Extra over (EO)
‘Extra over’ (EO) is a term that is often used when taking off for a bill of quantities (BoQ). Taking off is the process of identifying elements of construction works that can be measured and priced.
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.
[edit] Related articles on Designing Buildings Wiki
Featured articles and news
2023 HSE data on workplace injuries and ill health
And CIOB's response.
Building Safety Act and Secondary Legislation
Presidential update from CIAT's Eddie Weir PCIAT.
Starting pistol Statement for an election campaign?
Rates freeze, NI cuts, full expensing; early election?
Positive pressure or positive input ventilation
Could this be a remedy for condensation, damp or mould?
Unlocking a Healthier Tomorrow
Report on Social housing retrofit in Scotland 2023
Call for ministerial group and National Retrofit Delivery Plan.
The Great Transformation 1860–1920. Book review.
2023 Autumn Statement in brief with reactions
Including the devolved governments, CIOB, ECA, APM and IHBC.
Irish Life Sciences HQ, an exemplar of adaptive reuse
AT awards small to medium size project category winner.
Formal and informal adaptive re-use or new use of buildings.
Broken Record. Emissions Gap Report 2023
Temperatures hit new highs, yet world fails to cut emissions (again).
Environment Agency cuts waste red tape
No longer enforcing certain waste transfer documentation.
APM Project Management Awards 2023
Winners reactions during the event at the Park Plaza Hotel.
BSRIA Living Laboratory Innovation Challenge
An exciting opportunity for stakeholders to collaborate.
Discussing issues related to inside and outside air quality
Report from the BSRIA Briefing 2023, Cleaner Air, Better Tomorrow.
Comments
good explanation