20 Things You Can Do Without Planning Permission


When taking on a substantial home improvement project, it’s always good to ask yourself ‘Do I need planning permission for this?’ Some substantial works will need planning permission but there are many smaller projects that you can do without approval from the planners.

These projects are classed as Permitted Development (PD), meaning that there is an implied consent to carry them out. It should be noted that there are limitations to PD rights, especially if you live in a Conservation Area (or similar), a listed building or if you have already undertaken a number of improvements to your home, so do check

Do I Need Planning Permission?

If you are building from scratch, planning a large extension or making improvements to a listed building (or a property in a AONB, or other specially designated area) then you will need planning permission. Our complete guide to planning permission will guide you through the process.

But for smaller home improvements, like those listed below, it is likely that you can complete these under Permitted Development.

You should always check with your Local Planning Authority to ensure you do not require planning permission, as in some cases PD rights may have been restricted or removed.

  1. Internal remodelling
  2. Windows and doors
  3. Garages and attached buildings
  4. Single storey extensions
  5. Rooflights
  6. Loft conversions
  7. Two storey extensions
  8. Conservatories
  9. Sheds and outbuildings
  10. Converting two homes into one
  11. Porches
  12. Gates, walls and fences
  13. Decking
  14. Swimming pools
  15. Adding vehicular access
  16. Cladding and exteriors
  17. Solar panels
  18. Basements
  19. Parking
  20. Change of use to residential (school, church, barn, mill etc. conversions)

1. Does an Interior Remodel Need Planning Permission?

Remodelling the interior is a great way to add more space to your home and can often be done within PD, especially if your proposed work does not require you to extend the overall footprint of the dwelling.

While you won’t need planning permission, you will need Building Regulations approval on structural elements and electrical works.

2. Do I Need Planning Permission to Move/Add Windows & Doors?

In normal circumstances, you can replace or add new windows in the original walls of your house without needing planning approval. However, you may need planning permission if conditions were attached to the original permission. Check with your local authority if you are unsure if there are any conditions attached or what they are.

(MORE: Our Guide to Choosing Windows)

As long as your building isn’t listed, you should be able to install double glazing under PD, but do remember that for new or bigger windows or doors, you will need to follow Building Regulations guidance. Bear in mind that bay windows are classed as extensions.

Planning permission to insert a new window or door opening is not required as long as any upper floor windows on the side elevation are glazed with obscured glass (level 4 or 5 obscurity). They must also be fixed into a non-opening frame (unless the opener is more than 1.7m above the floor of the room in which the window is installed).

3. Do I Need Planning Permission to Convert a Garage?

Converting an attached building, like an integral garage, into living space also falls under PD as you are not increasing the overall footprint of the building.

Converting a standalone garage will involve applying for a change of use under Building Regulations.

(MORE: Ultimate Guide to Taking on a Garage Conversion)

4. How Big Can a Single-Storey Extension be Without Planning Permission?

As long as you stay within the below parameters, you can build a single-storey extension without needing planning permission:

  • The extension does not sit forward of the principal elevation
  • Materials should be similar
  • Where it is within 2m of any boundary, the eaves cannot be higher than 3m, and no more than 4m in height otherwise
  • Rear extensions — no more than 4m in depth (detached house) or 3m in depth (semi-detached or terrace)
  • Side extensions — the width of the extension must not be greater than half the width of the original dwelling. Side extensions are not permitted on Article 1(5) Land (e.g. AONB, Conservation Areas)

See the planningportal.gov.uk for a full list of caveats.

5. Do I Need Planning Permission to Add Rooflights?

Under PD you can make alterations to the roof of a dwelling, like the introduction of rooflights, as long as they do not project more than 15cm from the roof slope.

If the rooflights would extend forward of the roof plane on the elevation fronting a highway then they are not permitted under PD.

It is worth noting that rooflights are not permitted on a dwelling which is located in a Conservation Area or an Area of Outstanding Natural Beauty.

(MORE: Rooflight Buyer’s Guide)

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6. If I Convert my Loft, Do I Need Planning Permission?

Additional space can also be achieved through a loft conversion, without the need for planning consent. While there are limitations on the cubic content allowed under PD, generally, up to 40m³ is fine.

When it comes to additional headroom in the loft space, PD allows for the construction of dormer windows. But, they must not sit higher than the highest part of the existing roof, or extend forward of the roof plane on the principal elevation.

7. Do I Need Planning Permission for a Two Storey Extension?

You can add a two storey extension to your home under PD, providing it is at the rear of the dwelling (this includes adding a second storey onto an existing single storey part of the house).

