Mr Punter

You also need to consider how to hold them open and secure them closed, gain ventilation as well as if they would be an issue should a fire break out.

There is at least 1 structural wall to the WC and it will be supporting floors and / or walls above. Not a big deal but needs a structural engineer to look at. The second kitchen looks like an add-on. If it is not a properly built extension it may be better to remove and start again. It is a bit of a hotchpotch at the back and £10-15k does not buy you much nowadays unless you are keen on DIY and / or have family in the building trade. There are some architect / designers on here who may chip in.

With rainscreen cladding and a strongly ventilated cavity I have heard that insects don't like to live in there.

I have found that if there is an existing driveway and dwelling, unless your proposal makes the arrangement worse, highways, planning and the fire service don't get too busy with it.

Brick acid? Do a test patch first.

Thanks for the update. I hope you are soon recovered.

With water consumption, we normally fill out a spreadsheet with the proposed fittings and their maximum consumption. Does not require a legal agreement.

Well that is great news for your project. Although you may find siblings tricky, at least they know your foibles and are not such a PITA as contractors can be.

So when you say all the openings are the same, do they all have a crack running down from the bottom left / right edge to the floor? Nothing at the top? Ground and first floor?

Won't they deliver to you?

No someone has messed up. Using mesh internally would be unusual.

Bifold doors tend to suffer from the issues you have experienced. I am not keen on them. I have had bifolds in the past and would not again. Lift and slide is my preferred option.

I agree. Far from a shitshow this is barely a skidmark.

I have often had to reduce some wall heights or taken down sections built with wrong DPC. You should be able to reuse the Marmox, which is good considering the price! Ground bearing slab is nicer in the winter as you don't have freezing air circulating underneath. So is it MOT, gas membrane, concrete, insulation then screed or are they in a different order? Either way I can't see too many issues that can't be worked around.

The circular columns are great.