Budget for building design and construction projects
A budget is a statement of the amount of money that is available to spend over a period of time, or on a specific thing, such as a building. It may include an outline plan for how that money will be spent, and a breakdown of the items it will be spent on.
The CIOB Code of practice for project management 4th edition, defines a budget as:
'Quantification of resources needed to achieve a task by a set time, within which the task owners are required to work... a budget consists of a financial and/or quantitative statement, prepared and approved prior to a defined period, for the purpose of attaining a given objective for that period.'
Budgets for construction projects help determine what is affordable and should be set as early as possible. It is important that they are based on evidence and are realistic.
The RIBA Plan of Work 2013 defines the project budget as; 'The client’s budget for the project, which may include the construction cost as well as the cost of certain items required post -completion and during the project’s operational use.'
A project budget can be established by:
- Assessment of projected income and expenses through the life of the project.
- Comparison with similar projects.
- Assessment of the funds available.
- Pre-design analysis of requirements.
- Analysis of preliminary design options.
The project budget is set by the client and is distinct from cost plans prepared by a cost consultant which are likely to focus on the construction cost.
The client's total project budget may include:
- The construction cost.
- Land or property acquisition.
- Approvals fees.
- Planning costs (Section 106 Agreement or Community Infrastructure Levy).
- Financing costs.
- Site investigations.
- Fixtures, fittings and equipment.
- The cost of decanting and relocating, including costs associated with moving staff.
- Contracts outside of the main works.
- Insurance.
- Consultant fees.
- Inflation.
- Contingency.
- VAT.
It is common on projects that the project budget and the project brief diverge over time and it is for this reason that careful cost control is important.
It is important that the client makes clear what costs should be monitored by the cost consultant and what will remain within the control of the client organisation.
NB: NRM 1 defines the authorised budget (sometimes referred to as the approved estimate or cost limit) as; 'the maximum expenditure that the employer is prepared to make in relation to the completed building.'
NB: In the case of Riva Properties Ltd & Ors v Foster + Partners Ltd [2017], the Technology and Construction Court (TCC) found that Foster + Partners had been negligent in failing to design a hotel that could be constructed within Riva Properties budget, and then suggesting that it could be value engineered down to the budget after planning permission had been granted. Foster + Partners were held liable for client's costs of £3.6 million in developing the scheme which was almost £100 million over the budget.
Stephen Homer, a partner at Ashfords LLP, the lawyers that acted for Riva Properties said; "This case serves as a warning to designers that they cannot design in a vacuum. Cost and budget is a key constraint and should always be identified and considered when designing any project, even when the provision of cost advice is expressly excluded from the designer’s obligations."
[edit] Related articles on Designing Buildings
- Accounting.
- Approximate quantities cost plan.
- Benchmarking.
- Best value.
- Bills of quantities.
- Business case.
- Business plan.
- Capital.
- Capital allowances.
- Capital costs.
- Capital value.
- Commercial management.
- Contract sum.
- Contract sum analysis.
- Cost.
- Cost certainty.
- Cost consultant.
- Cost control.
- Elemental cost plan.
- Estimate.
- Final account.
- Green budgeting.
- Initial cost appraisals.
- Net Present Value.
- Pre-tender estimate.
- Price certainty.
- Whole-life costs.
Featured articles and news
Future Homes Standard Essentials launched
Future Homes Hub launches new campaign to help the homebuilding sector prepare for the implementation of new building standards.
Building Safety recap February, 2026
Our regular run-down of key building safety related events of the month.
Planning reform: draft NPPF and industry responses.
Last chance to comment on proposed changes to the NPPF.
A Regency palace of colour and sensation. Book review.
Delayed, derailed and devalued
How the UK’s planning crisis is undermining British manufacturing.
How much does it cost to build a house?
A brief run down of key considerations from a London based practice.
The need for a National construction careers campaign
Highlighted by CIOB to cut unemployment, reduce skills gap and deliver on housing and infrastructure ambitions.
AI-Driven automation; reducing time, enhancing compliance
Sustainability; not just compliance but rethinking design, material selection, and the supply chains to support them.
Climate Resilience and Adaptation In the Built Environment
New CIOB Technical Information Sheet by Colin Booth, Professor of Smart and Sustainable Infrastructure.
Turning Enquiries into Profitable Construction Projects
Founder of Develop Coaching and author of Building Your Future; Greg Wilkes shares his insights.
IHBC Signpost: Poetry from concrete
Scotland’s fascinating historic concrete and brutalist architecture with the Engine Shed.
Demonstrating that apprenticeships work for business, people and Scotland’s economy.
Scottish parents prioritise construction and apprenticeships
CIOB data released for Scottish Apprenticeship Week shows construction as top potential career path.
From a Green to a White Paper and the proposal of a General Safety Requirement for construction products.
Creativity, conservation and craft at Barley Studio. Book review.
The challenge as PFI agreements come to an end
How construction deals with inherited assets built under long-term contracts.
Skills plan for engineering and building services
Comprehensive industry report highlights persistent skills challenges across the sector.
Choosing the right design team for a D&B Contract
An architect explains the nature and needs of working within this common procurement route.
Statement from the Interim Chief Construction Advisor
Thouria Istephan; Architect and inquiry panel member outlines ongoing work, priorities and next steps.

























Comments
It would be apt to say that the ultimate success of a project manager and the construction company greatly depends on the fact whether their projects are completed on-time and on-budget. Essentially, construction project management is all about keeping track of the
costs at all stages of the project to ensure that you don’t flout the budget considerations.