Putting in an ensuite and fitted wardrobes

[nomoreminibreaks]

Our house has a (badly built) extension with a garage and kitchen extension and two bedrooms above. The bedroom above the garage is the largest in our house but also the coldest so we don't currently use it.

What I'd love to do is turn the smaller room into and ensuite (it's next to the main bathroom so I imagine that would help), somehow insulate the larger room to make it warmer (or maybe underfloor heating?) and put a door between the two rooms.

It's a long shot but has anyone done anything like this who could tell me what this might cost or give me any tips?

No idea but we are currently about to start building an extension over our garage. You need to make sure that the floor is properly insulated from the garage below: you could be losing a lot of heat there.

I would say a minimum of 4-5k for the bathroom work for the plumbing, electrics and fixtures and fittings (could be more or less depening on the bathroom suite/taps/shower you go for).

Fitted wardrobes are extortionate: easily 2-3k for those (we just go to Ikea!).

Not dissimilar to our house, though your garage sounds rather bigger than ours (have a single bedroom and smaller room at back with dogleg of stairs and landing).

First thing we did was max out the insulation (product called Celotex I think - rigid foam panels - to vertical surfaces, and full thickness - 400 mm? - insulation elsewhere) and mastic along all the skirtings. BIG difference. Also insulated loft properly at same time. Total insulation (incl. labour) was about £400.

We reconfigured the walls (previously had a cupboard of an ensuite) and had a proper shower / WC / basin plus storage over WC and under sink with a big towel rail, fan, downlights, tiles etc put in for £4.5k.

We ripped out the fitted wardrobes so can't advise on cost there. Got 2.5 wardrobes with all shelves, rails etc from IKEA recently for £1k.

Personally find tiled floor in shower room cold in winter, but bedroom is toasty.

Should add that we replaced the radiator with a modern one to ensure it could kick out some heat if we wanted it to (and it does).