Agent
An agent is an individual, group or company authorised to act on behalf of some other individual, group or company for a specific purpose and usually for a specific time period. The agent normally takes an active or leading role in attempting to bring about the client's desired objectives.
For example:
- An estate agent will try to sell a client's property at the best possible price and may even be involved in finding a replacement property.
- In construction, a site agent will normally be responsible for inspecting construction works as they proceed on behalf of a client, identifying problems with and providing solutions for to ensure project costs are controlled.
- An employer's agent is an agent acting on behalf of a client as the contract administrator for design and build contracts.
- A client's agent or client's representative cna be responsible for managing a project on behalf of a client.
- A letting agent who manages the letting of a development on behalf of a developer.
NB The term 'sub-agent' can be used to refer to an individual or organisation appointed on large construction projects to manage a specific part of the works or a specific package of work.
The New Homes Quality Board Glossary of the terms used in the Code and Guidance, published by The New Homes Quality Board in 2021, defines an agent/s as: ‘a person, firm or company used by a Developer to deal with any matter on their behalf (for example, an estate agent or contractor).
Roles in construction projects: analysis and terminology, by Hughes, W. and Murdoch, J. R, published in 2001 by the University of Reading, defines an agent as: ‘A basic term referring to someone who represents another. Usually qualified by preceding it with the name of the person or organization represented. On its own, a very ambiguous term.’
[edit] Related articles on Designing Buildings
Featured articles and news
A safe energy transition – ECA launches a new Charter
Practical policy actions to speed up low carbon adoption while maintaining installation safety and competency.
Frank Duffy: Researcher and Practitioner
Reflections on achievements and relevance to the wider research and practice communities.
The 2026 Compliance Landscape: Fire doors
Why 'Business as Usual' is a Liability.
Cutting construction carbon footprint by caring for soil
Is construction neglecting one of the planet’s most powerful carbon stores and one of our greatest natural climate allies.
ARCHITECTURE: How's it progressing?
Archiblogger posing questions of a historical and contextual nature.
The roofscape of Hampstead Garden Suburb
Residents, architects and roofers need to understand detailing.
Homes, landlords. tenants and the new housing standards
What will it all mean?
The Architectural Technology podcast: Where it's AT
Catch-up on the latest episodes.
Edmundson Apprentice of the Year award 2026
Entries now open for this Electrical Contractors' Association award.
Traditional blue-grey slate from one of the oldest and largest UK slate quarries down in Cornwall.
There are plenty of sources with the potential to be redeveloped.
Change of use legislation breaths new life into buildings
A run down on Class MA of the General Permitted Development Order.
Solar generation in the historic environment
Success requires understanding each site in detail.
Level 6 Design, Construction and Management BSc
CIOB launches first-ever degree programme to develop the next generation of construction leaders.
Open for business as of April, with its 2026 prospectus and new pipeline of housing schemes.
The operational value of workforce health
Keeping projects moving. Incorporating unplanned absence and the importance of health, in operations.





















