Principal works in the construction industry
According to approved document L of the building regulations, the term 'principal works' means:
| ...the work necessary to achieve the client's purposes in extending the building and/or increasing the installed capacity of any fixed building services. The value of the principal works is the basis for determining a reasonable provision of consequential improvements. |
Where, fixed building services are internal or external lighting systems (not emergency escape lighting or specialist process lighting), fixed systems for heating, domestic hot water, air conditioning or mechanical ventilation, or any combination of those systems.
And, consequential improvements are efficiency improvements consequential to changes to a building, required by regulation 28 of the Building Regulations to make the whole building comply with Part L of the Building Regulations.
[edit] Find out more
[edit] Related articles on Designing Buildings Wiki
Featured articles and news
Tapping technology to boost infrastructure and create jobs.
4 ways to ensure certificates are valid.
White elephant construction projects.
How Paul Williams bent over backwards to overcome racial barriers.
CLC SOP recommendations updated
Organisation revises actions around dealing with COVID-19.
CIOB, NFCC, RIBA, RICS call for changes ahead of Building Safety Bill.
Options for carbon neutral homes
Developments in the Future Homes Standard.
An American chimney feature with a colourful past.
Homes based on need, not ability to pay.
Historic England adds 216 entries to the 'at risk' register.
Post-pandemic transport predictions
Will cycling and walking provisions be preserved?
Assembly point levels range from relative to ultimate.
Anticipating a brighter outlook
Signs are pointing to a recovery for the construction industry.
Campaigning to change perceptions about American Brutalism.