Planning Law and garage build

Just been through this little melarky although mine was a bit different in that in was in front of the principal elevation which they did not like too much! Your best best is to read through the planning portal website as this guidance forms the basis for all planning across all the councils.
www.planningportal.co.uk/info/200130/common_projects/43/outbuildings
It's not difficult if you follow the application guidelines and depending on the size,type and location, you may not require any permission under the "permitted developments" section.

As above check your local planning portal, Local Authorities also have s free 10minute consultation service, take some phots plans etc of the location and go from there. I'm just finishing mine.(its on here) mines 2 meters from the side boundary, 2.4 from the front boundary (due to keeping in line with the front elevation of the house), 2.3 to gutter and 4 meters dead on ridge height. This was all done under permitted development. However as we have come across at work some houses especially some new build have these rights removed.

M

I found the council building inspectors very helpful when I was making changes on my last house, maybe ring them and ask for advice?

Planning permission & permitted development, I thought I had some links but can only find one (see #3 and #9)
www.homebuilding.co.uk/20-things-you-can-do-no-planning-permission-required/#garages

From memory, it depends on size (percentage of your overall property), distance from boundaries, height, and where it is (permission is easier if it's behind the house not in fornt)   

has to be 3 metres from house ,

^ good idea from above - a friend got a neat office / workshop from the folk below and liked their clear & simple advice.
They list the rules here, should give you a good idea (suggest you re-check your local council etc before deciding)   dunsterhouse.co.uk/building-regulations-2
 

depends on if it has a dwarf wall or not, mines got 7 courses of brick work with a timber frame above, I required building regs, but due to the size no planning

forum.retro-rides.org/thread/201546/garage-build-9x5-oak-framed

Good luck with the project, sounds like a lot of *fun* (if that's what you enjoy doing)  

For info, I went to look at a house project similar to yours last August, I'm still trying to agree a price with the seller Stalemate 
Their view is it will be nice (ie worth lots) with a bit of work, I agree but think it's overpriced as the jobs I know about will take a lot of time & money (it needs a new roof, then everything inside stripping out totally, & the overgrown mini-forest out back needs sorting out ). 
It's been on the market since last July, most houses in that area sell in a few weeks so I guess I'm not the only one who thinks they are asking a bit too much  

And before anyone asks for pictures!
I'm not going to post any until we have moved in!
Don't want to take the P!$$ out of their beloved Kitchen and jeopardise the sale until it's OUR Hated Kitchen. Just incase they or anyone they know uses this forum.