What E3 Consulting Engineers does

E3 Consulting Engineers LLP is a UK-based building services engineering design consultancy, registered in England and Wales (OC 350589) and operating from offices in Bristol (headquarters at 16 Queen Square), Bath, and London. Founded in 2010 after evolving from the Bath office of Ernest Griffiths Consulting Engineers, the firm specialises in low-energy and sustainable building services engineering design, with particular depth in Passivhaus methodology since delivering the UK's first certified Passivhaus schools in 2011. Its project portfolio spans education, arts and heritage, leisure, commercial, and residential sectors, with award-winning credentials including RIBA National Awards, CIBSE Building Performance Awards, Passivhaus Trust Awards, and Europa Nostra prizes.\n\nThe practice offers an integrated service covering mechanical and electrical design — heating, ventilation, air conditioning, domestic water, drainage, electrical power, lighting, data, communications, fire alarms, security, and lightning protection — supported by advanced simulation and BIM capabilities. Core technologies include Autodesk Revit and AutoCAD for BIM, MagiCAD for building services modelling, IES Virtual Environment for daylighting, thermal comfort, energy, and CFD analysis, PHPP for Passivhaus design, and Dialux / Amtech for lighting and electrical design. Quality is governed by ISO 9001:2015 certification. The firm holds the distinction of designing the UK's first non-domestic Passivhaus Plus building (Bicester Eco Business Centre) and the first Passivhaus archive repository (Hereford Archive and Records Centre).\n\nE3 generates revenue through professional services fees on a project-by-project basis, acquired via direct client engagement and architect-led collaborations. Customers include schools (Alleyn's, Wilkinson, Bushbury Hill, St Luke's), heritage bodies (English Heritage, Imperial War Museums, Middleport Pottery Trust, The Newt in Somerset), commercial clients (Maybourne Group, Cherwell District Council), and charities (Dogs Trust across multiple rehoming centres). The firm operates as a partner-led LLP with three named Partners (Hugh Griffiths, Andy Worsick, Mathew Twitchen) plus a Founding Partner (Andy Jarvis), Practice Manager Jo Burrows, and approximately 17–21 engineering and support staff. The practice publicly aligns with LETI and UK Green Building Council net zero carbon definitions and is a signatory of the Building Services Engineers Declare Climate and Biodiversity Emergency pledge.

Name

E3 Consulting Engineers

Legal name

E3 Consulting Engineers LLP

Website

https://e3ce.com

Company type

Private

Operating status

Operating

Headcount range

11–50 employees

Short description

E3 Consulting Engineers LLP is a UK building services engineering design consultancy specialising in Passivhaus and BREEAM-certified low-energy design across education, heritage, leisure, and commercial sectors, serving schools, museums, councils, and developers from offices in Bristol, Bath, and London.

Ownership category

akta.pro rank

Product category

Building Services Engineering Design

NAICS

Engineering Services (54133)

SIC

Services-Engineering Services (8711)

akta.pro primary industry

Energy Systems & Power Engineering Consulting (BPAHAIAG)

akta.pro secondary industry

Construction Engineering & Constructability Consulting (BPAHAIAN)

Keywords

• Building services engineering
• MEP engineering consultancy
• Passivhaus design services
• Sustainable building design
• Low energy building engineering

Headquarters

HQ city

Bristol

HQ country

United Kingdom

HQ region

Europe

Offices3 records

Markets served

GTM type

B2B

Offering type

Services

Revenue model

1. Engineering Consultancy Services: 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. Services include advisory services, BIM, energy calculations, condition surveys, building regulations compliance, EPCs, energy audits, lighting design, Passivhaus design consultancy, renewable energy feasibility studies, and thermal simulation analysis.

Go-to-market motion1 record

Distribution channels2 records

Marketing channels1 record

Core offering

E3 Consulting Engineers is a building services engineering design consultancy providing mechanical and electrical (M&E) engineering design for buildings. The firm designs and specifies systems including heating, ventilation, air conditioning, domestic water, drainage, electrical power, lighting, data, communications, fire alarms, security systems and lightning protection. Core service lines include Passivhaus design consultancy, BREEAM-rated design, energy audits, condition surveys, renewable energy feasibility studies, thermal/energy/ventilation/daylighting simulation, and BIM modelling using Revit and AutoCAD.

