Carnell Warren Associates

What Carnell Warren Associates does

Carnell Warren Associates is a UK-based building services engineering consultancy founded in 1991 by Wendy Warren, who continues to lead the firm as Managing Director. The company provides Mechanical, Electrical and Public Health (MEP) engineering design and specification services across the full project lifecycle — from feasibility and acquisition surveys through to design, commissioning, and maintenance specification — for both traditional and design-build contractor arrangements. Core technical work covers HVAC, heating, comfort cooling, ventilation, plumbing, electrical distribution, specialist lighting design, security and life protection systems, AV distribution, acoustic plant design, and SuDS reports, supported by industry-standard tools including AutoCAD, Revit, Amtech, and Cymap for 2D drafting, 3D BIM modelling, electrical calculations, and building services calculations.

The consultancy serves enterprise clients primarily across three verticals: luxury residential property developers and private clients (Mayfair, Knightsbridge, Chelsea, Esher refurbishments and new builds), the hospitality sector (London Hilton Metropole, Como Hotels, Active Hospitality's Gorse Hill Hotel), and commercial property investors undertaking office-to-residential conversions and mixed-use developments (Sino Reit, Fenton Whelan, Manhurley Limited, UK Developments). The firm also delivers smaller-scale work for charities and heritage refurbishments, and operates an embedded referral model with a bench of London architectural practices (Wolff, Nash Baker, Smallwood, BB, Nash Baker, Douglas and King, among others) and project management firms (BTP, Optima, Huntley Cartwright).

The business operates as a privately held, founder-owned UK limited company with 11-50 employees, headquartered in Woking, Surrey. Revenue is generated through project-based professional services fees quoted on a scope-specific basis; pricing is not publicly disclosed. The go-to-market is enterprise field sales with direct client engagement — referrals from architects and a website portfolio of completed projects drive inbound enquiry, while project commissions come from developers, architects, end users, lenders, and contractors. Geographic delivery spans Greater London, Surrey, Berkshire, and Reading, with a pragmatic engineering philosophy combining established building services practice with selective adoption of sustainable and renewable technologies.

Name

Carnell Warren Associates

Legal name

Carnell Warren Associates Ltd

Website

https://carnellwarren.co.uk

Company type

Private

Founded year

1991

Operating status

Operating

Headcount range

11–50 employees

Short description

Carnell Warren Associates is a UK-based building services engineering consultancy, founded in 1991 in Woking, Surrey, that designs Mechanical, Electrical, and Public Health systems for luxury residential, hospitality, and commercial property clients across Greater London and the home counties.

Ownership category

akta.pro rank

Product category

Building Services Engineering Consultancy (MEP)

NAICS

Engineering Services (541330), Engineering Services (54133), Architectural, Engineering, and Related Services (5413)

SIC

Services-Engineering Services (8711)

akta.pro primary industry

MEP (Mechanical, Electrical & Plumbing) Engineering Consulting (BPAHAIAE)

akta.pro secondary industries

Energy Optimization & Retro-Commissioning for MEP Systems (BPABACAL), Building Information Modeling (BIM) & Digital Design Services (BPAHAKAK)

Keywords

• Building services engineering
• MEP design consultancy
• HVAC design services
• Electrical engineering design
• Lighting design consultancy

Headquarters

HQ city

Woking

HQ country

United Kingdom

HQ region

Europe

Offices1 record

Markets served

GTM type

B2B

Offering type

Services

Cost components

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

Revenue model

1. Engineering Consultancy Services: Professional engineering consultancy services providing design expertise in Mechanical, Electrical and Public Health Engineering. Revenue generated through project-based fees for design, specification, project management, and procurement services. Operates across both traditional and design-build contractor arrangements.

