Sustainability
Information engineering, not greenwashing · Updated 27 June 2026
At Wallnut, sustainability is not a green-materials narrative — it is digital efficiency, transparency and traceability. Architecture, engineering and construction under one roof, on an in-house BIM platform that cuts rework, waste and opacity. We prefer small true numbers to big empty claims.
A 100% electric fleet
We are replacing our entire diesel passenger fleet with electric vehicles: 3 Kia e-Niro, 1 Tesla Model 3 and one more e-Niro this month — only cargo vehicles remain, for specific needs. Charging happens at our HQ, on a 100% green tariff with Guarantees of Origin, or on the client site.
Our total diesel spend (~€2,200/month) equals ~36 tonnes of CO₂e per year — the whole fleet (Scope 1; an estimate derived from spend, with published assumptions: DGEG €1.857/L, DEFRA 2025 factor 2.571 kg CO₂e/L). Electrification eliminates the passenger share (the majority); cargo vehicles stay diesel and the exact split will be measured with telemetry. HQ charging is 100% green (Guarantees of Origin); on client sites it uses the client’s electricity. So we publish the baseline and the action — not an invented reduction figure.
How we measure — and what we don’t yet
We follow the voluntary EU Level(s) and VSME frameworks, right-sized for us — not CSRD, which does not apply to us (claiming it would be greenwashing).
Every number we publish carries a date and a source. Where we don’t yet have data — office electricity, embodied carbon per project — we say “we will measure”, never a figure that isn’t real. We don’t use “net zero”.
Digital, open, paperless
100% of projects in an ISO 19650 common data environment; IFC and openBIM models; automatic quantity take-off from the model; and an engine that checks 7,122 regulatory rules against the design.
The result: less paper, fewer site trips (3D reality capture instead of physical revisits) and less rework — efficiency that is itself a sustainability decision.
People and governance
Fair, transparent labour costing (wage + charges, no inflated bands), fiscal compliance (SAF-T) and an auditable platform where every decision has a dated origin. Information integrity is the foundation of our social and governance sustainability.
Commitments 2026–2028
- Passenger fleet 100% electric and measured (real litres, not estimated).
- Phased embodied-carbon (LCA) on new projects.
- This public report kept up to date.
- B Corp application in 2027.
- Gender parity in leadership by 2028.
Honesty first
This is a living document. If a number isn’t real, it isn’t here. Talk to us about how we build.