Building Regulations 2010 H4
Rainwater drainage
Official text
H4.—(1) The erection or extension of a building or work involving the underpinning of a building shall be carried out in a way that is not detrimental to the building or building extension or to the continued maintenance of the drain, sewer or disposal main.
(2) In this paragraph “disposal main” means any pipe, tunnel or conduit used for the conveyance of effluent to or from a sewage disposal works, which is not a public sewer.
(3) In this paragraph and paragraph H5 “map of sewers” means any records kept by a sewerage undertaker under section 199 of the Water Industry Act 1991.
Limits on application
Requirement H4 applies only to work carried out—
(a) over a drain, sewer or disposal main which is shown on any map of sewers; or
(b) on any site or in such a manner as may result in interference with the use of, or obstruction of the access of any person to, any drain, sewer or disposal main which is shown on any map of sewers.
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