Paragraph 23 Height controls: general
In each zone, authorised works of the description given in the second column of each row of the table in Schedule 4 (maximum height parameter tables) (a “parameter table”) whose title refers to that zone must not exceed the height, specified in metres AGL and, where appropriate, AOD, in the third column of the same row of that table, subject to any condition or limitation set out in the second column of that row.
Each row of a parameter table, read with sub-paragraph (1), comprises a distinct height control, which is referred to in the parameter table in which it is set out by the number of the row which appears in the first column of that row.
Other height controls—
are set out in condition 22(5)(a)(ii) (construction worker accommodation), condition 24 (height controls to secure an articulated skyline), condition 43 (impact of authorised works on natural light in certain dwellings) and condition 47 (means of enclosure with a height of more than 5.4 metres AGL), and
may be set out in an endorsement condition.
If more than one height control requires an authorised work not to exceed a specified height, that authorised work must be constructed so that its height does not exceed the height permitted by whichever of the height controls applicable to it requires it to have the lower, or lowest, height.
For the purposes of sub-paragraph (4), if a height control is expressed in terms of a specified number of metres AGL and a specified number of metres AOD, and the effects of the control as expressed in metres AGL and metres AOD are different when applied to a particular case—
the specified numbers of metres AGL and AOD referred to in that height control are to be regarded as two distinct height controls in that case,
whichever of the specified number of metres AGL or AOD gives the higher height is to be disregarded in that case, and
the height control is to be read and given effect in that case as if it were only expressed in terms of whichever number of metres (AGL or AOD) specified in it gives the lower height.
No height control set out in a Schedule 3 condition or parameter table applies to a crane used in construction work, whether or not it is mounted on a building or other structure.
No height control set out in a parameter table, read with sub-paragraph (1), applies to an authorised work to the extent that it is an authorised work of the kind described in condition 47 (means of enclosure with a height of more than 5.4 metres AGL).