SCHEDULE 2Permitted development rights
PART 7Non-domestic extensions, alterations etc
Class J – hard surfaces for industrial and warehouse premises
ConditionsJ.2
Development is permitted by Class J subject to the following conditions—
a
where there is a risk of groundwater contamination the hard surface must not be made of porous materials; and
b
in all other cases, either—
i
the hard surface is made of porous materials, or
ii
provision is made to direct run-off water from the hard surface to a permeable or porous area or surface within the curtilage of the industrial building or warehouse.