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If a heating system or hot water system is to be replaced then an application may not be required, and, if it is required, it may not be necessary to apply in advance of carrying out the work.
Where more than 25 per cent of a ceiling below a cold loft space or flat roof is being replaced then building regulations would normally apply, and the thermal insulation of that ceiling would normally have to be improved.
The building regulations may apply to certain changes of use of an existing building even though you may think that the work involved in the project will not amount to 'Building Work'.
Demolition is dealt with under the Building Act 1984. Generally, it requires six weeks prior notice to be given to the Local Authority Building Control before demolition begins.
Work to refit a kitchen or bathroom with new units and fittings does not generally require building regulations approval, although drainage or electrical works that form part of the refit may require approval under the building regulations.
If you are carrying out electrical work and fixing lighting to the outside of your house in England and Wales, you will have to follow new building regulations rules.
The 'Low or Zero Carbon Energy Sources: Strategic Guide (LZC)' supports the inclusion of low or zero carbon energy sources in Part L of the Building Regulation and Approved Documents L1A, L1B, L2A and 2B. Chapter 4 deals with micro-CHP.
If you want to put up small detached buildings such as a garden shed or summerhouse in your garden, building regulations will not normally apply if the floor area of the building is less than 15 square metres and contains no sleeping accommodation.
If you want to carry out repairs on or re-cover less than 25 per cent of the area of a pitch or flat roof, you will not normally need to submit a building regulations application.
The regulations define converting a home into a shop as a 'material change of use' and specify the requirements with which, as a result of that change of use, the building, or the relevant part of the building, must comply.