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Buildability meaning

What does Buildability mean?
In legal practice, buildability (also called constructability) describes how readily a proposed design can be constructed on site to achieve the required time, cost and quality outcomes. It is not defined in legislation or case law; it is a descriptive term used across construction contracts and procurement in England & Wales, Scotland, Northern Ireland and Ireland. Buildability considerations inform allocation of risk and responsibility for design, construction methodology and sequencing. Under design and build procurement, the contractor typically assumes responsibility for delivering a buildable design that meets the employer’s requirements. Under traditional procurement, designers owe a duty to exercise reasonable skill and care to produce designs capable of being built using ordinary methods with reference to site constraints, access, temporary works and foreseeable construction risks. Poor buildability can lead to variations, delay and disruption, extensions of time, loss and expense, and allegations of design defects or professional negligence. It is commonly addressed through employer’s requirements, tender queries, constructability reviews, value engineering and early contractor involvement. Health and safety duties overlap: CDM 2015 (GB), CDM (NI) 2016 and the Irish 2013 Regulations require designers to eliminate, reduce and control construction risks so far as reasonably practicable, which includes buildability. Early assessment improves programme...
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View the related Practice Notes about Buildability

PRACTICE NOTES
Construction Law Glossary: Key 'B' Terms—bonds, BIM, BREEAM, Building Safety Act 2022, Building Regulations, benchmarking, bills of quantities

A B C D E F G H I J K L M N O P Q R S T U V W X Y Z Back end Contentious, disputes‑focussed legal services, for instance representing a party in litigation... Benchmarking A method for assessing whether service quality and pricing align with prevailing market levels (where they exist) without running a formal competition. It can also be applied to track improvement or evaluate performance... Best value The obligation on every local authority to arrange for continual improvement in how its functions are carried out, having regard to economy, efficiency and effectiveness (Local Government Act 1999, s 3). This entails considering costs, securing value for money, and ensuring services reflect community needs and the authority’s priorities. See Practice Note: Best value in public procurement... Bid bond Also called a tender bond (or guarantee). Used within the tender process to secure performance by bidding contractors, most commonly on international projects...

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PRACTICE NOTES
BIM in Construction Projects: Benefits, Risks, and Contractual and Procurement Implications (including PAS 1192-2 and COBie)

Advantages of BIM BIM is expected to cut capital expenditure as well as the whole‑life cost of buildings. Co‑ordination and buildability issues can be resolved during design, preventing delays and extra cost if discovered during construction. The virtual model allows swift, low‑cost exploration of the effects of proposed design changes. It generates 3D imagery, making the finished asset simpler to visualise. The model can be simulated and analysed to reveal insights into anticipated running costs. Design information—such as specifications and other technical data—is embedded within the model, keeping it easy to access. ...

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PRACTICE NOTES
Two-stage tendering in construction: legal and practical overview of stages, use of PCSAs, open-book pricing, risk allocation, and advantages and disadvantages versus single-stage tendering

This Practice Note sets out the ‘two-stage tendering’ method widely adopted to procure building schemes. Many clients opt for two-stage tendering to bring a contractor on board sooner. It allows the client and the chosen contractor to collaborate in the second phase, with the contractor contributing to design, buildability and value engineering, while firming up the final price for the works. Two-stage tendering is most often applied when letting lump sum contracts, in both traditional and design and build procurement. How does it differ from traditional single stage tendering? Two-stage tendering is increasingly favoured as an alternative to the classic single stage route. Under single stage tendering, contractors submit a bid for the scheme on the basis of a design illustrated by drawings and a specification or, for design and build, the employer’s requirements and an agreed programme. After reviewing the returns, the employer selects the contractor it intends to appoint and with whom it will enter the building contract. As a result, the contractor typically has no...

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