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Domestic alterations

We can give advice on lots of domestic building work including loft conversions, electrical safety, replacement windows and doors and exempt buildings.

It is important that you keep to the building regulations.  If you fail to tell the council of work being carried out, you may be committing a criminal offence.  Evidence of Building Regulations approval may also be needed if you wish to sell your house in the future.

A competent persons scheme covers some areas of building work.  If you do use a self-certified contractor, you must make sure they are registered for the work being done. You can find out more and check whether your contractor is registered on the Competent Person RegisterOpens new window website. When the work is finished, they must issue you with a certificate to confirm that the work meets the building regulations.

Even if your building is classed as exempt, you may need to meet Part P of the building regulations, which covers electrical safety


If you require any further information on any area of our service, please contact us on 01792 635636 or email bcon@swansea.gov.uk.

If you are unable to visit the Civic Centre, we will be happy to call at your premises to talk about your application or any queries you may have.  You can arrange a visit by contacting Building Control or using our form to Request a building control visit.

Exempt buildings

There are certain buildings that may be exempt from building regulations. These can include conservatories, porches, domestic garages, small detached buildings or replacement windows.

Guide to extending your home

The guide is divided into chapters that contain advice about typical building projects and it is hoped that when you have read it you will have a better understanding of what is involved in a domestic building project.

Interactive guidance from the Planning Portal

You can use the Planning Portal to find planning and regulations guidance for your building project.

Garage conversions

You will need to apply for Building Regulations approval if you plan to convert a garage.

Loft conversions

You will need to apply for Building Regulations approval if you are going to carry out a loft conversion.

Party Walls

The Party Wall Act provides guidance for preventing and resolving disputes about party walls, boundary walls and excavations near neighbouring buildings.

Replacement windows and doors

All replacement glazing comes under the building regulations. This means that anyone installing replacement windows or doors has to comply with strict thermal performance standards.

Retaining walls

If you are building a wall which is retaining land over 1.5 in height you will need to submit an application. This applies to new retaining walls or extending an existing one.

Electrical works

If you own your home then it is your responsibility to make sure that any electrical works are safe under Part P of the Building Regulations.

Automatic fire suppression (Sprinklers)

From the 1 January 2016 all dwellings and flats newly constructed or formed by a material change of use will require automatic fire suppression in the form of sprinklers.

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