Hi, been lurking here on and off for a few years now and thought i would add to this post concerning Scottish law on planning permission for sheds.
As of the 6th Feb 2012 the rules are:
Class 3A.
(1) The provision within the curtilage of a dwellinghouse of a building for
any purpose incidental to the enjoyment of that dwellinghouse or the alteration,
maintenance or improvement of such a building.
(2) Development is not permitted by this class if—
(a) it consists of a dwelling;
(b) any part of the development would be forward of a wall forming part of the
principal elevation or side elevation where that elevation fronts a road;
(c) the height of the eaves would exceed 3 metres;
(d) any part of the development would exceed 4 metres in height;
(e) any part of the development within 1 metre of the boundary of the curtilage of the
dwellinghouse would exceed 2.5 metres in height;
(f) as a result of the development the area of ground covered by development within
the front or rear curtilage of the dwellinghouse (excluding the original
dwellinghouse and any hard surface or deck) would exceed 50% of the area of the
front or rear curtilage respectively (excluding the ground area of the original
dwellinghouse and any hard surface or deck);
(g) in the case of land in a conservation area or within the curtilage of a listed
building, the resulting building would have a footprint exceeding 4 square metres.
My local BCO was not concerned about out buildings provided it was over 5 metres from any dwelling, no one lived in it, there was no sanitary ware installed and no solid/fossil fuel heating.
If any of this is breached then a building warrant would be needed.
As to boundary/construction materials it is whatever you choose be it brick or wood as long as it is over 5 metres from any dwelling.
Upto 15 sqm it can be made from twigs but from there to 30sqm it must be of sound construction to regs. This is not enforced unless over 30sqm, so how do they know? best be on the safer side though. With regards to height it follows with planning rules.
Edit: usual rules apply to installation of power supply if needed
That has been my experience with Renfrewshire Council, quite straight forward really with just a phone call. I started my build back in december but it has had a few setbacks, the latest being with Scottish Water.