Recommendations for a garden office supplier/builder? South East England

[jim_from_surrey]

I need to put up a garden office, probably a log cabin type but am open to other types.

Because of local restrictions (designated area of outstanding natural beauty) i need full planning permission for it and it has to be in keeping with a wooded (forest) environment.

It needs to be at least 20'x12' (6m x 4m), has anyone any recommendations of suppliers/builders of these types of buildings?

Looking through all the sites and on ebay, theres all sorts of different wall thicknesses, floor trusses, roof construction etc - does anyone know of a good info page i can find out more about the technicalities of this type of building?

I've got some extremely heavy filing cabinets and other racking that need to go in there, plus it needs to be secure and insulated, along with electrics etc - anyone got any pointers or tips that might help me with this?

My budget is around £10k.

Thanks all!

Jim