Changes to Part G of the Building Regulations
Businesses involved in designing and/or erecting new buildings in England and Wales. Businesses involved in designing the conversion of and/or converting existing buildings in England and Wales. Businesses that manufacture and supply water-related equipment for use in buildings in England and Wales.
Takes effect on
6 April 2010
From 6 April 2010, Part G of the Building Regulations will change.
G1 will specify that wholesome cold water must be supplied where drinking water is drawn off and where food is prepared.
However, only water of suitable quality need be supplied to any sanitary convenience fitted with a flushing device. This means that recycled water and harvested rainwater may be used to flush WCs and urinals.
Under G2, new homes will have to meet a new water efficiency standard, expressed as a maximum of 125 litres per person per day.
G3 sets out enhanced provisions on hot water supply and safety. It requires that systems have to be able to resist the effects of temperature and pressure during both normal operation and in the event of malfunction.
Additionally, baths in new dwellings will have to be fitted with a thermostatic mixing valve (TMV) to limit the temperature of the supplied hot water to 48°C to prevent scalding accidents.
Note that G2 and the TMV requirement in Part G3 will apply not only to newly erected dwellings but also to dwellings created in existing buildings, eg where an old industrial building is converted into flats.
G4 is an update to the current G1, which covers the scale of provision and layout of sanitary conveniences and handwashing facilities in both residential and non-residential buildings.
G5 is an update to the current G2 and extends the requirement to provide a bathroom in dwellings to buildings containing one or more rooms for residential purposes, eg hotels, hostels and residential homes. However, this does not extend to patient accommodation in hospitals and similar establishments.
G6 requires that a suitable sink must be provided in areas where food is prepared.
- Download Approved Document G from the Planning Portal website (PDF, 837K) - Opens in a new window
- For an overview of current law in this area, see our guide: Regulation - Commercial building construction
Full title of regulation
Building and Approved Inspectors (Amendment) Regulations 2009 (SI 2009/1219) - as amended by the Building and Approved Inspectors (Amendment No.2) Regulations 2009 (SI 2009/2465) and the Building and Approved Inspectors (Amendment) Regulations 2010 (SI 2010/719)
Communities and Local Government
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