Garage conversion ideas and costings.

[ThisMustBeMyDream]

I have attached the layout for the house I'm going to view tomorrow. We need a 4th bedroom, and would have liked a playroom too, which if the conservatory had been bigger would have been the idea option. But the compromise will have to be the children get a TV room rather than playroom, but I still need that 4th bedroom.
So what would you do in this layout? I have 15-20k to play with. There is already a door to the garage from the kitchen. So I'm wondering about creating a vestibule area with a door to a larger portion which would be a bedroom, and then a smaller portion as utility area. There is scope to extend the garage to the front of the house and have door access from the hall by removing the downstairs loo (which I'm happy to do, it already has 2 upstairs toilets).

I should add we are north west England, so not usually crazy prices for building work.

£20k will be tight - were in the North East and got a quote for a double garage conversion back in December of £50k.

Think of insulation, bricking up the garage door + installing windows, flooring, ceiling, plastering, lights, heating etc. Then add in extras for say a sink/plumbing in utility room, cupboards etc.

Well, I'm open to ideas. So to make one big room, keeping the front as the garage for example. The rear already has a window, but also has a door. I might consider bricking the door up though as it wi be a child's bedroom.
Budget is the budget, so I need to see what is achievable!

We did a garage conversion which was quite straightforward, replaced the garage door with wall and window. Obviously all internals, raised floor, ceiling, plasterboarding and plastering, electrics, heating etc. We did a lot of the work ourselves but did it for about £6k last year.

Can you create an internal door at the bottom of the stairs?

Not without removing downstairs loo, which I'm fine with. One less place for me to clean quite frankly!
It would be a long term move, maybe forever home. It's got loads of potential. So wouldn't be concerned about removing it.

Sorry should have added, that would only be if we went full hog and extended garage to front of house.

You need to look at your local council website to see what building regs would be needed to make it habitable.