Product overview

E3 Consulting Engineers is a building services engineering design consultancy offering a unified set of engineering design services for buildings. Their core offering centres on the design and specification of mechanical and electrical systems (heating, ventilation, air conditioning, domestic water, drainage, electrical power, lighting, data, communications, fire alarms, security systems, and lightning protection). This is supported by integrated simulation and analysis tools including IES Virtual Environment, PHPP, Dialux, Amtech, and BIM tools (Revit/AutoCAD with MagiCAD). Key service lines include M&E design for Passivhaus and BREEAM certified buildings, energy audits, lighting design, condition surveys, and Passivhaus Design Consultancy. The practice is structured around a core engineering consultancy with specialists in mechanical and electrical disciplines, and holds ISO 9001:2015 quality certification.

Differentiator

Problem solved

Functional benefit

Products and services

• Building Information Modelling (BIM) Services Full in-house BIM capabilities using AutoCAD for 2D work and Revit for 3D modelling, augmented by MagiCAD plug-in for sizing, scheduling, and enhanced modelling of building services systems. Delivered to developers, architects, schools, and councils requiring coordinated building services models.
• M&E Design for Passivhaus and BREEAM Buildings Design and specification of mechanical and electrical building services systems for Passivhaus certified and BREEAM assessed buildings, including certified Passivhaus Designers and PHPP analysis.
• Passivhaus Design Consultancy Specialist Passivhaus design consultancy including PHPP analysis, certified Passivhaus Designers on the team, and building services design for Passivhaus certified buildings.
• Energy Audits and Performance Analysis Energy audits, Building Regulations Part L energy calculations, EPCs, operational energy assessments using CIBSE TM54, energy statements for planning applications, and decarbonisation assessments for existing buildings.
• Lighting Design Services Lighting design, 3D modelling and specification using Dialux and Dialux Evo for rendered visualisations, alongside electrical schematic design via Amtech.
• Thermal, Energy, Ventilation and Daylighting Analysis Simulation and analysis services for thermal performance, energy consumption, ventilation strategy, and daylighting using IES Virtual Environment and Passivhaus Planning Package (PHPP).
• Renewable Energy Feasibility Studies

Quantifiable outcome

• First non-domestic Passivhaus Plus building in UK (Bicester Eco Business Centre)
• +4 more outcomes

Named customers15 records

Segments5 records

API detail

Has API

No

API docs

API detail

Core technology

AI maturity

App detail

Integration6 records

Feature4 records

Scale indicators5 records

Recent moves6 records

Expansion highlights5 records

Broad incumbents

• Hoare Lea: UK's largest independent building services engineering consultancy; competes on the same M&E and sustainability design briefs at larger scale, including Passivhaus and BREEAM-certified projects.
• Cundall: Multi-disciplinary engineering consultancy with strong sustainability and BREEAM credentials; competes on education, heritage, and commercial M&E design at greater scale and broader geographic reach.
• Arup: Global engineering consultancy with significant building services, sustainability, and Passivhaus capability; competes on the same education, heritage, and cultural briefs at global scale and is a known former employer of E3 engineers.
• Buro Happold: International engineering consultancy with deep building services, environmental simulation, and heritage expertise; competes on high-performance, low-carbon design at significantly larger scale.

Direct peers

• OR Consulting: UK building services engineering consultancy delivering M&E and sustainability design across commercial, education, and public-sector projects; similar scale and overlap on BREEAM/Passivhaus briefs.
• Webb Yates Engineers: UK engineering consultancy combining structural and building services work on heritage, education, and cultural projects; comparable boutique profile and design-led approach to award-quality buildings.
• Elementa Consulting: UK building services and Passivhaus design consultancy; close peer given shared specialism in Passivhaus-certified school, public, and heritage projects and similar boutique scale.
• Atelier Ten: Environmental engineering consultancy focused on high-performance, low-energy building design; directly comparable on sustainability-first consulting for museums, cultural, and education projects in the UK.
• Skelly & Couch: London-based environmental engineering consultancy specialising in low-energy design for cultural and heritage buildings; closely comparable on environmental simulation, Passivhaus, and high-performance M&E design.
• Max Fordham: UK building services engineering consultancy with a comparable sustainability and low-energy design ethos, similar boutique scale, and direct overlap on environmental design for cultural, education, and heritage buildings.

Market position

Strengths5 records

Weaknesses5 records

Competitive moat4 records

Key risks7 records

Key highlights7 records

Customer concentration

• LinkedInlinkedin.com/company/e3-consulting-engineers

Compliance1 record

Revenue estimate

Valuation estimate

Number of profiles

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 E3 Consulting Engineers