What C3 Group does

C3 Group (Yorkshire) Ltd is a UK-based sustainability and building services design consultancy founded in 2022 and headquartered in Hull, with a regional office in Leeds. The firm supports public sector bodies, education providers (particularly Multi-Academy Trusts), healthcare estates, charities, and commercial clients across England in reducing building-related carbon emissions and meeting statutory net zero obligations. Its services span strategic advisory through technical execution: Road Map to Net Zero / Carbon Reduction Plans, Heat Decarbonisation Plans, Renewables Feasibility, Building Services M&E Design across all RIBA stages 1–6 (with BIM and digital engineering), Energy Modelling and digital twin simulation, Funding & Business Case Support (notably PSDS and Salix applications), Net Zero Project Management, and tiered Strategic Energy Partner retainers (Bronze/Silver/Gold). Construction and installation delivery is provided through its sister company GW Power.

The company's underlying technology stack centres on Building Information Modelling (BIM), digital engineering, dynamic energy modelling, and digital twin simulation tools applied across RIBA design stages to optimise building performance and demonstrate Part L and decarbonisation compliance. Supporting certifications include triple ISO certification (9001, 14001, 45001), PAS 2038 retrofit accreditation, CIBSE Heat Network Consultant status, and Investors in the Environment Green Status. In 2025 the firm facilitated £14.3M+ of PSDS grant funding for clients and £12.6M for 88 charities, evidencing deep expertise in navigating UK government decarbonisation funding programmes.

C3 Group operates a sales-led, consultative go-to-market model with field-based engagement of enterprise and public sector buyers. Revenue is generated on a project-by-project professional services basis, with fees negotiated per commission and engagement cycles typically spanning 12–24 months across RIBA design stages; the newer Strategic Energy Partner tiered retainer introduces a recurring advisory layer. Primary customer segments are UK public sector and local government and education MATs, with secondary segments in healthcare, commercial real estate, and the charity sector. Marketing is conducted via LinkedIn, SEO, partner-led webinars, industry events, and PR, with distribution entirely through direct sales rather than channel partners.

Name

C3 Group

Legal name

C3 Group (Yorkshire) Ltd

Website

https://c3group.co.uk

Company type

Private

Founded year

2022

Operating status

Operating

Headcount range

1–10 employees

Short description

C3 Group is a Hull-based sustainability and building services design consultancy serving UK public sector bodies, education Multi-Academy Trusts, healthcare estates, and commercial clients, delivering decarbonisation planning, M&E design, energy modelling, and PSDS/Salix grant funding support across all RIBA stages.

Ownership category

akta.pro rank

Product category

Sustainability Consulting and Building Services Design

NAICS

Environmental Consulting Services (541620), Professional, Scientific, and Technical Services (541)

akta.pro primary industry

GHG Accounting & Net-Zero/Decarbonization Planning (Scopes 1–3) (EUAHAJAC)

akta.pro secondary industries

Regulatory & Disclosure Strategy (CSRD/ESRS, ISSB/IFRS S2, SEC, TCFD) (EUABAKAH), Benchmarking, Ratings & Stakeholder Reporting Portals (Scorecards, Dashboards) (EUABAEAJ)

Keywords

• Sustainability consulting services
• Building services design
• Decarbonisation planning
• Net zero strategy
• Energy efficiency consulting

Headquarters

HQ city

Kingston upon Hull

HQ country

United Kingdom

HQ region

Europe

Offices2 records

Markets served

GTM type

B2B

Offering type

Services

Cost components

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

Revenue model

1. Sustainability & Building Services Consulting: Professional consulting engagements for decarbonisation planning, net zero strategy, building services design, and energy modelling. Projects are typically scoped per commission, with fees based on project complexity, estate size, and RIBA stage scope. Engagements may be one-time advisory or multi-stage design commissions spanning 12–24 months.

Pricing tiers

Go-to-market motion2 records

Distribution channels3 records

Marketing channels7 records

Core offering

C3 Group is a sustainability and building services design consultancy delivering integrated decarbonisation solutions for UK organisations. The firm provides strategic advisory (carbon reduction plans, net zero roadmaps, strategic energy partner retainers), technical design (M&E and building services design across RIBA Stages 1-6 with BIM and energy modelling), and project delivery support — including PSDS and Salix grant funding application support — for public sector, education, healthcare, and commercial clients.