In addition, your two storey extension must not exceed 3m in depth or be within 7m of the rear boundary. Specific restrictions also apply to the glazed nature of windows in such extensions.

8. Does Adding a Conservatory Need Planning Permission?

Similar to single storey extensions, conservatories and orangeries fall under the same restrictions and can be added under PD. Check the rules about single storey extensions above.

9. If I Add a Shed or Outbuilding, Do I Need Planning Permission?

There may be opportunity to build multiple outbuildings under PD, providing the total area covered by such buildings/enclosures does not exceed 50% of the total area of the curtilage. This 50% should take into account any extensions, but not the area covered by the main house.

  • Outbuildings cannot sit forward of the principal elevation
  • There are height restrictions depending on the type of roof (4m for dual pitch roofs, 3m for other roofs, and 2.5m when the building is within 2m of the boundary)
  • Outbuildings may only be single storey, with the maximum eaves height remaining at 2.5m
  • Outbuildings under PD cannot be used for residential accommodation, e.g. bedrooms or an annexe, but can be used to provide a place to work from home.

(MORE: Creating an Outbuilding or Garden Room)

10. I Want to Convert Two Homes into One – Do I Need Planning Permission?

Converting a pair of semis or two flats, into one property can usually be done under PD and can be a great way of generating extra space without having to move.

Unfortunately, the same rules do not apply if you are dividing a single property into two dwellings. For this you would need to apply for planning permission.

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11. If I Add a Porch, Do I Need Planning Permission?

As long as your new porch conforms with the criteria below, you don’t need planning permission.

  • No part of the porch can be taller than 3m
  • It cannot be within 2m of any boundary adjacent to a highway
  • The ground area (measured externally) does not exceed 3m².

(MORE: Ten Great Porches)

12. Does Adding Gates, Walls and Fences Need Planning Permission?

Permitted Development facilitates the erection, construction, maintenance, improvement or alteration to a gate, fence, wall or other means of enclosure, providing such work stays within the following limitations:

  • The height would not exceed 1m when adjacent to a highway
  • The height would not exceed 2m for any other gate, fence etc
  • Such development is not permitted under PD around a listed building

13. Do I Need Planning Permission for New Garden Decking?

As long as the height falls below 300mm, garden decking and other similar structures can be built without planning permission, as long as certain criteria are met (available at planningportal.co.uk).

14. Do I Need Planning Permission to Build a Swimming Pool?

Under your Permitted Development rights you can build a swimming pool within your garden, provided that the total area covered by the pool does not exceed 50% of the area of the garden curtilage.

15. Do I Need Planning Permission to Create New Access?

This will depend on the classification of the road you are looking to create access from/to. Creating a new vehicular access onto an unclassified road can be done under PD, but you will need planning permission to create accesses onto classified roads.

For a new access onto a classified road, you will need to ensure sufficient visibility when leaving the site, as well as enough turning space to allow you to enter and exit in a forward gear.

Doing Up a Property to Sell?

It might be best to obtain a Certificate of Lawful Development from your local authority, confirming the project falls within PD.  An application usually costs around £75.

(MORE: How to Renovate for Profit)

16. Do I Need Planning Permission to Change/Add Cladding?

Cladding (stone, pebble dash, render, timber, etc.) changes may fall under PD, but is not permitted under PD on any dwelling house located on Article 1(5) land (this includes special areas, like an AONB, National Park, World Heritage site or Conservation Area).

(MORE: How to Choose the Right Cladding )

17. I Want to Add Solar Panels – Do I Need Planning Permission?

Solar panels can be added under PD, providing they do not protrude more than 200mm beyond the plane of the wall or roof, and that the highest part of the panel is not higher than the highest part of the roof (excluding the chimney).

Free-standing panels can also be developed, but are limited in size and proximity to the boundary.

Limitations will apply in Conservation Areas and on listed buildings.

18. Do I Need Planning Permission to Add a Basement?

In a recent appeal decision, it was considered that basements could be PD under Class A of the General Permitted Development Order (GPDO). However, bear in mind that PD does not allow for engineering works.

19. If I Add/Create Parking Spaces, Will I Need Planning Permission?

Class F of the GPDO refers to the provision of hard surfaces, such as parking areas.

These are permitted under PD providing that:

20. Do I Need Planning Permission When Converting Industrial/Commercial Buildings?

It is possible to convert an industrial, commercial or agricultural building for residential use, without the need for planning permission. As is often the case, you will require approval for Listed Buildings and in Conservation Areas.

You will also need to follow the Prior Notification procedure if you are converting an agricultural building such as a barn.

It must be noted also that Scotland, Wales and Northern Ireland each benefit from their own version of these rules, so it is always best to check with the relevant planning authority.

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