- Project plans
- Project activities
- Legislation and standards
- Industry context
- Specialist wikis
Last edited 23 Sep 2020
Extra over (EO)
When taking off for a BoQ, the term ‘extra over’ can be used to refer to items that to a certain extent have already been measured, but have not been priced at the full value of all their labour and materials. A common example of this is when measuring drain pipes, for which the estimator may determine a cost based on the full length of the pipe measured along its centre-line, and then assess an ‘extra over’ cost for the additional cost necessary to pay for fittings such as bends and junctions. So the cost of a section of pipe with a bend is the cost of the length of the pipe plus the extra over cost for the bend.
EO items should be listed directly beneath the main item over which they are measured, as this simplifies the the interpretation of the BoQ by suppliers. If the EO item cannot be listed immediately beneath, reference should be given in its description in the main item it relates to.
 Related articles on Designing Buildings Wiki
Featured articles and news
And CIOB's response.
Presidential update from CIAT's Eddie Weir PCIAT.
Rates freeze, NI cuts, full expensing; early election?
Could this be a remedy for condensation, damp or mould?
Unlocking a Healthier Tomorrow
Call for ministerial group and National Retrofit Delivery Plan.
The Great Transformation 1860–1920. Book review.
Including the devolved governments, CIOB, ECA, APM and IHBC.
AT awards small to medium size project category winner.
Formal and informal adaptive re-use or new use of buildings.
Temperatures hit new highs, yet world fails to cut emissions (again).
No longer enforcing certain waste transfer documentation.
Winners reactions during the event at the Park Plaza Hotel.
An exciting opportunity for stakeholders to collaborate.
Report from the BSRIA Briefing 2023, Cleaner Air, Better Tomorrow.