detached garage - adding RSJ's - building regs?

[romeob]

Hi!

I am looking for a bit of advice regarding a double garage (detached) at a property I am buying.

It has two single up+over garage doors, and a supporting central wall between the doors (running front to back, supporting the roof - small pitch at front, long sloping pitch to the back) (not side to side).

Does anyone know if it’s compulsory to put planning permission or anything in with our council to:
1) remove both garage doors and add one RSJ with a full width roller shutter
2) remove central supporting wall and add in an RSJ front to back to open up the garage to its full width?

Would either require a survey to determine load bearings etc if so? Or does this not apply?

I realise the 2 RSJ's will mean one sits ontop of the other, in a T shape.

It’s currently approx 6m wide by 8m deep, built in the 80's, I’d say 3m total height at the top of the pitch if I had to guess

It’s detached and about 5m away from the main dwelling if this makes any odds to what you can/can't do yourself. Would be used as a games room or part garage, part mancave I guess, with tools/workshop/maybe pool table. At some point I’ll want to change the roof itself to be a more equal pitch to make some rafter/storage room but for now it’ll stay as it is.


Advice appreciated! Cheers

 

[23vc]

You might want to get calcs done to know the right steel size, padstones etc but don’t believe this falls under BR as it’s unlikely to originally have been subject to it despite being large enough to fall under BR if it was built today.

 

[cdbe]

Presumably not much weight (just roof) but 8m is a pretty big span for steel and 6m carrying one end of the 8m is decent. Smaller opening width and anything (post/pillar) anywhere along the 8m length would make a difference.

Maybe a trussed roof sooner would allow you to do away with the 8m length.

 

[^woody^]

No permission would be required, but you should ensure the work is properly designed and carried out.

 

[romeob]

Thanks - with regards to the trussed roof, is that something I can just do and not involved planning/BR? Assume it needs to meet a maximum of 4m at the top point / ridge, is that correct - much like garden building regs? (Which is bigger than now, and would give me some roof above for storage I guess)

 

[romeob]

Maybe a trussed roof sooner would allow you to do away with the 8m length.

yes that's something i'd considered, but again unsure if it means i need to go down the BR rabbit hole or anything. i imagine changing from one trussed roof (supported on the 8m block wall) to another one supported better/differently, it would mean speaking to someone - or doesn't this apply do you know?

 

[23vc]

Shouldn’t have to involve either planning or building control as it’s pre-existing and not being made any bigger. But as said, should still speak to SE etc as required

 

[romeob]

Shouldn’t have to involve either planning or building control as it’s pre-existing and not being made any bigger. But as said, should still speak to SE etc as required

thanks - is this with regards to the RSJ's, and what if i redo the pitched roof how it is now, to a "better" one - this attached diagram is how it looks now (not my image, but same style, and has a little side access traditional door too). i'd like to just change it to be as tall as it can legally go, is that 4m to the ridge without further hassle?