FAQ - Smart Forms for Hazardous Substances Consent Application

What is the purpose of this site?
Who should use this site?
What does this site produce?
Where can I find more information about The Planning (Hazardous Substances) Regulations?

What is the purpose of this site?

  • To help applicants apply for hazardous substances consent or,
  • To apply to vary an existing condition of consent or,
  • To apply to continue consent when there will be a change in control of part of the land.

Hazardous substances consent is a planning consent and is required for the presence above controlled quantities of certain hazardous substances. Consent is a key part of the controls for storage and use of hazardous substances which could present a major off-site risk.

It is important that applications include all the relevant information because incomplete applications can delay decisions being made.

There are no prescribed consent application forms in the current law. The content of this site is based on application requirements specified in the law, and the Health and Safety Executive’s experience of assessing residual risk of a major hazard accident for the purpose of providing advice to Planning Authorities.

This site will help applicants complete an application form because it prompts the applicant for information they will need to complete the form. The information includes:

  • the applicant’s details
  • site location for consent
  • substances for which consent is sought (selected from the list of substances in the law)
  • for each substance the maximum quantity being applied for
  • details of any storage vessels, any moveable containers, and any process vessels for each substance for which consent is being sought
  • location on site where the vessels/containers will be
  • details of how each relevant substance will be transported to and from site
  • details of the vicinity of the land
  • and other descriptive text not necessarily used by HSE to assess residual risk.

Consent is needed if specified hazardous substances will be stored or used at or above specified controlled quantities. The list of specified substances and controlled quantities is set out in Schedule 1 of the relevant Regulations —

The list of substances and controlled quantities is in three Parts:

  • Part 1 — Hazard-categories of substances,
  • Part 2 — Specifically named substances with their individual controlled quantities regardless of hazard category,
  • Part 3 — For hazardous substances that would not usually be present but it is reasonable to foresee they could be generated during a loss of control event.

Where a hazardous substance is covered by Part 1 (hazard categories) of the Schedule and is also listed in Part 2 (named substances), the qualifying quantity set out in Part 2 applies. After Part 3, the Schedule contains Notes relevant to the use of the list of substances and controlled quantities.

Exemptions to consent are described in Schedule 2.

Who should use this site?

Applicants who are:

  • unfamiliar with applying for hazardous substances consent,
  • who have not applied for hazardous substances consent for some time,
  • who wish to apply for changes to existing hazardous substances consent.

Hazardous substances consent applies to a range of sites with hazardous substances present in significant quantities, not to a specific activity such as chemical manufacturing. As well as chemical manufacturing, sites include, for example, where heating fuel is stored either in bulk in a vessel fixed to the ground or in moveable cylinders, and, for example, warehouses where road haulage companies store products. Consent is relevant where substances present health hazards or physical hazards or environmental hazards, such as toxicity to humans or potential to burn or explode or hazards to the aquatic environment.

What does this site produce?

This site generates an application form for: hazardous substances consent or variation of consent or continuation of consent, in the form of a word processing document. The document format is Open Office. The docx files are suitable for use in Microsoft Word 2007 or later.

Other software for handling docx files

How to convert docx for use in Microsoft Office 2000/XP/2003

Once you have used this site to fill in your application and to download the application form document, you can open the document using your preferred word processing software and make any further changes to the form that are needed.

Please note that any changes you make to the downloaded document will not be reflected in the application saved by this site.

You will have to submit your application form, along with other documents as specified in the Planning (Hazardous Substances) Regulations 2015 (England, Scotland or Wales as appropriate), to the relevant Planning Authority.


Where can I find more information about The Planning (Hazardous Substances) Regulations?

Planning Practice Guidance — Hazardous Substances

Land Use Planning – Why is HSE involved?

Health & Safety Executive – COMAH

Maps, Plans & Planning Applications: What to Submit


This site does not make use of cookies to store information about you. On the server that is handling your application, your session is tracked using a cookie named "HazSubConSessionId". When you download a completed application form using this site, the session manages the form data for you while your data is on the server. The server will unload (discard) the session approximately 130 minutes after you have finished using the site.

When you complete an application form using this site and save the form, your data is stored in your browser in a facility called Local Storage. Data in local storage can be cleared out using the same facility in your browser that you use for removing temporary content like images and cookies.