Product overview

C3 Group is a sustainability and building services design consultancy providing an integrated portfolio of decarbonisation services. The core offering spans strategic advisory (Road Map to Net Zero/Carbon Reduction Plans, Strategic Energy Partner retainers) through technical delivery (Building Services M&E Design with BIM, Heat Decarbonisation Plans, Renewables Feasibility). The End-to-End Decarbonisation Solutions service connects early-stage feasibility through RIBA Stages 1-6 design, while Net Zero Project Management handles execution. Delivery is supported through the GW Power partnership for construction and installation. Supporting services include Funding & Business Case Support for PSDS/Salix applications, Low Carbon Feasibility Studies, and Energy Management. The company operates primarily in the UK public and commercial sectors across education, healthcare, local government, and commercial real estate.

Differentiator

Problem solved

Functional benefit

Products and services

• Road Map to Net Zero / Carbon Reduction Plan Bespoke strategic roadmap assessing energy usage, emissions data, and sustainability initiatives to develop specific actions and investments for reducing carbon footprint. Aimed at UK organisations across public sector, education, healthcare, and commercial estate management.
• End-to-End Decarbonisation Solutions Full decarbonisation journey from early-stage feasibility and planning through to technical design and delivery management, including energy audits, RIBA Work Stages 1-6 design, and low-carbon/renewable energy solutions. Targeted at UK organisations seeking turnkey decarbonisation of their estates.
• Net Zero Project Management Seamless project management for net zero transitions covering consultation, planning, technology integration (solar, heat pumps, energy storage), and coordination with architects and contractors. Aimed at organisations executing decarbonisation capital projects.
• Building Services Design (M&E Design) Sustainable mechanical and electrical design covering heating/cooling load assessments, low-carbon system design (ASHPs, GSHPs, WSHPs, VRF/VRV), solar PV, battery storage, EV charging, BMS integration, and BIM modelling across RIBA Stages 1-6. Targeted at UK organisations undertaking new build or retrofit M&E projects.
• Heat Decarbonisation Plan Technical assessment and planning for transitioning from fossil fuel heating systems to low-carbon alternatives such as heat pumps. Aimed at UK estate owners seeking to meet heat decarbonisation targets.
• Renewables Feasibility Technical and financial analysis evaluating low-carbon and renewable technologies including heat pumps, solar PV, battery storage, and ventilation upgrades. Used by organisations assessing renewable energy investments.
• Funding and Business Case Support Support for developing business cases for public and private funding including Public Sector Decarbonisation Scheme (PSDS) and Salix funding applications. Aimed at organisations seeking grant funding for energy efficiency projects.
• Public Sector Decarbonisation Scheme (PSDS) Support Consultancy services navigating PSDS and Salix Funding process, including project identification, application preparation, project management, and installation support. Targeted at UK public sector bodies and qualifying organisations.
• Strategic Energy Partner Ongoing structured advisory support with tiered retainers (Bronze, Silver, Gold) providing strategic review, action tracking, and technical advisory for long-term estate management. Aimed at organisations seeking continuous sustainability partnership.
• Estate Energy Snapshot Initial assessment of carbon performance and energy usage across an organisation's estate, providing a baseline for net zero planning. Aimed at UK organisations beginning their decarbonisation journey.
• Technical Design and Delivery Support Technical design services and delivery partner coordination for building services and decarbonisation projects, linking C3 Group design output with the GW Power sister-company delivery partner for installation.
• Low Carbon Feasibility Studies Economic-driven analysis evaluating low carbon solutions including renewable energy systems and energy-efficient buildings with estimated costs, timelines, and potential savings. Targeted at organisations weighing decarbonisation investment options.
• Decarbonisation Strategic Phasing Strategic planning approach balancing existing systems with phased heat pump, solar PV, and battery storage integration to achieve grid dependency. Aimed at organisations with phased capital investment plans.

