GREENGAUGE BUILDING ENERGY CONSULTANTS LTD

What GREENGAUGE BUILDING ENERGY CONSULTANTS LTD does

Greengauge Building Energy Consultants Ltd is a UK-based, private building physics and building services engineering consultancy founded in 2010 by Hannah Jones and Toby Cambray and headquartered in Bradford-on-Avon, Wiltshire, with a second office in Slaithwaite, Yorkshire. The firm operates as an Employee Ownership Trust following an Autumn 2024 ownership transfer. With a team of 16 highly experienced engineers and building physicists, Greengauge specialises in sustainable, low-energy building design across both new-build and retrofit projects, serving architects, individual homeowners, commercial landlords, housing associations, local authorities, higher education institutions, and heritage building owners throughout the United Kingdom.

The company's core offering is an integrated consultancy that combines building physics, building services (mechanical and electrical) engineering, and building design from project inception. Service lines include Passivhaus design and certification (Greengauge is one of a small number of PHI-certified Passivhaus Certifiers in the UK), AECB CarbonLite certification, moisture risk assessment using WUFI and DELPHIN, thermal bridging analysis using FLIXO and COMSOL Multiphysics, dynamic thermal modelling via IES VE, building regulations Part L compliance, renewables design, lighting design, and BIM coordination using Archicad and REVIT MEP across RIBA design stages. The firm holds multiple sector credentials including CIBSE Low Carbon Consultant, ILP Lighting accreditation, PHI Passivhaus Designer/Consultant/Certifier, AECB Approved Certifier, and STBA membership, and has been involved in flagship projects such as Mikhail Riches' Goldsmith Street (RIBA Stirling Prize 2019), Gurnell (295 Passivhaus homes in London), and Voreda House (the UK's first council-office EnerPHit retrofit).

Greengauge generates revenue through professional-services fees on project engagements, supplemented by chargeable 60-minute topic-specific consultation sessions and CPD training delivered to architectural practices; pricing is not publicly disclosed. Distribution is direct-to-client via project teams operating from two UK offices, with a CPD programme and a content-marketing website (Insights blog, portfolio case studies) functioning as the principal top- and mid-funnel channels. The firm carries no disclosed external funding, no subsidiaries, and no parent company, operating as an independent employee-owned specialist consultancy.

Name

GREENGAUGE BUILDING ENERGY CONSULTANTS LTD

Legal name

Greengauge Building Energy Consultants Ltd

Website

https://ggbec.co.uk

Company type

Private

Founded year

2010

Operating status

Operating

Short description

Greengauge Building Energy Consultants is a UK-based, employee-owned building physics and building services consultancy providing Passivhaus design, certification, moisture risk assessment, thermal bridging analysis, and MEP engineering to architects, homeowners, councils, and heritage clients across new-build and retrofit projects.

Ownership category

akta.pro rank

Product category

Building Energy Consultancy

NAICS

Architectural, Engineering, and Related Services (5413), Engineering Services (541330)

akta.pro primary industry

Sustainable/Green Building & LEED Consulting (BPAHAKAG)

akta.pro secondary industries

Residential Green / High-Performance Home Construction (Net-Zero, Passive House) (IMAFABAH), HVAC & Refrigeration Contracting (IMAFALAB)

Keywords

• Building physics consultancy
• Passivhaus design services
• Building services engineering
• Moisture risk assessment
• Thermal bridging analysis

Headquarters

HQ city

Bradford-on-avon

HQ country

United Kingdom

HQ region

Europe

Offices2 records

Markets served

GTM type

B2B

Offering type

Services

Cost components

Personnel, Operations, Marketing or Sales, Technology or R&D

Revenue model

1. Building Physics Consultancy: Core consultancy services providing building physics expertise including Passivhaus design, thermal modelling, moisture risk assessment, dynamic thermal analysis, and certification/compliance services.
2. Building Services Engineering: Design and specification of mechanical and electrical systems in buildings including heating, ventilation, air conditioning, domestic water, drainage, electrical power, lighting, data, communications, fire alarms, security systems and lightning protection, structured across RIBA design stages.
3. CPD Training: Continuing Professional Development sessions offered to architectural practices on Passivhaus certification, key design principles, EnerPHit on heritage projects, EnerPHit component route, and moisture risk assessment.

