McDonald Brown

What McDonald Brown does

McDonald Brown Ltd is a family-owned mechanical and electrical (M&E) installation, design, and maintenance contractor headquartered in Upminster, Essex, United Kingdom, trading for over 40 years since circa 1983. The company operates as a single integrated service provider across eight service lines—Electrical Installation, Mechanical Installation, Air Conditioning, Fire Protection and Prevention, Heating and Ventilation, Planned Preventative Maintenance (PPM), CCTV/Access Control, and CAD Facilities—serving enterprise and government clients across London and South East England, including the Metropolitan Police, the Royal Air Force, the Ministry of Defence, the NHS, University College London, Thames Water, PricewaterhouseCoopers, Costco Wholesale, Grosvenor Estates, and construction majors Wates, Vinci Construction, and Balfour Beatty.

The company's technical capability is grounded in traditional building-services engineering rather than digital platforms. Its in-house CAD department produces full design and as-built drawings with Operation and Maintenance Manuals, and a London-based fabrication workshop enables bespoke manufacturing of mechanical and steel components within short timeframes. It is an authorized Daikin D1 installer and holds NICEIC and ECA electrical accreditations, Gas Safe registration for plumbing and heating, ISO 9001:2000 quality certification for fire systems work, and Nebosh Level 5 and IOSH safety certifications. Critically, every engineer is CTC (Counter Terrorism Check) security-cleared, enabling access to sensitive government and defence sites, and management is entirely apprentice-trained across all disciplines.

The business model is project-based enterprise sales with contract values up to £3 million for electrical installation work and £2 million of professional indemnity cover on design, generating revenue through one-time installation contracts and recurring PPM/service relationships. The company has no disclosed revenue figures, no funding rounds, no M&A activity, and remains privately held by the founding family. Marketing is conducted primarily through displayed accreditations, social media, and community engagement (charity sponsorships and an annual golf day), and the firm has no app, no API, and no digital product surface. Geographic scope is confined to London and the South East, and headcount is reported at 11–50 employees.

Name

McDonald Brown

Legal name

McDonald Brown Limited

Website

https://mcdonaldbrownltd.co.uk

Company type

Private

Founded year

1983

Operating status

Operating

Headcount range

11–50 employees

Short description

McDonald Brown Ltd is a family-run UK mechanical and electrical installation, design, and maintenance contractor serving government agencies and large enterprises across London and South East England through eight integrated M&E service lines.

Ownership category

akta.pro rank

Headquarters

HQ city

London

HQ country

United Kingdom

HQ region

Europe

Offices1 record

Markets served

GTM type

B2B

Offering type

Services

Cost components

Personnel, Operations, Supply Chain, Marketing or Sales, Others

Revenue model

1. Electrical Installation Services: Design, installation, reactive and planned maintenance services for electrical systems. Contract values up to £3 million. Holds PI for £2M design.
2. Mechanical Installation Services: Heating, ventilation, plumbing, sheet metal and steel fabrication services with in-house manufacturing capability.
3. PPM/Service Contracts: Full client liaised Planned Preventative Maintenance (PPM) service with 24/7 reactive call centre coverage.
4. CCTV and Access Control: Design, installation and maintenance of security systems including CCTV, access control, and integrated security and fire systems.
5. Fire Protection Services: Design, installation, commissioning/verification, service and maintenance of fire detection and alarm systems.
6. Air Conditioning Services: Design and installation, PPM and service for comfort cooling systems. Daikin D1 installer offering extended warranty on products.

Pricing tiers

Go-to-market motion1 record

Distribution channels1 record

Marketing channels3 records

Core offering

McDonald Brown Limited is a family-run mechanical and electrical (M&E) installation contractor that delivers electrical, mechanical, air conditioning, fire protection, heating and ventilation, security (CCTV/access control), and CAD design services. The firm also provides planned preventative maintenance (PPM) and ongoing service contracts to commercial and public-sector clients.

Product overview

McDonald Brown is a family-owned M&E (mechanical and electrical) installation company trading for over 40 years. The company operates as a unified service provider offering eight interconnected service lines: Electrical Installation, Mechanical Installation, Air Conditioning, Fire Protection and Prevention, Heating and Ventilation, PPM/Service, CCTV/Access Control, and CAD Facilities. These services are delivered by trained engineers across London and South East, with capabilities spanning design, installation, commissioning, and maintenance. The in-house CAD Facilities department supports all service lines with design drawings and O&M manuals, while the 24/7 reactive call centre enables PPM/Service to support ongoing maintenance needs across all disciplines.

