An existing detached house has a manhole at the rear corner. A proposed single-storey extension will be stepped back about 300-400mm from the rear corner in order to miss the manhole by a similar amount.
The extension will be within Permitted Development, and hopefully the Regs can be dealt with via a Building Notice. *However*,Planning Portal states:
''You can apply for Building Regulations approval from your local authority Building Control Service by giving a building notice.
Plans are not required with this process so it’s quicker and less detailed than the full plans application. It is designed to enable some types of building work to get under way quickly; although it is perhaps best suited to small work.
There are also specific exclusions in the regulations as to when building notices cannot be used. These are:
For building work which is subject to section 1 of the Fire Precautions Act 1971
Part II of the Fire Precautions (Workplace) Regulations 1997
**For work which will be built close to or over the top of rain water and foul drains shown on the 'map of sewers'**
Where a new building will front onto a private street''
The manhole in question is the rearmost on a combined RW and foul drain, and receives only sink and washing machine water at present, but would receive foul too, from a proposed WC in the extension.
Is 300 - 400mm away from the manhole close enough to mean we have to do a full plans app?
Any experiences or thoughts?