Expert Guide

How to Win Public Sector Construction Contracts

By James Lopez, Bid Strategy Lead, Glaxtons Consulting

Public sector construction is one of the largest procurement markets in the United Kingdom, with tens of billions of pounds a year flowing through frameworks and direct tenders for new build, refurbishment, civils and maintenance. For contractors, the opportunity is enormous, but the bar on accreditation, safety and social value has risen sharply.

This guide sets out how public sector construction is procured, the frameworks that carry the spend, and what a winning construction bid has to evidence. It is free and applies from main contractors to specialist trades.

1. The major construction frameworks

Most public sector construction runs through frameworks. The Crown Commercial Service CWAS3 framework (RM6320) is the flagship national route, alongside major frameworks such as Pagabo, SCAPE, Procure Partnerships, LHC and regional consortia. Each has its own lot structure, value bands and call-off process, and a place on the right one opens years of mini-competitions.

  • CCS CWAS3 (RM6320) - the national construction works framework
  • Pagabo, SCAPE, Procure Partnerships and LHC - major construction frameworks
  • Regional consortia and local authority frameworks
  • Direct tenders via Find a Tender and Contracts Finder

2. Accreditations that gate construction bids

  • Constructionline, often Gold, and CHAS or an equivalent SSIP
  • ISO 9001, 14001 and 45001
  • Cyber Essentials, increasingly required
  • Trade and product certifications relevant to the works

3. Safety, CDM and the Building Safety Act

Construction bids are scored heavily on health and safety, CDM competence, and, for relevant work, the Building Safety Act regime and the golden thread of building information. Evaluators want specific, current evidence of how you keep people safe and manage information, not a generic safety statement.

4. Social value and local delivery

Construction is where social value is often most heavily weighted, because the work touches local communities directly. Local labour and apprenticeships, local and SME supply chain spend, community engagement, and carbon reduction are all commonly scored. Commit to specific, measurable numbers tied to the project and the local area.

5. What a winning construction bid evidences

  • The right framework positioning and accreditations in place
  • Relevant, quantified project case studies of comparable work
  • Health, safety, CDM and Building Safety Act competence, evidenced
  • A credible programme, resourcing and supply chain plan
  • Specific, measurable social value tied to the project and locality
  • A competitive price that protects margin and reflects real cost

Bidding for a construction contract or framework?

Frequently Asked Questions

How is public sector construction procured?

Most public sector construction runs through frameworks such as CCS CWAS3 (RM6320), Pagabo, SCAPE, Procure Partnerships and LHC, alongside regional consortia and direct tenders. A place on the right framework opens years of mini-competitions.

What accreditations do construction tenders require?

Commonly Constructionline, often Gold, and CHAS or an equivalent SSIP, along with ISO 9001, 14001 and 45001, and increasingly Cyber Essentials, plus trade and product certifications relevant to the works.

How does the Building Safety Act affect construction bids?

For relevant work, buyers score CDM competence, the Building Safety Act regime and the golden thread of building information directly. Bids must evidence how you keep people safe and manage information, with specific and current detail.

Why is social value so important in construction bids?

Construction touches local communities directly, so social value is often heavily weighted. Local labour and apprenticeships, local and SME spend, community engagement and carbon reduction are commonly scored, and commitments should be specific and measurable.

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