materials yourself and hiring skips and basically cutting down the man hours needed. The doors we're definite very pricy but it should be totally doable now for 100k!

Probably doable, depends partly on whether you will have to reinstate the garden afterwards (ours got completely trashed during the build). How high spec you want the kitchen (ours was Howden's and is really nice).

How much big glazing you want. Whether it will need a big steel, party wall agreement etc.

Ours needed 2 big steels and underpinning next door's wall which was about £15K. Kitchen was £27K, flooring £2K, lots of glass and big skylights was about £30K it adds up.