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I’m replacing a window, do I need planning permission or building control approval increase its size?
Increasing the size of a window will often fall under permitted development rights, meaning an application for planning permission is not required to make the change, provided limits and conditions are met.
Any new window must be of similar appearance to the original which you are replacing.
Permitted development rights do not apply to flats. To increase the size of a window in a flat or maisonette you will require planning permission.
If you live in a listed building, you will require listed building consent for any major changes.
Where the work has as significant impact on the external appearance of the house, especially on the principal elevation, planning permission may be required.
Building control approval will likely be required where the change impacts the structure of a building, this primarily occurs when an opening Is widened. When altering walls you may want to consult a structural engineer.
Building control will also consider energy efficiency, glazing, ventilation and fire safety.
Common Questions
Planning permission is not required to remove an internal chimney breast as the change does not impact the exterior of the house. Rules may differ if you are planning on removing the chimney stack, or if you are in a conservation area.
If you live in a listed building, then you will need to apply for listed building consent for any major changes to the building.
Building regulations approval will always apply when removing chimney breasts as they are part of the building’s structure. You should seek advice from a structural engineer who will provide drawings and calculations that can be submitted as part of your application.
Widening or creating a new external doorway will likely fall under permitted development rights, meaning an application for planning permission is not required provided you meet limits and conditions set out in legislation. If the change is on the side or rear of the building it is more likely to comply with planning regulations.
If you live in a listed building, you will have to apply for listed building consent for any significant works, whether internal or external.
New external doorways which create a new or widened opening must comply with building regulations as they may impact the structure of a building.
You likely will require advertisement consent to display a commercial advertisement outside your home, especially when the company does not operate from that location.
It is more likely that permission will be required where:
- the sign is over 0.3 square metres or illuminated
- the sign is visible from a road
- the building is listed or in a designated area then consent
Find out more about advertisement consent on Planning Portal.
If you carry out development without the necessary planning permission, and it doesn’t fall within permitted development rights, you may be in breach of the planning rules. In such cases, you will usually need to submit a retrospective planning application to seek approval for the work already completed or started. However, there is no guarantee that permission will be granted.
Learn more about planning breaches on Planning Portal
Once submitted, your planning application first goes through a validation process. After its validated, the formal decision period is 8 weeks. However, in some cases, especially for more complex proposals or if further information is needed, your local authority may request an extension of time.
Understand more about the decision-making process on Planning Portal
