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Conservatories are great extension projects for property owners who want to renovate their home and expand their living space. But, do you need building regulations for a conservatory?

Building regulations are the minimum standards for the construction or alterations to buildings. This differs from planning permission, and your extension project may require both.

Read on to find out more information about the applicable building regulations for your conservatory.

In this guide, we cover:

Do you need building regulations for a conservatory?

Building regulations will apply if you’re adding an extension to your home. However, conservatories are not subject to building regulations approval provided that the extension meets certain requirements.

Conservatory building regulations guidelines

A conservatory is typically exempt from building regulations if it meets several conditions, including:

It’s built at ground level with a floor area of no more than 30 square metres.

  • A minimum of 50% of the new wall and 75% of the roof is glazed or uses translucent material.
    30 square meter limit
  • External quality walls, doors or windows separate the conservatory from the house.
    building regulations for conservatories
  • The glazing and any fixed electrical installations meet the requirements of the applicable building regulations (more on this later).
  • The heating system is independent from your home with separate temperature and on/off controls.
  • When it comes to your conservatory’s foundations, building regulations do not specify any additional conditions you must meet.

If you’re unsure whether your conservatory requires building regulations approval, give us a call. Our team is on hand to help and offer advice around conservatory regulations.

Looking to add a porch to your home? These types of extensions are subject to the same building regulations as conservatories.

If your project needs building regulations approval, you can apply for this through any local authority control department.

When do conservatory building regulations apply?

When creating a new structural opening between a conservatory and the rest of your home, you will need building regulation approval. 

It’s also important to note that conservatories should not restrict ladder access to windows in roofs or loft conversions, especially if any of the windows will be used as a fire escape.

For more information, contact your local building control department.

Energy, electrical and glazing building regulations

Building regulations ensure that extensions are efficient. This means that your conservatory must comply with a number of energy, electrical and glazing regulations, including:

  • The level of glazing in the roof, windows and doors of the original home cannot exceed 25% of the floor area of both the original home and the conservatory combined. You must provide your local building control department with these calculations.
  • The level of glazing in the windows, doors and roof of the conservatory cannot exceed 25% of the floor area of the conservatory. You must provide your local building control department with these calculations.
  • Doors and windows must adhere to current U Values.
  • Glazing in doors and windows must be strengthened or laminated safety glass to meet British Standard 6206. 

To find out more information, visit the building regulations page on Planning Portal.

The information on this page was correct at the time of publishing and is subject to change in line with legislation.