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A roof window (or skylight) is fitted flush within the slope of a roof, while a dormer projects outward, creating additional headroom and floor space.
Both can be installed under permitted development but must meet specific size and position limits to qualify.
Also consider building regulations for a new dormer, find out more on Planning Portal
You will not need planning permission if a new or replacement driveway of any size uses permeable (or porous) surfacing which allows water to drain through, or if the rainwater is directed to a lawn or border to drain naturally.
If the surface to be covered is more than five square metres planning permission will be needed for laying traditional, impermeable driveways that do not provide for the water to run to a permeable area.
This guidance applies to houses, there are different rules for flats and maisonettes, converted houses, new houses or areas where there permitted development rights may be restricted.
Read about paving your front garden
You may need to consider if a dropped kerb is required, largely dropped kerbs are not a planning matter but you will need to apply to your local council.
Find out more about dropped kerbs
Whether raising the height of an external door requires planning permission depends on the location of the door, location of the property and how drastic the height change will be.
For smaller changes to the side and rear of the property, permitted development rights may apply, meaning no application or planning permission is required.
Where the height change will be substantial and have a significant impact on the building’s appearance, planning permission is likely to be required. Especially in cases where the door to be heightened is on the principal elevation of the property.
Principle elevation - The most visible or prominent side of a structure, typically facing a street or public area. While often considered the 'front' of the building, it may not always contain the main entrance.
In designated areas such as conservation areas, or on listed buildings you may require additional approvals such as listed building consent.
If you believe permitted development rights apply to a small change, you can apply for a lawful development certificate to ensure this is the case.
Building regulations 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.
Planning permission is not required to move an internal doorway, provided it does not impact the external appearance of the building. If the building is listed, you will require listed building consent for any changes to the building.
Building regulations may apply if the wall is load bearing or is part of a fire escape route.
Read more about windows and doors from our common projects.
Work that requires building control approval will require a completion notice to be submitted to the building control body. The completion notice must be sent within five days of the work being completed, once submitted, the building control body can visit the site to complete a final inspection.
If the work meets the required standards they will issue a completion certificate.
If you plan to put up a small, detached building like a garden shed, garden room, garden office, annexe or summerhouse (all classed as outbuildings), building regulations generally won’t apply if the building has a floor area under 15 square metres and does not include any sleeping accommodation.
For buildings with a floor area between 15 and 30 square metres, building regulations approval is usually not needed - as long as the building does not include sleeping accommodation and either:
Read more about the building regulations that apply to outbuildings.
Don't forget to check the permitted development rights for outbuildings.