Preliminary contracts in the construction industry
In law, a preliminary contract typically aims to prevent the parties to a contract from entering (at a later stage) into a similar legal arrangement with third parties. In order to confirm that that they will not do so, parties will sign a preliminary contract.
Preliminary contracts are more common in Europe when buying land or property, especially when reserving property off-plan. Buying off-plan can be an uncertain process as a buyer commits to a property purely on the basis of drawings (plans) before any construction has taken place.
Preliminary contracts serve as a formal confirmation of reservation and may have more legal power than a deposit on its own. But they are formulated to secure the commitment of buyers rather than compelling developers to stick to their side of the bargain. Furthermore, a preliminary contract may not compel a developer to sell the property that is the subject of the contract.
Prior to signing the preliminary contract, potential buyers are advised to check how far the development has progressed and whether the developer or contractor is still in a position to start construction work. A further point to note is whether the work (if started) is in accordance with the plans. Some large developers can provide buyers with a degree of certainty but this may not be the case with all developers.
Preliminary contracts can be useful to potential buyers but they are not a full confirmation of the right to get what has been reserved.
NB The term 'preliminary contract' may also be used to refer to a contract for preliminary works, such as site preparation, setting out, construction of access roads and so on.
[edit] Related articles on Designing Buildings Wiki
- Agreement.
- Bespoke construction contract
- Construction contract conditions
- Contract documents for construction
- Contractual obligation.
- Contractual right.
- Core clause.
- Intermediate building contract
- JCT
- JCT Construction management contract
- Letter of intent.
- Lump sum contract
- NEC3
- Standard form of contract
Featured articles and news
The Home Energy Model and its wrappers
From SAP to HEM, EPC for MEES and FHS assessment wrappers.
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.