Business Details
Sustainable Building Engineering Experts in Oxford
We are an ambitious building services consultancy with offices in Oxford, London, Birmingham, Manchester, and Cambridge. As an independent, director-owned practice, our leadership team brings over 25 years of collective experience. We specialise in mechanical and electrical engineering solutions, with a focus on lighting design, sustainable building design, building physics, and Passivhaus consultancy. Utilising the latest software and modelling tools, we optimise building performance and efficiency from initial concepts to project completion.Our collaborative approach ensures close partnership with clients, stakeholders, and contractors to achieve outstanding results. With over 60 staff, we are one of the UK's largest independent sustainability-led MEP practices, delivering tailored services across sectors including commercial, healthcare, heritage, and education. Our 2023 acquisition of Light Perceptions Ltd expanded our capabilities into dedicated lighting design.
Services
MEP Engineering
Specialist Lighting Design
BIM Modelling
Sustainability Consultancy
Building Physics
Passivhaus Certification
Energy Audits
Thermal Modelling
Daylight Analysis
Renewable Energy Systems
Highlights and features
- We offer 25+ years of collective leadership experience in sustainable building design
- Our BIM Level 2 certified processes ensure coordinated, error-free project delivery
- We provide integrated Passivhaus consultancy with proven energy efficiency expertise
- Our ISO 9001 and ISO 14001 accreditations demonstrate quality and environmental commitment
- We combine technical engineering with creative lighting design solutions
Associations and certifications
- ISO 9001
- ISO 14001
- RISQS
- ACE: Association of Consulting Engineers
- BSRIA
- CIBSE
- Passivhaus Trust
What people say
Excellent support
High standards
Energy savings
Timely delivery
Technical expertise
Services
MEP Engineering
Our mechanical, electrical, and public health engineering services integrate sustainable design principles with technical precision. We deliver HVAC, power distribution, and sanitation systems that prioritise energy efficiency while maintaining occupant comfort. Our engineers use advanced modelling tools to optimise system performance and reduce operational costs across commercial, healthcare, and educational sectors.
Passivhaus Consultancy
We provide certified Passivhaus design solutions that achieve 90% energy savings compared to conventional buildings. Our consultants use thermal bridging analysis and airtightness strategies to create structures with consistent indoor temperatures and superior air quality. Our expertise covers residential, commercial, and institutional projects seeking the highest international sustainability standards.
Building Physics
Our building physics team specialises in heat transfer analysis, daylight optimisation, and acoustic control. We employ dynamic thermal modelling to prevent overheating and reduce energy demands through fabric-first design. Our services include SAP calculations, CIBSE TM52 compliance assessments, and climate-based daylight simulations for both new builds and heritage structures.
Specialist Lighting Design
We create lighting schemes that balance functionality, aesthetics, and energy efficiency. Our services cover architectural lighting, daylight integration, and control systems for diverse settings including historic buildings and modern commercial spaces. We conduct photometric analysis and TM65 embodied carbon assessments to ensure optimal visual comfort and sustainability.
BIM Modelling
Our BIM Level 2 certified processes use Revit and Navisworks for coordinated project delivery. We create 3D models that streamline construction through clash detection and COBie data management. Our digital engineering services support full lifecycle building management, from initial design coordination to facility maintenance planning across educational, healthcare, and transport sectors.
Questions
What sustainability certifications does CBG hold?
We maintain ISO 9001 (Quality) and ISO 14001 (Environmental) certifications. Our team includes Passivhaus-certified consultants and we deliver BREEAM-assessed projects through partner organisations.
Can CBG handle heritage building projects?
Yes, we specialise in historic buildings with over 50 listed projects completed. Our expertise includes St Michael & All Angels Church and Blenheim Palace Orangery, combining modern systems with conservation requirements.
Do you offer lighting design for residential properties?
Our lighting design services cover private residences including The Croft development. We balance aesthetic appeal with energy efficiency through daylight optimisation and smart control systems.
How does CBG ensure energy efficiency in MEP systems?
We use dynamic thermal modelling and fabric-first principles to reduce energy demand. Our engineers integrate renewable technologies like solar PV and heat pumps with efficient mechanical systems for optimal performance.
What BIM software does CBG use?
We primarily use Autodesk Revit and Navisworks for BIM Level 2 projects. Our models support COBie data exchange and comply with BS EN ISO 19650 standards for coordinated digital engineering.
