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] Related articles on Designing Buildings Wiki
Featured articles and news
Inclusive walking and cycling infrastructure
Design needs to be more diverse to be widely accessible.
Partnership and statutory listing
It’s not always a case of the centre leading.
Excel add-on calculates embodied carbon of designs
PHribbon toolbar developed for US market.
CIOB consultation seeks feedback on APPG 2020 report.
How to respond to changes made in the October 2021 update.
Resource provides professional installation assistance.
Protecting water supplies in the South East
Adaptive planning proposal spans 15 years.
An update on Construction Products Regulation
Activities summarised by the Construction Industry Council.
How Islamic architecture shaped Europe. Book review.