Identify carbon & deliver impact with RED Engineering Design
Looking to reduce energy use, meet GRESB targets or decarbonise your assets? RED Engineering Design provides expert-led sustainability audits that form the foundation of long-term environmental strategy and compliance.
Delivered by our Sustainability Solutions & Climate Change team, our audits are tailored to align with major frameworks, including GRESB, CRREM, UKGBC, and ISO 50001. Historically, most of RED's audits have focused on Energy Audits conducted in accordance with ASHRAE guidelines. Recognizing the potential growth market for DC energy audits, we also consider aligning with the requirements of EN 50600. Our audits provide clear, data-backed outputs that feed directly into planning, reporting, and certification requirements.
Our experience spans complex sectors, from data centres and infrastructure to commercial portfolios and built environment design, where sustainability goals must be balanced with operational performance. That’s why our audits do the one thing that matter most: highlight issues to enable action.
What is a Sustainability Audit?
A sustainability audit is often the first step in any client’s journey to reduce energy consumption and carbon emissions. It provides a comprehensive review of current performance, identifying where and how you can improve.
At RED, our audits vary in scope, from individual asset reviews to full portfolio assessments, and are always tailored to your reporting needs, project lifecycle stage, and sustainability ambitions.
We align our outputs with globally recognised frameworks and legislative requirements, including GRESB-aligned ESG reporting, CRREM decarbonisation pathways, UKGBC guidance, and ISO 50001 energy management standards.
Whether you're reporting to stakeholders, responding to planning, or building a net zero strategy, RED's audits provide a reliable, report-ready foundation to build from.
We’re proud to be trusted advisors to clients seeking practical, performance led sustainability solutions that go beyond compliance.Oliver Hanson Associate Engineer
How we supported sustainability reporting on Project Frankfurt 5
In this large-scale data centre development, RED delivered a tailored sustainability audit aligned with the client’s ESG goals and planning requirements. The audit included CRREM-aligned performance modelling, energy reduction strategies, and an embodied carbon assessment that shaped low-impact material selection - all contributing to a robust, future-ready strategy.
Our Audit & Decarbonisation Services
No two projects are the same. That’s why we shape our audit services around your specific sector, asset type, and goals - whether you’re preparing for certification, submitting planning documents, or seeking operational improvements.
We also integrate sustainability assessments with the RIBA Plan of Work Green Overlay and BSRIA BG6, through our impACT consultancy, helping clients understand and reduce environmental impact at every project stage.
GRESB-ready sustainability audits
Tailored to align with ESG disclosure and performance frameworks
Embodied carbon & lifecycle assessments
Quantifying impact and identifying improvement strategies
CRREM & net zero pathway planning
Aligning future performance with global targets
Energy & compliance modelling
Including IES modelling, EPC assessments, Part L & ISO 50001 support
Planning energy statements
Structured for local authority requirements and ESG disclosure
Formatted reporting outputs
Structured to align with TCFD, SFDR, and corporate sustainability frameworks
Why work with RED Engineering Design?
Global expertise. Low-carbon leadership. Audits that lead to action.
RED has been at the forefront of sustainable engineering for over 20 years, aligning our work with the IPCC’s 1.5°C target and delivering real-world results across 75+ countries.
Our Sustainability Solutions & Climate Change team leads the way in audits, reporting, GRESB submissions, certification, and decarbonisation strategy helping clients future-proof their assets, comply with evolving legislation, and deliver measurable impact.
We combine:
- Global capability – Projects delivered in 75+ countries, supported by 14 international offices
- Sector depth – Experts in data centres, commercial real estate, built environment and ICT
- Technical firepower – 850+ employees, in-house digital tools, and Tractebel global backing
- Sustainability focus – Low-carbon innovation is embedded in everything we do
- Proven trust – 84% repeat business rate and long-term client relationships
Need support with sustainability audits or decarbonisation planning?
We’ll help you turn carbon data and compliance requirements into a clear, actionable strategy for long-term environmental impact.
