Installation of green roofs

Free planning advice is available for residents if you are considering green roofs or other energy efficiency measures via our Duty Planning Service

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Illustration of a typical green roof layering

Planning policies encourage the inclusion of green roofs wherever possible.

A green roof (or a living roof) is a roof covered in vegetation, planted over a waterproof layer.

Installing a green roof is an excellent way to enhance biodiversity, improve air quality and insulate your home. Green roofs also soak up water when it rains, which relieves the pressure on sewers and can reduce the risk of flooding.

Planning permission

Green roofs do not normally require planning permission. This is because they are considered small-scale householder alterations.

However, if part of an extension to your home, please check with the planning department before you start any works. Also, there may be extra controls if your property is:

Free advice is available from the duty planning officer on planning@lbhf.gov.uk or 020 8753 1081.

Our 'Living with rainwater' guide also includes information on small-scale green roof installation.

Maintenance of green roofs

It is important that green roofs are well-maintained so they continue to work and serve the intended purpose.

When a household extension has a green roof, a planning condition is normally attached for a maintenance plan.

We want to make sure these are easily produced for residents and could simply be a written commitment to carry out various tasks; examples about what to include are listed below:

  • weeding
  • repairing/replanting bare patches
  • checking the drainage system is clear and functioning
  • removing planting which encroaches
  • checking for any evidence of pests
  • fertilising sedum roofs.

Often green roofs are installed by a specialist who, as part of their service, may provide a maintenance plan which could be included as part of an application.

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