Garage conversation

[Lulumona]

Hello does anyone know roughly how much a garage conversation would coat
1 tier ?
Garage and extra floor above ?
Thank you

@Lulumona garage conversation would coat

I didn't know garages could talk or that it was cold enough to wear a coat yet well not until at least January.

The short answer is more than you expect and it depends on the construction. The foundations might not be big enough to take the weight and you would need to get building regulations involved at a higher standard than for a garage. It could well be a knock down job and rebuild to be more cost effiective.

It depends on the size of the garage and whether it already has power, water, insulation, concrete floor etc. Plus how many windows you want and whether you're creating new openings that need lintels etc. If you want to build above you might need deeper foundations too, plus you'll need planning permission.

We are about to do ours and I'm budgeting about £15k (not including anything decorative) but we already have power, water , wall insulation etc and won't be changing anything structurally at all, just putting in new windows where the current garage door is.

HasaDigaEebowai hi thanks for replies it has concrete floor gas electric and windows so I think £15 sounds reasonable for single.. hoe do you find a good tradesman?

Lol just seen conversation instead of conversion 😂

Does it have double skin walls all round? My understanding is that if it doesn’t it won’t meet thermal regs, and also that you won’t be able to build above; a single skin wall is not sufficient. Foundations will also need checking as pp has said.

We have done one .. our garage had the right foundations. We got a utility room, bedroom and small bathroom... cost around 40k for first fit ... all in was more like 55k.

We have done one .. our garage had the right foundations. We got a utility room, bedroom and small bathroom... cost around 40k for first fit ... all in was more like 55k.

And that shows the massive variance. If you're putting bathrooms or a kitchen in the space it will cost far more. Ours is just going to be a gym and so effectively just an empty room. Most of our work (apart from the new front wall and windows) is just cosmetic - new plaster boarding on walls and ceiling, skirting and coving, and new lighting, relocation of the boiler knock out of a back stud wall.

The other big cost can be the floor if you need a new concrete slab or damp proofing.

Oh and heating of course. That's one of our most expensive elements.

Floor may well be draughty where it meets the walls, and almost certainly not insulated underneath, so cold and potentially damp.
This is difficult to deal with without a new floor. (If you just lay insulating flooring on top, there is a risk of damp underneath, as the original floor will be cold still.)

It may be that a single storey using the existing structure, insloating it etc, would be a lot more cost effective than building up, but you'll need a structural survey to know for sure.

Yes you'd generally add damp proof membrane, floor insulation and screed even if the concrete slab itself is in good condition

Thank you for comments .. very helpful I'm still learning how to add comments here so apologies for late reply