Differentiator

Problem solved

Functional benefit

Products and services

• Electrical Installation Design, supply, and installation of commercial electrical systems for new-build and refurbishment projects across commercial, public, and industrial sites.
• Mechanical Installation Installation of mechanical building services including pipework, plant, and plant rooms for commercial and public-sector buildings.
• Air Conditioning Supply, installation, and servicing of commercial air conditioning systems for offices, retail, healthcare, and other commercial premises.
• Fire Protection Design, installation, and commissioning of fire detection, alarm, and suppression systems to meet regulatory and insurance requirements.
• Heating and Ventilation Installation and servicing of commercial heating, boiler, and ventilation systems for buildings across multiple sectors.
• PPM / Service & Maintenance Planned preventative maintenance and reactive service contracts covering electrical, mechanical, HVAC, fire, and security assets for ongoing building operations.
• CCTV and Access Control Design, installation, and integration of CCTV surveillance and access control security systems for commercial and public-sector buildings.
• CAD Facilities (Design) In-house CAD design and drafting services for M&E building services layouts and coordinated installation drawings.

Quantifiable outcome

• Contract values up to £3 million for electrical installation work.
• +2 more outcomes

Named customers13 records

Segments3 records

Ideal customer profiles2 records

Technology focussed No

API detail

Has API

No

API docs

API detail

Core technology

AI maturity

App detail

Feature3 records

Partnerships

Five partnerships are on record, tiered core and minor.

• DaikincoreTechnology or IntegrationAuthorized Daikin D1 installer. As a Daikin D1 installer, the company can offer extra warranty on products coupled with priority service from the manufacturers.
• Vinci ConstructioncoreStrategic or Co-development PartnerStrategic partnership with major construction company for building projects.
• Balfour BeattycoreStrategic or Co-development PartnerStrategic partnership with major construction company for building projects.
• OverburyminorStrategic or Co-development PartnerClient and construction partner relationship.
• Cofely GDF SuezminorStrategic or Co-development PartnerClient and partner relationship in facilities management.

Scale indicators3 records

Recent moves6 records

Expansion highlights4 records

Direct peers

• Dodd Group: Mid-sized UK M&E and building services contractor offering electrical, mechanical, HVAC and maintenance services to public and commercial sectors; a strong size-comparable peer to McDonald Brown.
• NG Bailey: UK-based independent M&E contractor delivering electrical, mechanical, HVAC and facilities services across multiple sectors; the closest mid-sized direct peer to McDonald Brown's multi-discipline M&E offering.

Broad incumbents

• Kier Group: UK infrastructure, construction and facilities services group with M&E capability serving government and regulated clients overlapping McDonald Brown's customer base.
• Johnson Controls: Global HVAC, building controls and security systems provider; directly comparable on the air conditioning, CCTV/access control and building systems integration service lines McDonald Brown offers.
• Skanska: Swedish-headquartered construction and facilities services group with a sizeable UK building services practice serving government, healthcare and commercial clients comparable to McDonald Brown's segments.
• Wates Group: UK construction and property services group with M&E capability and named McDonald Brown client/partner; comparable on enterprise and government project mix.
• Balfour Beatty: Major UK construction and infrastructure group with significant M&E building services capability; named McDonald Brown construction partner and serves overlapping government and enterprise clients.
• Mitie Group: UK-listed facilities services and engineering group offering electrical, mechanical, HVAC and fire services to enterprise and government clients — a much larger, multi-region peer operating across the same service lines as McDonald Brown.
• ENGIE (formerly Cofely): Global energy and facilities services group with a UK HVAC, mechanical and FM practice; listed as a McDonald Brown partner and directly comparable across air conditioning, heating and maintenance services.
• Vinci Construction: International construction group with UK M&E building services capability; named McDonald Brown strategic partner and overlapping on large commercial and government projects.

Market position

Strengths4 records

Weaknesses4 records

Competitive moat5 records

Key risks5 records

Key highlights7 records

Customer concentration

• LinkedInlinkedin.com/company/mcdonald-brown-limited

Compliance2 records

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 McDonald Brown