Do I need building control approval for internal alterations?
Not all internal alternations need Building Regulations approval.
However, the basic rule of thumb is that if the work involves load-bearing walls, chimneys, fireplaces or walls around staircases then any alteration will require inspection and approval from your local building control team. So talk to them as soon as you can.
Why is building control important in the first place? Find out more here.
On the other hand, if you're carrying out minor alterations such as replacing roofing tiles with the same type and weight of tile; replacing the felt to a flat roof; re-pointing brickwork; or replacing floorboards you may not need the work signed off by your local building control team.
Watch our video on internal alterations to the layout or structure of your home
Here's a selection of common internal alterations and the steps you'll need to take before carrying them out:
- Video on alterations to the layout or structure of your home
- Building, removing or altering walls
- Replacing windows
- Bay windows and chimneys
Building, removing or altering walls
- Internal walls have a number of functions: some keep the ceiling and upper floors up, some are there to help you escape from your home if there was a fire and others simply divide up space.
- Load-bearing walls are fundamental to the structure of your home and you should seek professional advice before you alter, build or remove them. When removing a load-bearing wall a structural engineer considers the loads on the wall and will design a beam and other supporting structures to safely transmit the loads to the ground.
- Walls around staircases offer fire protection, allowing you to escape in the event of a fire, so altering these walls will mean you will probably need to take other measures such as fitting smoke alarms or upstairs windows suitable for fire escape to compensate.
Generally, you can carry out window repairs such as replacing broken glass, fogged double-glazing, rotten sashes and rotten sections of the frame without seeking building regulations approval.
But if you live in a conservation area, an area of outstanding natural beauty or if your home is listed, then you will need to get building regulations approval (and possibly planning permission too) for almost any glazing work – so check with your local building control team.
Fully replacing windows would usually require building regulations approval, but you can carry out most work using a registered competent person installer. They will carry out the work to the correct standards and provide you with all the relevant certificates on completion. More information can be found in our section on the Competent Person Scheme at Competent Persons Schemes.
Bay windows and chimneys
Bay windows and chimneys are usually load-bearing, so any alterations to them will need building regulations approval and you should seek expert advice from a structural engineer or builder before carrying out work.
If you want to remove a chimney breast, a structural engineer or architect will be able to assess the strength of the party or gable wall, chimney flue thickness and height to work out what kind of supporting measures to install in its place.
Working chimneys may require a flue liner or renovating to prevent smoke leaking into rooms and you should sweep them regularly to keep them working efficiently.
If you plan to install a new wood-burning stove it's important to follow the correct installation procedures.
More information on chimney repairs along with a register of competent contractors can be found at the National Association of Chimney Engineers.
Was this page helpful? Take a look at our other popular guides
- Loft conversions
- Garage conversions
- Internal alterations
- Why is building control important?
- A to Z of building control