Quantifiable outcome

• £14.3M+ in public sector grant funding secured for clients in 2025 alone through PSDS
• +2 more outcomes

Named customers7 records

Segments5 records

Ideal customer profiles4 records

Technology focussed No

API detail

Has API

No

API docs

API detail

Core technology

AI maturity

App detail

AI capability2 records

Feature4 records

Partnerships

Five partnerships are on record, tiered core and minor.

• GW PowercoreImplementation/ SI/ Consulting PartnerGW Power operates as C3 Group's sister company and preferred delivery partner, providing installation and construction execution capability for building services and energy efficiency projects designed by C3 Group. This vertical integration enables C3 Group to offer clients a seamless design-to-delivery service for decarbonisation and building services projects.
• Gate and BarcoreGTM or Marketing PartnerGate and Bar partnered with C3 Group on Public Sector Decarbonisation Scheme (PSDS) funding applications, working collaboratively to support organisations in accessing government grant funding for energy efficiency and heat decarbonisation projects.
• Thrive Academy TrustcoreStrategic or Co-development PartnerC3 Group entered into a strategic partnership with Thrive Academy Trust to deliver sustainability strategy, net zero roadmaps, and building services design across the trust's school estate. The partnership is a reference account demonstrating C3 Group's expertise in the education sector.
• Hull City CouncilminorGTM or Marketing PartnerHull City Council collaborated with C3 Group on joint educational webinars focused on energy efficiency, decarbonisation, and net zero planning for public sector and community organisations in the Hull area.
• Investors in the Environment (iiE)minorOthersC3 Group works with Investors in the Environment (iiE), a regional environmental accreditation scheme, to achieve and maintain Green Status certification. The relationship provides external validation of C3 Group's own sustainability practices and connects the firm with the iiE network of environmentally committed organisations.

Scale indicators5 records

Recent moves6 records

Expansion highlights6 records

Direct peers

• Hoare Lea: UK-based building services engineering and sustainability consultancy delivering M&E design, decarbonisation, and energy modelling across the built environment. Closely comparable to C3 Group on building services design, BIM, and net zero strategy, though at significantly larger national scale.
• AES Sustainability Consultants: UK sustainability and energy efficiency consultancy providing decarbonisation strategy, ESOS/SECR compliance, and PSDS support to public sector and commercial clients — directly overlapping with C3 Group's core service portfolio.
• Etude Energy: Independent UK energy and sustainability consultancy offering decarbonisation roadmaps, heat network design, and net zero advisory to public sector and education clients — a closely comparable niche consultancy.
• Verco: UK-based sustainability and carbon consultancy delivering net zero strategy, building performance, and ESG advisory to public and private sector clients — closely comparable niche peer to C3 Group.

Broad incumbents

• Carbon Trust: Major UK-based climate and sustainability advisory organisation providing carbon footprinting, decarbonisation strategy, and green finance advisory to public and private sector clients. Overlaps with C3 Group's net zero planning but operates at significantly larger scale.
• WSP: Global engineering and design consultancy with a substantial UK building decarbonisation and PSDS advisory practice. Competes with C3 Group on building services design and public sector decarbonisation engagements at national scale.
• AECOM: Global infrastructure consultancy with UK sustainability and decarbonisation services spanning net zero strategy, building services, and PSDS delivery. Overlaps with C3 Group's public sector and education offerings.
• Arup: Global engineering consultancy with deep UK sustainability, building services, and net zero advisory practices serving public sector, healthcare, and education clients — a large-scale overlap with C3 Group's service lines.
• Ramboll: International engineering, sustainability, and decarbonisation consultancy with a UK building services and energy transition practice serving public sector clients. Provides broader scope but overlaps with C3 Group's core offerings.
• Buro Happold: Engineering consultancy with UK building services, energy, and decarbonisation expertise across public sector and education estates — competes with C3 Group on M&E design and net zero planning.

Market position

Strengths5 records

Weaknesses5 records

Competitive moat4 records

Key risks5 records

Key highlights6 records

Customer concentration

• Xx.com/C3Group_UK
• Facebookfacebook.com/c3groupuk
• LinkedInlinkedin.com/company/c3-group-yorkshire
• Instagraminstagram.com/c3group_uk

Compliance5 records

Revenue estimate

Valuation estimate

Number of profiles

Profiles2 records

Funding overview

Funding rounds1 record

Investors1 record

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 C3 Group