Pricing tiers

Go-to-market motion2 records

Distribution channels3 records

Marketing channels5 records

Core offering

Greengauge is a building and engineering consultancy specialising in sustainable, low energy building design. The company provides an integrated approach combining building physics, building services engineering, and building design, with expertise in Passivhaus design and certification, AECB certification, moisture risk assessment, thermal bridging analysis, dynamic thermal modelling, and M&E (mechanical and electrical) design for new build and retrofit projects across the UK.

Product overview

Greengauge Building Energy Consultants is a building and engineering consultancy specialising in sustainable, low energy design. The company offers an integrated approach where building physics, building services and building design come together for better outcomes. Services include Passivhaus Design and Certification, AECB Certification, Building Fabric & Comfort Assessment, Moisture Risk Assessment (using WUFI and DELPHIN), Thermal Bridging Analysis (using FLIXO and COMSOL), Dynamic Thermal Analysis (using IES VE), Certification & Compliance, Building Services Design, Renewables Design, Lighting Design, and BIM Services. The company also offers CPD training programs on Passivhaus and retrofit topics.

Differentiator

Problem solved

Functional benefit

Products and services

• Passivhaus Design Services
• Passivhaus Certification Services
• AECB Certification Services
• Building Fabric and Comfort Services
• Moisture Risk Assessment
• Thermal Bridging Analysis
• Dynamic Thermal Analysis
• Certification and Compliance Services
• Building Services Design
• Renewables Design
• Lighting Design
• BIM Services
• CPD Training
• Consultation Sessions

Quantifiable outcome

• Goldsmith Street achieved RIBA Stirling Prize 2019
• +4 more outcomes

Named customers9 records

Segments4 records

Ideal customer profiles4 records

Technology focussed No

API detail

Has API

No

API docs

API detail

Core technology

AI maturity

App detail

Feature4 records

Partnerships

Eleven partnerships are on record, tiered core and minor.

• JDDK ArchitectscoreStrategic or Co-development PartnerProject partnership on Keelmen's Hospital Grade II* listed building retrofit in Newcastle. JDDK Architects led the project team with Greengauge providing moisture risk assessment using Delphin 2D hygrothermal modelling.
• Historic EnglandminorStrategic or Co-development PartnerHistoric England published an Energy Efficiency and Decarbonisation case study on the Keelmen's Hospital project, demonstrating how energy efficiency and decarbonisation goals can be balanced with heritage protection.
• Tyne & Wear Building Preservation TrustcoreStrategic or Co-development PartnerClient and project partner for Keelmen's Hospital restoration - Grade II* listed 1701 building being converted to affordable housing in partnership with Newcastle City Council.
• Mikhail RichescoreStrategic or Co-development PartnerOngoing partnership with Mikhail Riches on major Passivhaus projects including Gurnell (295 homes in London) and Elm Grove Nailsea (52 homes). Mikhail Riches won Stirling Prize 2019 for Goldsmith Street where Greengauge provided M&E design.
• Harrison Brookes ArchitectscoreStrategic or Co-development PartnerLed the Hop Pole Inn retrofit project - Grade II listed 16th century Wiltshire village pub. Greengauge provided PHPP modelling, dynamic thermal modelling, thermal bridging, M&E design and moisture risk analysis.
• MCW ArchitectscoreStrategic or Co-development PartnerProject partnership on 1-11 Portugal Street AECB Retrofit - deep retrofit of six houses for St John's College Cambridge postgraduate accommodation, achieving AECB Retrofit certification.
• St John's College, CambridgecoreStrategic or Co-development PartnerClient for Portugal Street retrofit project - complex retrofit and extension of terrace of 6 houses for 43-bed student accommodation, achieving AECB Retrofit standard certification.
• Rock ArchitectscoreStrategic or Co-development PartnerLed Corbel House EnerPHit project in Cambridge - whole house Passivhaus retrofit of a 1950s semi-detached house, achieving EnerPHit certification. Greengauge provided Passivhaus consultancy and M&E design.
• PKA ArchitectscoreStrategic or Co-development PartnerArchitect and Passivhaus Designer for Brewery Corner, Devizes - infill development of nine Passivhaus houses achieving formal certification for the larger terrace.
• 2030 ArchitectscoreStrategic or Co-development PartnerArchitect for Voreda House - UK's first council office EnerPHit retrofit for Westmorland and Furness Council. Greengauge provided Passivhaus consultancy services.
• Collinson ConstructionminorImplementation/ SI/ Consulting PartnerContractor for Voreda House EnerPHit retrofit project - transforming 1950s-60s municipal offices into state-of-the-art EnerPHit certified council building.

