Exemption in respect of single dwelling-house on land
10.  A person shall be exempted from liability to pay any development charge under section 35 of the Act for the following development of land authorised on or after 1st March 2001:
(a)any addition of floor area for residential use to an existing dwelling-house erected on one or more lots of land where there is no other dwelling-house erected on such lot or lots of land; or
(b)the erection of a single dwelling-house on one or more lots of land on which —
(i)one or more dwelling-houses exist at the time of the application for planning permission or conservation permission for the development and such existing dwelling-house or dwelling-houses are to be demolished; or
(ii)one or more dwelling-houses had existed at any time prior to the application referred to in sub-paragraph (i).