--- title: "Winning Construction Tenders on Carbon: How to Answer the Sustainability Questions" description: "How carbon and sustainability questions are scored in tenders and PQQs, what a high-scoring answer looks like, and the mistakes that lose easy marks." metaTitle: "Winning Construction Tenders on Carbon" ogTitle: "Winning Construction Tenders on Carbon" ogDescription: "How carbon questions are scored in tenders and PQQs, what a winning answer looks like, and the mistakes that lose marks." category: "Winning work" date: "2026-07-23" dateModified: "2026-08-24" readingTime: "7 min read" cardDescription: "How carbon and sustainability questions are scored in tenders and PQQs, what a high-scoring answer looks like, the evidence buyers want, and the mistakes that lose easy marks." lead: "Carbon isn't a box-ticking exercise in tenders any more — it's scored, and it can be the margin between winning and losing. Here's how to answer the sustainability questions so they earn marks instead of leaking them." ctaHeading: "Turn your site data into tender-ready evidence" ctaBody: "VerdCore gives you the emissions figures, scope breakdowns and reduction record that make a carbon answer concrete — and the PAS 2080 and PPN 06/21 documents to attach as proof." footerNote: "This guide is general information, not procurement or legal advice. Requirements vary by buyer — always follow the specific tender documents and current GOV.UK procurement guidance." faq: - q: Why is carbon now scored in construction tenders? a: Public buyers apply the Social Value Model, which includes a weighted fighting climate change theme, and PPN 06/21 makes a Carbon Reduction Plan a pass/fail gate for larger contracts, so a weak carbon answer costs real points. - q: What makes a high-scoring carbon tender answer? a: Answers that are specific, evidenced, quantified and project-relevant, naming a measure, attaching a number and pointing to evidence, rather than a generic statement about taking sustainability seriously. - q: What evidence scores best in a carbon tender question? a: A published Carbon Reduction Plan, Scope 1/2/3 figures on DEFRA factors, PAS 2080 alignment, a named baseline with a reduction trend, and ISO 14001 certification. - q: What is the PPN 06/21 pass/fail gate in a tender? a: Where a contract falls under PPN 06/21, a missing, invalid or out-of-date Carbon Reduction Plan is checked first and can fail the bid automatically, regardless of how well-written the rest of the response is. --- ## Why carbon is now scored, not just asked For years, environmental questions in a tender were a formality — write a nice policy, tick the box, move on. That's over. Public buyers now apply the [**Social Value Model**](https://assets.publishing.service.gov.uk/government/uploads/system/uploads/attachment_data/file/921437/PPN-06_20-Taking-Account-of-Social-Value-in-the-Award-of-Central-Government-Contracts.pdf) under PPN 06/20, which includes an explicit *"fighting climate change"* theme with **scored, weighted questions**. On top of that, PPN 06/21 makes a **Carbon Reduction Plan a pass/fail gate** for larger contracts. And main contractors, under pressure from their own clients, are pushing the same expectations down to subcontractors. The upshot: a weak carbon answer doesn't just look bad — it costs you points in a competition often decided by a few percent. ## The questions buyers actually ask Sustainability sections vary, but they cluster into a handful of themes. Expect to be asked to: - **State your commitment** — policy, Net Zero target, governance - **Show you measure** — do you actually calculate your emissions, and how? - **Describe your reductions** — what specific actions do you take, with what impact? - **Provide evidence** — data, certificates, accreditations, a published plan - **Commit to this project** — a project-specific carbon plan, not just corporate policy - **Manage your supply chain** — how you influence subcontractors and materials ## What a winning answer looks like High-scoring answers share four traits. They are **specific, evidenced, quantified, and project-relevant.** - **Specific:** "We reduced site fuel emissions by switching three generators to HVO" beats "we are committed to reducing emissions." - **Evidenced:** reference real figures, a published Carbon Reduction Plan, PAS 2080 alignment, or ISO 14001. - **Quantified:** put numbers on it — tonnes of CO₂e saved, percentage reductions, a baseline year. - **Project-relevant:** say what you'll do *on this contract*, with named measures and who's accountable. > **The one principle that wins carbon questions: specific beats generic, every time.** Assessors read dozens of near-identical "we take sustainability seriously" answers. The bid that names a measure, attaches a number, and points to evidence stands out immediately — and picks up the marks the others leave on the table. ## What loses you marks - **Vague commitments** with no measurement behind them - **No data** — you can't reduce what you don't track, and assessors know it - **Generic corporate policy** pasted in with no link to this project - **No evidence** — claims with nothing to back them - **Ignoring the supply chain** when the question asks about it - A **missing or out-of-date Carbon Reduction Plan** where PPN 06/21 applies — often an automatic fail ## Evidence that scores When a question asks for proof, the strongest things to attach or reference are: | Evidence | What it signals | |----------|-----------------| | **A published [Carbon Reduction Plan](/resources/how-to-write-a-carbon-reduction-plan.html)** | PPN 06/21 compliance and a real Net Zero commitment | | **[Scope 1/2/3](/resources/scope-1-2-3-emissions-construction.html) figures on DEFRA factors** | You measure properly, not by guesswork | | **[PAS 2080](/resources/pas-2080-for-contractors.html) alignment** | A structured, recognised approach to carbon management | | **A named baseline + reduction trend** | Genuine improvement over time, not a snapshot | | **[ISO 14001](/resources/iso-14001-for-construction.html)** | An audited environmental management system | ## The PPN 06/21 pass/fail gate If the contract falls under [PPN 06/21](/resources/ppn-06-21-explained.html), treat the Carbon Reduction Plan as **non-negotiable**. It must be compliant, published on your website, and current. No amount of well-written prose elsewhere in the bid rescues a missing or invalid CRP — it's checked first, and it's a gate. ## A simple structure for every answer When you're staring at a carbon question, answer it in four moves: 1. **Commit** — state the relevant policy/target in one line. 2. **Measure** — how you calculate emissions (Scope 1/2/3, DEFRA factors). 3. **Act** — the specific measures you take, with quantified savings. 4. **Prove** — the evidence you can attach (CRP, PAS 2080, ISO 14001, data).
Four moves for every carbon question
Commit
State the policy or target
→
Measure
Scope 1/2/3, DEFRA factors
→
Act
Specific measures, quantified
→
Prove
CRP, PAS 2080, ISO 14001, data
The firms that win on carbon aren't necessarily the greenest — they're the ones who can **evidence** it. Consistent, project-by-project emissions data is what turns "we care about carbon" into a scored, defensible answer. That evidence is a by-product of tracking as you go rather than a document written at bid time — see [construction carbon reporting software](/construction-carbon-reporting-software.html).