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Would it need planning permission to have had the room added? Maybe that's why there are no windows and the door is still there.
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Assume you'd need to alter the construction of it.
It's likely single skin brick with no insulation in the walls or in the roof etc.
I think all that requires sign off at the very least and probably planning permission unless you can get it done under permitted development?
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@DethBeard for absolute certainty, ensure that
- you do not live in a conservation area
- your home does not have listed building status
- that permitted development is acceptable without planning consent for your property
this is all free information you can get from your local authority planning department, to establish whether you need planning and listed building consent. And before you consider converting your garage to a habitable space.
the rest should be picked up by building regs application with plans, details, specifications. A builder will charge separately for this and include building control review of detailed proposal and site inspection(s) for discharge. make sure whoever you go to building wise has 'all risk building insurance' and competent for all trades, because you will need those test certificates on completion.
the changes to be mindful of could involve thermal insulation to garage floor, walls, roof. Natural daylight and natural ventilation via new window(s) trickle vents, internal heating. Also plan to move gas meter outside make sure it's accessible by the utility company.
Other things to consider. Informing your mortgage provider and Building Insurance provider. Getting them both to agree in principle your plans for garage conversion.
good luck, it'll look sweet i'm sure :)
- you do not live in a conservation area
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Wrote all of this and then realized we're in home "do it yourself". I have no idea how much it would cost to do it yourself but I'll leave this anyway:
15-30k I think probably covers 75% of reasonable conversions like you described. Could very easily be much more money. You can very easily run into a problem that cost 5K.
You have to consider expensive materials (floors, windows), HVAC, insulation, ventilation, gutters, moving the gas line.... what are you going to do with the garage door, and what does it mean for insulation and ventilation?
Proper ventilation and insulation is a really big deal if it gets below freezing, or else you will get giant ice dams. This is the kind of issue that could ruin the project...
Materials you choose to use will greatly affect the price. You might be surprised by how disappointed you are with the affordable options. "Oh hey I like that tile" = 15 bucks each, while "No I don't really like that tile" = 3 bucks each
I just went through all of this with an entire house so I have an idea of what's going on.
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@DethBeard
Anyone know the rough cost of a garage conversion?
We have a garage on the side of our house, but it has a room in it, without windows, that is just like a box has been built inside the garage (if that makes sense?)
The garage door doesn't open, there is access through our dining room, via a standard internal door.
We want to have it made into a proper room, with natural light, etc.
It already has power and the gas meter is in there too (will that have to be moved?)