On Tue, 18 Jul 2006 15:02:27 +0100, "Christian McArdle"
wrote:

Make sure you get the council's agreement before you proceed, though! There
are many possible gotchas and local interpretations.

From memory if the planned extension is near a boundry, for example I
think that excludes the option of using permitted development rights.
The location of the windows would also be important. Talk to your
local planning officer. He/she can tell you better than I.

Mark