Go-to-market motion1 record

Distribution channels1 record

Marketing channels3 records

Core offering

Carnell Warren Associates provides Mechanical, Electrical and Public Health (MEP) engineering design, specification, project management and procurement services for residential and commercial building projects. The firm's work spans the full building lifecycle from feasibility studies and acquisition surveys through detailed design, 3D BIM modelling and CAD draughting to commissioning management and maintenance specification. Specialist offerings include lighting design, HVAC plant upgrades, heat recovery retrofits, acoustic plant design, energy strategies and Part L compliance, and security/life protection systems.

Product overview

Carnell Warren Associates is a Building Services Engineering Consultancy offering a unified suite of MEP (Mechanical, Electrical, and Public Health) engineering services. The company provides end-to-end building services covering the full project lifecycle from feasibility studies through to commissioning and maintenance. Core offerings include MEP design and specification, project management, 3D CAD modelling using AutoCAD and Revit, energy strategies with Part L compliance, and specialist services including lighting design, acoustic plant design, HVAC upgrades, and security systems. The company serves diverse sectors including luxury residential, hospitality, commercial office, and charitable organizations across Greater London and Surrey.

Differentiator

Problem solved

Functional benefit

Products and services

• MEP Design and Specification Services Mechanical, Electrical and Public Health engineering design services covering the full building lifecycle from feasibility through to maintenance, including HVAC, heating, cooling, ventilation, electrical systems, and plumbing design for residential and commercial projects.
• Condition and Acquisition Surveys Technical surveys assessing the condition of building mechanical and electrical systems for property acquisition or assessment purposes.
• Feasibility Reports and Studies Engineering feasibility studies and reports including M&E cost advice and sustainability statements for planning applications.
• Energy Strategies and Audits Energy strategy development, energy audits, Part L compliance calculations, and sustainability reports for planning approval.
• Specialist Lighting Design Specialized lighting design services for residential and commercial properties.
• Commissioning Management Management of building services commissioning processes to ensure proper installation and operation of mechanical and electrical systems.
• 3D Modelling and CAD Draughting 3D BIM modelling using Revit and 2D draughting using AutoCAD for mechanical and electrical installations.
• Building Services Maintenance Specification Specification and procurement services for building services maintenance.
• HVAC Plant Upgrades and Heat Recovery Retrofits Upgrading HVAC plant equipment and implementing heat recovery systems including ground source heat pumps and solar thermal/photovoltaics.
• M&E Project Management and Procurement Project management and procurement services for mechanical and electrical works.
• Acoustic Plant Design Acoustic design services for plant equipment including bespoke acoustic attenuation solutions.
• Security and Life Protection Systems Design and integration of intruder alarms, fire detection and alarm systems, door entry systems, and CCTV for security and life protection.
• Audio Visual Distribution Systems Design of TV, Sky distribution, and audio visual distribution systems for residential and commercial properties.
• Plant Design Services Specialist plant design services including hot and cold water pressure systems, water filtration and treatment, and complex heat source systems.
• SuDS Reports and Design Sustainable Drainage Systems (SuDS) reports and design services for planning applications.
• M&E Troubleshooting Diagnostic and troubleshooting services for existing mechanical and electrical installations.

Named customers15 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

Feature5 records

Partnerships

17 partnerships are on record, tiered minor.

