Approved Document G - Sanitation, hot water safety and water efficiency

This part covers the standards required for cold water supply, water efficiency, hot water supply and systems, sanitary conveniences and washing faclities, bathrooms and kitchens and food preparation areas.

Download current Approved Document G - 2015 edition with 2016 amendmentsApproved Document G

PDF file: 347KB, 55 pages

2015 edition with 2016 amendments: Valid from 1 March 2016

Download 2016 amendments2016 Amendments to Approved Document G

PDF file: 72KB, 2 pages

2016 amendments: Valid from 1 March 2016

Quick links

The requirements in this edition of Approved Document G are as follows:

G1 - Cold water supply
(1) There must be a suitable installation for the provision of:
(a) wholesome water to any place where drinking water is drawn off;
(b) wholesome water or softened wholesome water to any washbasin or bidet provided in or adjacent to a room containing a sanitary convenience;
(c) wholesome water or softened wholesome water to any washbasin, bidet, fixed bath or shower in a bathroom; and
(2) There must be a suitable installation for the provision of water of suitable quality to any sanitary convenience fitted with a flushing device.

Limits on application
None

G2 - Water efficiency
Reasonable provision must be made by the installation of fittings and fixed appliances that use water efficiently for the prevention of undue consumption of water.

Water efficiency of new dwellings
36. (1) The potential consumption of wholesome water by persons occupying a new dwelling must not exceed the requirement in paragraph (2).

(2) The requirement referred to in paragraph (1) is either -
(a) 125 litres per person per day; or
(b) in a case to which paragraph (3) applies, the optional requirement of 110 litres per person per day,
as measured in either case in accordance with a methodology approved by the Secretary of State.

(3) This paragraph applies where the planning permission under which the building work is carried out-
(a) specifies the optional requirement in paragraph (2)(b); and
(b) makes it a condition that the requirement must be complied with.

Wholesome water consumption calculation
37. (1) Where regulation 36 applies, the person carrying out the work must give the local authority a notice which specifies-
(a) which of the requirements in regulation 36(2)(a) or (b) applies to the dwelling; and
(b) the potential consumption of wholesome water per person per day in relation to the completed dwelling.

Limits on application

Requirement G2 applies only when a dwelling is:
(a) erected; or
(b) formed by a material change of use of a building within the meaning of regulation 5(a) or (b).

G3 - Hot water supply and systems
(1) There must be a suitable installation for the provision of heated wholesome water or heated softened wholesome water to:
(a) any washbasin or bidet provided in or adjacent to a room containing a sanitary convenience;
(b) any washbasin, bidet, fixed bath and shower in a bathroom; and
(c) any sink provided in any area where food is prepared.

(2) A hot water system, including any cistern or other vessel that supplies water to or receives expansion water from a hot water system, shall be designed, constructed and installed so as to resist the effects of temperature and pressure that may occur either in normal use or in the event of such malfunctions as may reasonably be anticipated, and must be adequately supported.

(3) A hot water system that has a hot water storage vessel shall incorporate precautions to:
(a) prevent the temperature of the water stored in the vessel at any time exceeding 100oC; and
(b) ensure that any discharge from safety devices is safely conveyed to where it is visible but will not cause a danger to persons in or about the building.

(4) The hot water supply to any fixed bath must be so designed and installed as to incorporate measure to ensure that the temperature of the water that can be delivered to that bath does not exceed 48oC.

Limits on application

Requirement G3(3) does not apply to a system which heats or stores water for the purposes only of an industrial process.

Requirement G3(4) applies only when a dwelling is -
(a) erected;
(b) formed by a material change of use within the meaning of regulations 5(a) or (b).

G4 - Sanitary conveniences and washing facilities
(1) Adequate and suitable sanitary conveniences must be provided in rooms provided to accommodate them or in bathrooms.

(2) Adequate hand washing facilities must be provided in:
(a) rooms containing sanitary conveniences; or
(b) rooms or spaces adjacent to rooms containing sanitary conveniences.

(3) Any room containing a sanitary convenience, a bidet, or any facility for washing hands provided in accordance with paragraph (2)(b), must be separated from any kitchen or any area where food is prepared.

