Construction CSRD emissions reporting 2026: what your sites actually have to measure

TLDR

• The EU Corporate Sustainability Reporting Directive (Directive (EU) 2022/2464) and its February 2026 Omnibus I amendment now bind companies with more than 1,000 employees and over €450 million in net turnover. After Omnibus, roughly 80 % fewer companies fall directly in scope, but supply-chain pressure pulls everyone else in.
• Construction firms must report greenhouse gas emissions across Scope 1 (on-site diesel generators, plant), Scope 2 (purchased grid electricity) and Scope 3 (materials, logistics, use-phase emissions).
• Buildings account for 39 % of global energy-related CO2 emissions. 11 percentage points of that come from materials and the construction phase itself (World Green Building Council, 2019).
• The hardest data layer to capture is on-site Scope 1 and Scope 2. Most contractors still estimate it from annual fuel invoices. ESRS E1-6 requires site-by-site, location-resolved data.
• For UK contractors, EU CSRD reaches in via parent-company consolidation and the Procurement Policy Note (PPN 006, formerly PPN 06/21) already mandates Scope 1, 2 and 3 plus a net-zero plan for any government contract above £5 million.

What is CSRD and does it apply to my construction business?

CSRD (Corporate Sustainability Reporting Directive, Directive (EU) 2022/2464) is the EU rulebook for sustainability reporting. It replaces the older Non-Financial Reporting Directive and forces in-scope companies to publish climate, social and governance data using the European Sustainability Reporting Standards (ESRS).

The Omnibus I amendment, adopted by the EU Council on 24 February 2026, raised the threshold dramatically. Only companies with more than 1,000 employees AND net turnover above €450 million are directly bound. For third-country undertakings, the parent threshold is €450 million net turnover in the EU and €200 million for a subsidiary or branch.

For UK and other non-EU contractors, the directive bites in two ways. First, if your group has an EU parent or significant EU operations, you are pulled into consolidated reporting. Second, your EU clients will require ESRS-grade data as a contractual condition even if you are not yourself in scope.

When does construction reporting start?

The timeline runs in waves. Wave 1 stayed on the original schedule. Waves 2 and 3 were pushed two years forward by the ”Stop-the-Clock” directive (Directive (EU) 2025/794).

Large UK and European contractors with EU operations (think the Bouygues, Skanska, NCC, Bam, VolkerWessels group) are mostly in Wave 1 already. Mid-size firms that fell out of scope under Omnibus still report into bigger primes through tier-1 contract data requests.

What does ESRS E1 require for emissions?

ESRS E1 is the climate change standard inside the ESRS. Disclosure Requirement E1-6 covers Gross Scopes 1, 2 and 3 GHG emissions plus the total. Companies must apply the GHG Protocol methodology, present figures by location and by market, and disclose intensity per unit of net revenue.

The current draft of the revised ESRS standards (Q1/Q2 2026 public consultation) cuts mandatory datapoints by roughly 70 %, from about 1,073 to about 320 (EFRAG, December 2025 technical advice). The Scope 1, 2 and 3 emission disclosures remain mandatory, but a lot of narrative and forward-looking data drops out.

For construction firms this matters because the surviving requirements are the hard, granular ones: location-resolved energy use and verifiable Scope 1 fuel data per project.

What counts as Scope 1, 2 and 3 on a construction site?

The Scope categorisation comes from the GHG Protocol and is adopted by ESRS E1. Mapped to a real construction project it looks like this.

The headline numbers are stark. Buildings account for 39 % of global energy-related CO2 emissions, of which 11 percentage points come from upfront materials and construction (World Green Building Council, Bringing Embodied Carbon Upfront, 2019). The remaining 28 percentage points come from operational use of the finished building.

Scope 3 is the elephant. The UK government’s October 2023 call for evidence on Scope 3 noted that Scope 3 emissions can account for 80–95 % of an organisation’s total value chain carbon footprint. That ratio holds for construction.

Why is on-site Scope 1 and Scope 2 the hardest part to report?

Scope 3 dominates in tonnage, but its data comes from purchase ledgers and supplier Environmental Product Declarations. Scope 1 and 2 are the immediate, auditable site emissions and the line item the auditor checks first.

Most contractors estimate site diesel from annual procurement totals divided across months and projects. That estimate did not pass a financial audit for cost data and it will not pass a CSRD limited-assurance audit for emissions data either. Assurance starts at limited assurance for the first reporting year and may later tighten to reasonable assurance; the final level depends on national implementation of the Omnibus package.

For UK firms the parallel issue is the Streamlined Energy and Carbon Reporting framework (SECR), which already mandates Scope 1 and 2 plus voluntary Scope 3 for large UK companies. The UK government consulted in 2023 on making Scope 3 mandatory; the response is overdue but the direction of travel is clear.