• Douglas and KingminorImplementation/ SI/ Consulting PartnerArchitectural practice engaged as architect for Sino Reit Ltd project at 131 High St, West Drayton (restaurant refurbishment and office conversion).
• MBH Design StudiominorImplementation/ SI/ Consulting PartnerArchitectural studio serving as architect for Manhurley Limited project at 77-83 Bell Street, Reigate.
• Simon Brown ArchitectsminorImplementation/ SI/ Consulting PartnerArchitectural practice engaged for Clare Hill, Esher high-end residential project.
• Locus DesignminorImplementation/ SI/ Consulting PartnerInterior design firm for Clare Hill, Esher project.
• O&D ConstructionminorImplementation/ SI/ Consulting PartnerMain contractor for Clare Hill, Esher new build high-end residential project.
• Robert Hirschfield ArchitectsminorImplementation/ SI/ Consulting PartnerArchitectural practice for 90 Wise Lane residential project.
• 23 ArchitectureminorImplementation/ SI/ Consulting PartnerArchitectural practice engaged for 7 Tregunter Road renovation and plant design projects.
• Nash Baker ArchitectsminorImplementation/ SI/ Consulting PartnerArchitectural practice for Knightsbridge Town House project featuring solar roof, air source heat pump, and MVHR.
• Campbell ArchitectsminorImplementation/ SI/ Consulting PartnerArchitectural practice for 36 Dover Street office-to-penthouse conversion project.
• Wolff ArchitectsminorImplementation/ SI/ Consulting PartnerArchitectural practice for multiple projects including Lonsdale Road pub conversion and Connaught House town houses.
• PLD ArchitectsminorImplementation/ SI/ Consulting PartnerArchitectural practice for Sidmouth Street student accommodation refurbishment project.
• Smallwood ArchitectsminorImplementation/ SI/ Consulting PartnerArchitectural practice for 1a Walton Street (£50m mansion refurbishment in Chelsea).
• BTPminorImplementation/ SI/ Consulting PartnerProject management firm for 77-83 Bell Street, Reigate project.
• OptimaminorImplementation/ SI/ Consulting PartnerProject management firm for 36 Dover Street project.
• Huntley CartwrightminorImplementation/ SI/ Consulting PartnerProject management firm for 1a Walton Street project.
• BB architectsminorImplementation/ SI/ Consulting PartnerArchitectural practice for Apex House St Albans permitted development scheme.
• Amelia CarterminorImplementation/ SI/ Consulting PartnerArchitect for Hyde Park Garden Mews basement excavation and refurbishment project.

Scale indicators2 records

Recent moves5 records

Expansion highlights4 records

Broad incumbents

• WSP UK: Global professional services firm with a substantial UK building services and MEP practice. Competes for the same London development and refurbishment projects but with far greater resources and cross-sector reach.
• Arup: Global engineering consultancy with deep UK building services and sustainability practices. Overlaps on commercial and high-end residential MEP design but operates at vastly greater scale.
• Mott MacDonald: International engineering, management, and development consultancy with UK building services capability. Serves some of the same commercial and infrastructure clients as Carnell Warren but at significantly larger scale.
• Buro Happold: International engineering consultancy with MEP, sustainability, and structural design capabilities. Competes on complex London and heritage projects but with a much wider service portfolio.
• Sweco UK: European engineering consultancy with a sizeable UK building services practice serving commercial, residential, and infrastructure clients. Overlaps with Carnell Warren on MEP design but at significantly greater scale and broader sector coverage.

Direct peers

• Cundall: Multi-disciplinary engineering consultancy with a strong MEP and sustainability practice serving UK and international projects. Comparable in service breadth and project mix, though at a larger scale.
• Max Fordham: UK MEP engineering consultancy with strong sustainability and high-end residential credentials, including heritage and Passivhaus projects. Directly comparable engineering-services offering and client mix.
• Hilson Moran: London-headquartered building services engineering consultancy providing MEP, sustainability, and vertical transportation design. Direct peer in the London luxury residential, hospitality, and commercial refurbishment market.
• Hoare Lea: UK-based building services engineering consultancy offering MEP design across commercial, residential, and heritage sectors. Closely comparable to Carnell Warren in core service lines, with a larger national footprint but overlapping luxury London residential client base.
• Michael Popper Associates: Independent London-based mechanical and electrical building services consultancy. Comparable small-to-mid-sized UK MEP practice serving residential, commercial, and hospitality clients in the Greater London market.

Market position

Strengths4 records

Weaknesses4 records

Competitive moat3 records

Key risks1 record

Key highlights6 records

Customer concentration

• Xx.com/carnell_warren

Revenue estimate

Valuation estimate

Number of profiles

Profiles1 record

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 Carnell Warren Associates