How to write a winning construction tender

The public sector is one of the biggest construction clients in the country. Councils, schools, NHS trusts, universities, housing associations and government estates all buy building work, from responsive repairs and planned maintenance to refurbishments, extensions and new builds. A lot of it is local, a lot of it repeats, and plenty of it is sized for regional contractors and specialist trades rather than national firms.

What keeps many good builders out is the bid. Construction tenders are long, technical and unforgiving of missing paperwork. This guide walks through how to write a public sector construction bid that scores well: the selection stage, the method statement, pricing, the evidence buyers expect, and the mistakes that most often cost contractors the job.

How public sector construction work is bought

Construction work reaches the market in a few ways:

• Open or competitive tenders advertised on Find a Tender, Public Contracts Scotland or a buyer's own portal.
• Frameworks, where contractors are vetted once and then compete for individual projects through mini-competitions or direct award. Regional and national construction frameworks carry a large share of public building work.
• Dynamic markets (the Procurement Act's replacement for dynamic purchasing systems), which suppliers can join at any time and which buyers then use to run competitions.
• Lower-value quotations, where a buyer invites a handful of contractors to quote for smaller works.

If you're new to public sector work, smaller standalone tenders and quotations are a sensible place to build a track record. Frameworks are worth targeting once you have two or three public sector case studies to point to.

What's in a construction tender pack?

A construction pack is usually bigger than most. Expect:

• An invitation to tender: instructions, timetable, clarification deadline, evaluation criteria and any site visit dates.
• A specification, drawings and employer's requirements: what's being built or repaired, to what standard, and who is responsible for design.
• Pre-construction information: the client's information under CDM 2015 (the Construction (Design and Management) Regulations), covering existing hazards such as asbestos, services and access constraints.
• A selection questionnaire: covering finances, health and safety, quality, environmental management and experience. Some buyers and main contractors use an industry question set instead, such as Build UK's Common Assessment Standard.
• Quality questions: your method statement, programme, risk management, social value and so on.
• A pricing document: a bill of quantities, a schedule of rates, an activity schedule or a lump-sum form.
• The form of contract: commonly a JCT or NEC4 contract, with the buyer's amendments.

Build a compliance checklist first: every document, every question, its word limit, its weighting and its format.

Getting through the selection stage

Many contractors fall at selection before anyone reads their method statement. The questions are usually pass or fail, so treat them as a checklist, not an essay.

Financial standing. Buyers look at turnover, profitability and balance sheet strength, and some set a minimum turnover relative to the contract value. If your accounts look thin for the contract size, a parent company guarantee or a clear explanation of your order book can help, where the buyer allows it.

Health and safety. Expect questions on your policy, competent advice, accident record, RIDDOR reports and enforcement action. A certificate from an SSIP scheme such as CHAS or SafeContractor is widely accepted as evidence.

Experience. Choose examples that match the contract in type, size and setting. A school extension delivered in an occupied school is worth far more here than a bigger private development.

Building safety. The Building Safety Act 2022 brought in dutyholder and competence duties for all building work in England. Expect questions on how you meet them, especially on higher-risk buildings, where dutyholders must show the Building Safety Regulator how they will comply.

Writing the construction method statement

The method statement is where you show the buyer how the job will actually run. Write it for the specific site and scope, not for construction in general.

Understanding of the project

Open by showing you've understood what the buyer is trying to achieve and what makes this project tricky: a live hospital ward, a school that must stay open, a listed building, a tight town-centre site. Evaluators reward contractors who spot the real risks.

Programme and sequencing

Include a programme, usually as a Gantt chart attachment if the buyer allows it, and explain the sequence in words: enabling works, key phases, critical path, long-lead items and handover. Show how you'll work around term times, clinical hours or residents' routines.

Site set-up, logistics and safety

Cover site compound, access and deliveries, traffic management, segregation of the public, noise and dust control, and working hours. Explain how you'll fulfil your CDM 2015 duties, including the construction phase plan if you're principal contractor (or the only contractor), and how you'll manage specific hazards such as asbestos, working at height and live services.

Supply chain management

Most contractors rely on subcontractors, and buyers know it. Explain how you select, vet and manage them, how you check competence and insurance, and how you pay them. Under the Procurement Act, payment within 30 days must flow down the public sector supply chain, so be ready to evidence your own payment performance.

Quality control and handover

Describe inspection and test plans, hold points, snagging, sign-off, and the handover pack: operation and maintenance manuals, as-built drawings, certificates and the information the building owner needs to run the building safely.

