HCS Mechanical Services

What HCS Mechanical Services does

H Clarke & Sons Ltd (formerly HCS Mechanical Services) is a UK-based mechanical, electrical, and property services contractor operating across England and Scotland. The business is a family-run company with three generations of operating history, registered in England and Wales as H Clarke & Sons Ltd (CRN 04643501) and operating under the holding group Harry Clarke Holdings. Service delivery is organized through two regional hubs: a headquarters and England operations base in Northallerton, North Yorkshire, and a Scotland operations office in East Kilbride near Glasgow, supported by 51–100 employees in total. Customer segments are commercial businesses, government and public sector organizations, and housing associations, with housing association work particularly emphasized for the Scotland office.

The service portfolio spans mechanical services (heating, plumbing, drainage installation, maintenance and repair), electrical services (from minor works to full fit-outs), HVAC installation and maintenance, drainage, and broader property services including fit-outs and adaptations. Delivery is field-based: enquiries are routed to local engineering teams in either region, and work is carried out by qualified engineers operating under UK trade certifications including Gas Safe, NICEIC, OFTEC, Refcom, and Constructionline, alongside ISO 9001, ISO 14001, and ISO 45001 management system certifications. The offering is structured as integrated multi-trade support rather than discrete product modules, combining planned maintenance programs with reactive repair support.

Commercially, the firm runs a professional services revenue model based on contract and quote-based pricing for installation, maintenance, and specialist project work. The go-to-market is enterprise field sales — direct contractor relationships with commercial, public sector, and housing clients — with the company website as the primary digital presence and no app or platform offering. The entity sits within the broader Harry Clarke Holdings group, alongside Clarke's Environmental, Harry Clarke & Sons Ltd, EA Gibbs, Clarke's Building Solutions, Fibre Vault, and HCS Building Services, implying internal cross-trade resource and customer overlap within the family-owned portfolio.

Name

HCS Mechanical Services

Legal name

H Clarke & Sons Ltd

Website

https://hcsmechanical.co.uk

Company type

Private

Founded year

1920

Operating status

Operating

Headcount range

51–100 employees

Short description

H Clarke & Sons Ltd (formerly HCS Mechanical Services) is a UK family-run mechanical, electrical, and property services contractor delivering installation, planned maintenance, and reactive support to commercial, public sector, and housing association clients across England and Scotland.

Ownership category

akta.pro rank

Product category

Mechanical & Electrical Contracting Services

NAICS

Plumbing, Heating, and Air-Conditioning Contractors (238220)

SIC

Services-To Dwellings & Other Buildings (7340)

akta.pro primary industry

New Construction HVAC Rough-In & Final Set (Residential/Light Commercial) (HSAOAGAL)

Keywords

• Mechanical contracting services
• HVAC installation maintenance
• Commercial plumbing services
• Electrical contracting services
• Property maintenance services

Headquarters

HQ city

Northallerton

HQ country

United Kingdom

HQ region

Europe

Offices2 records

Markets served

GTM type

B2B

Offering type

Services

Cost components

Personnel, Operations, Supply Chain, Others

Revenue model

1. Mechanical and Electrical Services: Revenue generated from installation, maintenance, and specialist project services for mechanical, electrical, heating, drainage, and HVAC systems delivered to commercial, public sector, and housing clients.

Go-to-market motion1 record

Distribution channels1 record

Marketing channels1 record

Core offering

H Clarke & Sons Ltd (formerly HCS Mechanical Services) provides mechanical, electrical, plumbing, heating, drainage, HVAC, fit-out, and adaptation services through installation, planned maintenance, and reactive support. Services are delivered by qualified engineers to commercial, public sector, and housing association clients across England and Scotland.

Product overview

HCS Mechanical Services (now H Clarke & Sons Ltd) operates as a services company offering a unified portfolio of mechanical, electrical, and property services. The company provides installation, planned maintenance, and reactive support through regional teams in England (based in North Yorkshire) and Scotland (near Glasgow). Services are delivered as an integrated offering rather than discrete product modules, with qualified engineers providing multi-trade support including plumbing, heating, electrical work, drainage, HVAC, fit outs, and adaptations for commercial, public sector, and housing clients.

Differentiator

Problem solved

Functional benefit

Products and services

• Mechanical Services Installation, maintenance, and repair of mechanical systems including heating, plumbing, and drainage for commercial, public sector, and housing clients.
• Electrical Services Electrical installation, maintenance, and repair services covering everything from minor works to full electrical fit outs for commercial, public sector, and housing clients.
• HVAC Services Heating, ventilation, and air conditioning installation and maintenance services for commercial, public sector, and housing clients.
• Property Services General property maintenance, fit outs, and adaptations for housing associations and commercial clients.
• Planned Maintenance Scheduled maintenance programmes to keep client sites running smoothly and prevent breakdowns, delivered by qualified engineers across England and Scotland.
• Reactive Maintenance Emergency and responsive repair services for urgent mechanical and electrical issues across England and Scotland.
• Drainage Services Drainage installation and maintenance services delivered across England operations.

Segments3 records

Ideal customer profiles3 records

Technology focussed No

API detail

Has API

No

API docs

API detail

Core technology

AI maturity

App detail

Scale indicators1 record

Recent moves5 records

Expansion highlights4 records

Direct peers

• Mitie Group plc: UK-listed facilities services and mechanical & electrical contractor serving commercial and public sector clients across England and Scotland. Highly comparable in service mix (planned maintenance, HVAC, electrical) and customer segments, though operating at materially larger scale than HCS.
• TClarke plc: London-listed UK mechanical and electrical contractor focused on building services for commercial, public sector, and residential clients. Closely comparable in service portfolio (M&E installation, maintenance) and UK-centric operating footprint.
• EMCOR Group (UK): Global mechanical & electrical services and facilities services provider with significant UK operations. Directly comparable in core offering (HVAC, electrical, plumbing, building services) and target customers (commercial, industrial, institutional).
• JSM Group: UK mechanical and electrical services contractor delivering planned and reactive maintenance, HVAC, and electrical fit outs to commercial and public sector clients. Closely comparable in trade mix and customer segmentation.
• SPIE UK: European technical services group delivering mechanical, electrical, HVAC, and energy services to commercial and public sector clients in the UK. Comparable multi-trade service model and customer base, though operating at larger scale across multiple geographies.

Broad incumbents

• Balfour Beatty plc: Large UK-listed infrastructure and construction group with building services and M&E capabilities. Competes in adjacent spaces (commercial building services, public sector frameworks) but from a much larger construction-led platform.
• ENGIE UK: Major energy and building services incumbent operating across HVAC, facilities management, and energy efficiency in the UK. Overlaps with HCS in HVAC and mechanical services but operates as part of a much wider portfolio targeting large enterprises.
• Serco Group plc: UK-listed public sector services group with facilities maintenance and building services offerings. Comparable in the public sector and housing association maintenance segments, though operates as a much broader outsourced services platform.

Market position

Strengths5 records

Weaknesses5 records

Competitive moat4 records

Key risks6 records

Key highlights7 records

Customer concentration

• Xx.com/hcsmechanical
• Facebookfacebook.com/hcsmechanical
• LinkedInlinkedin.com/company/hcsmechanical

Compliance9 records

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 HCS Mechanical Services