I. Interpretation of Part 1
For the purposes of Part 1—
“resulting building” means the dwellinghouse as enlarged, improved or altered, taking into account any enlargement, improvement or alteration to the original dwellinghouse, whether permitted by this Part or not; and
“terrace house” means a dwellinghouse situated in a row of three or more dwellinghouses used or designed for use as single dwellings, where—
(a)
it shares a party wall with, or has a main wall adjoining the main wall of, the dwellinghouse on either side; or
(b)
if it is at the end of a row, it shares a party wall with or has a main wall adjoining the main wall of a dwellinghouse which fulfils the requirements of sub-paragraph (a) above.