- Project plans
- Project activities
- Legislation and standards
- Industry context
Last edited 03 May 2020
The term ‘on site’ (or on-site) typically refers to work which is carried out on the construction site itself. This is as opposed to ‘off-site’ which is generally associated with prefabrication or pre-assembly techniques. For more information see: Offsite construction.
Generally, on-site construction techniques tend to be more labour and time intensive, and they may have lower quality due to the complexities of working in an uncontrolled environment, subject to weather and other changeable conditions, space and access restrictions and so on. However, they can be more flexible in response to changes that may arise on site.
See also: In situ.
On site may also refer to the storage of materials. This is as opposed to off site materials, where the client has paid for materials, but they have yet to be delivered to site. The client may do this to ‘reserve’ the items, protecting the programme, but this does put the client at risk, for example if the contractor becomes insolvent and the items are then not delivered, even though payment has been made. For more information see: Off site materials.
On site may also refer to the generation of heat and / or power. Localised, point generation of heat and power provides an independent, responsive, sustainable method of supply. On-site generation can include renewable energy technologies, such as photovoltaics, anaerobic digestion, wind turbines, water turbines, combined heat and power (CHP) and so on. For more information see: On site generation of heat and power.
The feed-in tariff scheme allows consumers who generate their own electricity from a renewable or low-carbon source to qualify for a payment for each unit of electricity generated. Consumers can also qualify for an ‘export tariff’ by selling surplus electricity back to their supplier. For more information see: Feed-in tariff.
 Related articles on Designing Buildings Wiki
Featured articles and news
Discover the Winchester Mystery House.
Priorities for rail in the Midlands and the North.
Examining renovate-operate-transfer arrangements.
Proactive measures to secure property during extreme times.
Safety guidance from BSI released; comments requested.
Scour can make river currents structurally damaging.
Indoor environmental quality looks at air quality and other wellbeing factors.
A procurement method associated with Public Private Partnerships.
Infrastructure can use digital technology to encourage human growth.
Robotics and the construction industry.
ECA comments on CLC's three-phase recovery plan.
Their diplomatic and architectural history.
The origins of the six volume series.
Built to defend British waters, only to serve as pirate radio stations later.
Wellbeing to influence mix of home and office based working.
An introduction to cobotics.