How does Spine support construction emissions reporting?

Spine is TSR-Elsite’s IoT layer for construction site distribution boards. It measures consumption as standard and captures kWh data in real time, plus generator load curves from which diesel consumption can be derived. The standard measurement is accurate but not MID-approved; if the reading is used for billing, MID-approved measurement is available as a separate add-on accessory. Reports can be exported per site and per device; integration interfaces are agreed case by case.

That gives three things a fuel invoice does not.

1. Project-level resolution. ESRS E1-6 requires disclosure by location. A site-resolved kWh log gives the auditor exactly what they need.
2. Measured generator load curve. An under-loaded or over-loaded generator burns significantly more diesel per useful kWh than one running in its efficient range. Spine does not regulate the generator load or cut fuel consumption itself; it measures consumption and gives visibility into how the equipment is used, from which the operator can draw their own conclusions.
3. An audit trail. Timestamped sensor data replaces a finance-team estimate.

How does UK SECR interact with EU CSRD?

UK SECR (Streamlined Energy and Carbon Reporting, in force since 2019) and EU CSRD are parallel regimes, not interchangeable. SECR requires Scope 1 and 2 emissions plus an intensity ratio for UK quoted companies and large UK unquoted companies. Scope 3 is voluntary under SECR but mandatory under ESRS E1.

UK construction firms typically meet a third standard on top of these two: the UK Cabinet Office Procurement Policy Note (PPN 006, formerly PPN 06/21) requires all suppliers bidding on UK government contracts above £5 million to publish a Carbon Reduction Plan covering Scope 1, 2 and the most material Scope 3 categories, plus a credible path to net zero by 2050.

In practical terms, a mid-size UK contractor selling into government projects already reports the same data CSRD demands. Spine’s data layer feeds all three regimes from the same sensor stream.

Frequently asked questions

Does Omnibus I exempt small construction firms from reporting?
From direct CSRD reporting, yes if you have fewer than 1,000 employees AND less than €450 million net turnover. From supply chain reporting, no. Large primes pass ESRS-aligned data requests down the tier. The EU is finalising a Voluntary Sustainability Reporting Standard for SMEs (VSME) to give smaller firms a lighter template.

Which Scope 3 categories matter most for a construction firm?
Category 1 (purchased goods and services, including concrete, steel, materials), Category 4 (upstream transportation to site), Category 11 (use of sold buildings) and Category 12 (end-of-life treatment). These four categories typically cover 80–95 % of a construction company’s total emissions.

What if the diesel for the on-site generator comes from a hire company?
It is still your Scope 1 emission as the operator of the activity, because operational control over the fuel combustion sits with the site, not the rental supplier. The GHG Protocol’s operational control boundary determines responsibility, not legal ownership of the fuel.

How does ESRS E1 differ from the GHG Protocol?
ESRS E1 adopts the GHG Protocol’s calculation methods wholesale but adds a double materiality assessment, a forward-looking transition plan, and a quantified financial-effects analysis. Counting emissions is no longer enough on its own. You must show how you will reduce them and what the financial exposure is.

Is Spine data audit-ready?
The data is timestamped at source, and the auditor receives site-by-site kWh data at daily granularity, with the generator load curve as backup evidence. Billable MID-approved metering is available as a separate add-on accessory.

What to do next

Start by checking whether your company falls directly under CSRD (the 1,000 employees plus €450 million threshold after Omnibus) or indirectly through your value chain. Then audit what site data you can produce automatically today versus what is currently estimated.

For most construction firms, on-site Scope 1 and 2 is the weakest link. That is also the first thing an auditor asks for. Fix that data layer first; the rest of the ESRS E1 narrative writes itself once the underlying numbers are sound.

More reading:
– Spine: real-time site power monitoring
– Generator load management in practice
– MID certified energy meter on site
– Remote energy meter reading
– Book a Spine demo

Sources

• Directive (EU) 2022/2464 (CSRD) and the Omnibus I amendment (February 2026)
• ESRS Delegated Regulation (EU) 2023/2772, Annex I (ESRS E1)
• GHG Protocol Corporate Standard and Corporate Value Chain (Scope 3) Standard
• World Green Building Council, Bringing Embodied Carbon Upfront, 2019
• Skanska Group, Annual and Sustainability Report 2024
• NCC Group, Annual and Sustainability Report 2024
• EU Council press release, 24 February 2026 (Omnibus I adoption)
• UK Cabinet Office, Procurement Policy Note 006 (formerly PPN 06/21)
• UK Department for Energy Security and Net Zero, Scope 3 Call for Evidence, October 2023
• The Companies (Directors’ Report) and Limited Liability Partnerships (Energy and Carbon Report) Regulations 2018 (UK SECR)
• ISO 14064-1:2018