Limits on application
None

G5 - Bathrooms
A bathroom must be provided containing a wash basin and either a fixed bath or a shower.

Limits on application

Requirement G5 applies only to dwellings and to buildings containing one or more rooms for residential purposes.

G6 - Kitchens and food preparation areas
A suitable sink must be provided in any area where food is prepared.

Limits on application

None

Archived copies of Approved Document G

Download current Approved Document G - 2015 editionApproved Document G - 2015 edition

PDF file: 487KB, 55 pages

Valid from 1 October 2015 until 1 March 2016


Download 2013 amendments2013 Amendments to Approved Documents

PDF file: 478KB, 54 pages

Valid from 6 April 2013 up to 1 October 2015


Download current Approved Document GApproved Document G - 2010 edition incorporating further 2010 amendments

PDF file: 1.86MB, 48 pages

Valid from October 2010 up to 1 October 2015

The requirement in this edition was:
G1 -Cold water supply
G2 - Water efficiency
G3 - Hot water supply and systems
G4 - Sanitary conveniences and washing facilities
G5 - Bathrooms
G6 - Kitchens and food preparation areas


Download Approved Document G 2010 editionApproved Document G - 2010

PDF file: 833KB, 45 pages

Valid from 6 April 2010 until October 2010

The requirement in this edition was:
G1 -Cold water supply
G2 - Water efficiency
G3 - Hot water supply and systems
G4 - Sanitary conveniences and washing facilities
G5 - Bathrooms
G6 - Kitchens and food preparation areas


Download Approved Document G 1992 edition incorporating 1992 and 2000 amendmentsApproved Document G - 1992 edition incorporating 1992 and 2000 amendments

PDF file: 392KB, 18 pages

Valid from 1 January 2001 until 6 April 2010

The requirement in this edition was:
G1 - Sanitary conveniences and washing facilites
G2 - Bathrooms
G3 - Hot water storage


Approved Document G 1992 editionApproved Document G - 1992 edition

No download currently available

Valid from 1 June 1992 until 1 January 2001

The requirement in this edition was:
G1 - Sanitary conveniences and washing facilites
G2 - Bathrooms
G3 - Hot water storage


Approved Document G 1990 editionApproved Document G - 1990 edition

No download currently available

Valid from 1 April 1992 until 1 June 1992

The requirement in this edition was:
G1 - Deleted - no requirement
G2 - Bathrooms
G3 - Hot water storage
G4 - Sanitary and washing accommodation


Approved Document G 1985 editionApproved Document G - 1985 edition

No download currently available

Valid from 11 November 1985 until 1 April 1990

The requirement in this edition was:
G1 - Food storage
G2 - Bathrooms
G3 - Hot water storage
G4 - Sanitary conveniences


Quick links to other Approved Documents

The regulations cover all aspects of construction and are constantly reviewed. The guidance documents referred to as 'Approved Documents' contain practical ways and explanations of how to comply with the functional requirements of the Building Regulations.

These 'Approved Documents' are separated into 14 parts:

  • Part A - Structure
  • Part B (Volume 1) - Fire safety (Dwellinghouses)
  • Part B (Volume 2) - Fire safety (Buildings other than dwellinghouses)
  • Part C - Site preparation and resistance to contaminants and moisture
  • Part D - Toxic substances
  • Part E - Resistance to the passage of sound
  • Part F - Ventilation
  • Part G - Hygiene
  • Part H - Drainage and waste disposal
  • Part J - Combustion appliances and fuel storage systems
  • Part K - Protection from falling, collision and impact
  • Part L1A - Conservation of fuel and power in new dwellings
  • Part L1B - Conservation of fuel and power in existing dwellings
  • Part L2A - Conservation of fuel and power in new buildings other than dwellings
  • Part L2B - Conservation of fuel and power in existing buildings other than dwellings
  • Part M (Volume 1) - Access to and use of buildings (Dwellings)
  • Part M (Volume 2) - Access to and use of buildings (Buildings other than dwellings)
  • Part P - Electrical safety - Dwellings
  • Part Q - Security - Dwellings
  • Part R - Physical infrastructure for high-speed electronic communications networks
  • Regulation 7 - Materials and workmanship