SCHEDULE 2Permitted development rights
PART 14Renewable energy
Class O – installation etc of flue for combined heat and power on non-domestic premises
Permitted developmentO
The installation, alteration or replacement of a flue, forming part of a microgeneration combined heat and power system, on a building other than—
a
a dwellinghouse or a block of flats; or
b
a building situated within the curtilage of a dwellinghouse or a block of flats.