Scale indicators4 records

Recent moves7 records

Expansion highlights5 records

Direct peers

• Max Fordham: UK-based building services engineering consultancy with a strong sustainability and Passivhaus orientation. Both firms offer integrated building physics and MEP services to architects and homeowners on low-energy projects, making them the closest direct competitor.
• WARM (previously Warm:Low Energy Buildings): UK Passivhaus consultancy and PHI Certifier. Comparable niche specialist providing Passivhaus design, certification, and building-physics services to architects and homeowners across new-build and retrofit projects.
• Elementa Consulting: Independent UK building services and sustainability consultancy focused on low-energy and Passivhaus projects. Comparable headcount-scale direct competitor delivering building physics and MEP design to similar architectural and developer clients.
• Peter Warm Associates: UK Passivhaus and low-energy building services consultancy. Comparable niche specialist delivering integrated building physics, certification, and M&E design to similar client segments.
• MCS Sustainable Design: UK engineering consultancy specialising in low-energy and Passivhaus building design. Comparable on integrated building physics, MEP, and Passivhaus certification services to architects and developers.
• Etude Passivhaus Certifiers: UK Passivhaus consultancy and certified Certifier providing PHPP modelling and certification. Direct comparable as a small specialist operating in the same Passivhaus certification market as Greengauge.

Broad incumbents

• Buro Happold: Global engineering consultancy with a dedicated sustainability and building performance group. Comparable on integrated building services and low-energy building design across commercial and residential sectors, though much broader in scope.
• Cundall: Multi-disciplinary engineering consultancy with a strong sustainability and building performance practice. Comparable because it delivers MEP, building physics, and Passivhaus-style low-energy design, but as a global generalist rather than a focused specialist.
• Hoare Lea: One of the UK's largest MEP engineering consultancies, now offering sustainable and Passivhaus design as part of a broader engineering portfolio. Comparable on building services, sustainability, and lighting services but at far greater scale and breadth.

Others

• Mitsubishi Estate / BRE Group (Sustainable Buildings): BRE provides consultancy, certification, and research for sustainable buildings (BREEAM, etc.). Comparable as an adjacent ecosystem player influencing standards and certification, but not a direct project-delivery competitor.

Market position

Strengths5 records

Weaknesses5 records

Competitive moat4 records

Key risks6 records

Key highlights7 records

Customer concentration

• Xtwitter.com/greengaugeBEC
• Facebookfacebook.com/Greengaugebuildingenergy
• LinkedInlinkedin.com/company/greengauge-building-energy-consultants

Compliance6 records

Revenue estimate

Valuation estimate

Number of profiles

Profiles11 records

Funding overview

Funding rounds

Investors

Funding detail is available on the Subscription and Enterprise plan.Contact sales →

M&A

Investments

M&A and investment is available on the Subscription and Enterprise plan.Contact sales →

Frequently asked questions about GREENGAUGE BUILDING ENERGY CONSULTANTS LTD