A Building Company With Integrity

Projects You Can Complete Without Planning Permission

28th May 2019/Design

Permitted Development:



(Renovations without planning permission)

For those of you who are looking to refurbish an existing building, it may be interesting to discover just how much you can achieve without going through the planning permission approval process.

Small alterations to your house you may not require planning permission. Work that doesn’t require planning permission is referred to as permitted development.

Unsure whether you need planning permission or not?

You can apply online for a certificate of lawfulness. This will give you a decision on whether you require planning permission for a proposed use or building works. Additionally, you may still require to apply for a building warrant even if planning permission is not required.

Permitted development allows you to alter the internal space within an existing part of your property as long as you are not increasing the overall footprint.

Below we’ve listed some building projects that may not need planning permission if they meet the rules for being permitted developments:

  • Adding a porch to your house
  • Adding an access ramp to your house
  • Remodelling the interior
  • Enlarging a roof by adding a dormer
  • Altering the outside of your house or flat
  • Building a shed, garage or greenhouse
  • Laying a hard surface outside your house, or replacing a hard surface you already have (patio or driveway)
  • Building a gate, fence or wall around your house or flat

(However, you should still check that your own individual project /adjustments meet the rules for permitted development.)

Remodelling your interior:

As long as you’re not extending the overall footprint of your home, permitted development (PD) allows you to carry out interior remodelling – such as demolishing interior walls to create an open-plan layout – without obtaining planning permission. However, you’ll still need to stick to building regulations guidance for some parts of the work, such as structural and electrical changes.


Roof-lights can be added to your home without planning permission, providing they don’t project more than 15cm from the roof slope.

Adding new windows without planning permission:

Double-glazing can be installed without planning permission, as long as your property isn’t listed. If you’re planning to add new or bigger windows or doors, you’ll need to follow building regulations.

Any new windows facing the sides of your property must have obscured glass and cannot open unless they’re more than 1.7m above the floor.

It should be noted that any new bay windows are classed as extensions.


An addition or extension to your house is generally considered to be permitted development so long as your extension meets the legalities below.

Single-storey extensions

Planning permission is not need, so long as:

If your extension will have one storey, you don’t need planning permission as long as:

– it’s located at the back of the house

– it doesn’t go back further than 3 metres if it’s a terraced house, or 4 metres if it isn’t

– the height of the eaves (where the wall meets the roof) is no higher than 3 metres

– it’s not higher than 4 metres, including sloping roofs

– it doesn’t cover more floor area than your house does

– it doesn’t take up half the ‘curtilage’ – the grounds behind your home

– it isn’t within a conservation area

Multi-storey extensions

Again, planning permission is not required as long as:
– it’s located at the back of the house
– there’s at least 10 metres between the extension and the boundaries of your grounds
– it isn’t higher than your house (excluding chimneys)
– it doesn’t cover more floor area than your original house does
– it doesn’t take up half the ‘curtilage’ – the grounds behind your home
– it isn’t within a conservation area

Solar Panels:

Solar panels do not require planning permission unless you live in a listed property.

Renovation, Building, Extension

(Solar panels)

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