Serving parts of North West London and the Home Counties.

Extraordinary Conditions

We may class a development as extraordinary, in these cases we need extra time to complete your request accurately.


What is considered extraordinary


  • A site of over 500 plots

  • A site with specific difficulties such as geotechnical conditions; a water course; mains pressure (if the site is higher than the reservoir on a gravity fed system).

  • A need for offsite reinforcement that may require more than simply laying or upsizing of a main, e.g. booster pump.

  • A site near highways, e.g. major trunk road/motorways and where a site meeting with a highway authority is specifically required to scope out when/where the works may be carried out and the cost of traffic management.

  • Environmental issues especially in respect of SSSI or other designated sites; sites of archaeological interest.

  • Third party and Crown Estate land.

  • Protected undertakers, e.g. other utilities and network rail.

  • Schedule 13 Water Industry Act 1991 constraints.