Risk management

Show a short risk register for this project: the top five risks, their likelihood and impact, and what you'll do about each. It proves you've thought about the site rather than reached for a template.

Communication with the client and neighbours

Explain who the client's day-to-day contact will be, how often you'll report progress, and how you'll keep neighbours, staff, pupils or patients informed. Registration with the Considerate Constructors Scheme is a useful supporting point.

Pricing a public sector construction tender

Price what's asked, in the format asked. If the buyer provides a bill of quantities, price every line. Leaving lines blank or adding qualifications can make the bid non-compliant. If you spot an error in the quantities, raise it as a clarification question before the deadline.

Don't forget preliminaries. Site management, welfare, scaffolding, temporary works, insurance, security and site set-up are real costs. Price them openly rather than burying them in rates.

Understand the risk in the contract. Under a JCT Design and Build contract or NEC4 Option A, you carry more of the risk of quantities and programme. Read the contract amendments and the treatment of inflation, provisional sums and compensation events before you settle on a price.

Check the arithmetic. Errors in totals and carried-forward figures are surprisingly common, and the buyer's rules on how they're corrected may not favour you.

Avoid an abnormally low price. Buyers can ask you to justify a price that looks too low and can reject the bid. A price you can't build for is a bad win, especially with retention and defects liability on top.

The evidence buyers expect

Have these ready before a tender lands:

• Accreditations: SSIP membership, and ISO 9001, ISO 14001 and ISO 45001 for larger contracts or frameworks.
• Insurance: employer's liability, public liability, contractor's all risks and professional indemnity where you carry design responsibility. Under the Procurement Act this may only be required at award.
• Workforce competence: CSCS cards and trade qualifications for the people who will be on site.
• Policies: health and safety, environmental, quality, equality, modern slavery and safeguarding.
• Accounts: usually two or three years.
• Case studies and references: similar projects, with value, client, dates and a named referee.
• Carbon Reduction Plan: required for in-scope central government contracts worth more than £5 million a year, and increasingly requested by other buyers too.

Social value in construction tenders

Construction is where social value commitments are most scrutinised, because buyers know the sector can make a real difference locally. Typical commitments include local labour, apprenticeships and work placements, training hours, spending with local subcontractors and suppliers, school and college engagement, and community improvement projects. Keep each one specific, measurable and proportionate to the contract, and explain how you'll track and report it. Our guide to writing a social value response covers this in depth.

Common mistakes in construction bids

Generic method statements. A method statement that could apply to any job scores like one. Name the site, the constraints and the people.

Failing selection on a technicality. Out-of-date insurance certificates, missing accounts or an unsigned declaration can end a bid before quality is scored.

Ignoring the contract amendments. Buyers often amend standard JCT or NEC4 terms. Read the amendments before you price.

Inconsistent answers. If your programme says twelve weeks and your method statement says ten, the evaluator will notice. So will the commercial team.

Overpromising on social value. Commitments usually become contract KPIs. Promise what you can deliver and report.

Late or failed upload. Large drawings and programmes take time to upload. Submit well before the deadline.

Where Jonty fits

Finding construction tenders is the easy part. Writing the bid, chasing the certificates and keeping fifty documents consistent is what stops most contractors from competing. Jonty is an AI bid manager built to take that paperwork off your desk.

Jonty Scout finds the construction contracts that fit your trades and region across sources such as Find a Tender, Contracts Finder and Public Contracts Scotland, and emails you the ones worth bidding for, with a note on why. It comes with a 21-day free trial.

With Jonty Bid Manager, Jonty reads the tender pack, builds the compliance checklist, drafts the method statement and social value answers from your own projects and evidence, helps you work through the pricing document and handles the portal submission. Nothing goes to a buyer until you've approved it. Jonty does the paperwork. You do the work.

Construction tender FAQs

What is the Common Assessment Standard?

It's an industry-agreed set of prequalification questions and assessment standards for construction suppliers, developed by Build UK. Where a buyer or main contractor accepts it, one certificate can save you answering the same questions on every bid.

Should I join a construction framework?

If your buyers use one, yes, but frameworks usually ask for a track record. Build public sector case studies through standalone tenders first, then apply when a relevant framework opens or reopens.

Which CPV codes cover construction work?

Construction work sits under CPV division 45000000, with codes such as 45210000 for building construction work and 45453000 for overhaul and refurbishment work.

More bid guides

• How to write a winning cleaning tender
• How to write a winning IT services tender
• How to write a winning social value response