What Delta House Group does

Delta House Group is a UK private limited company, founded in 1993 and headquartered in Maidstone, Kent, operating as a bespoke mechanical services contractor across London and the South East of England. The company designs, installs, maintains and repairs air conditioning systems (including VRF/VRV platforms from Daikin, Mitsubishi Electric and Toshiba), commercial and residential ventilation systems, heating and plumbing works, and air-source heat pump renewable installations. It sells primarily to commercial property end-users — offices, warehouses, retail, education facilities — and to residential developers and homeowners, delivered through a direct field-sales motion with free site surveys and a concept-to-handover project model.

The business combines project-based mechanical installation revenue with a recurring preventive-maintenance and breakdown-repair stream, supported by F-Gas certified operatives and accreditations including Constructionline Gold, SafeContractor (SSIP), Daikin D1, Toshiba T7, and Diamond Quality Partner. Documented case studies include Central London office refurbishments (Castle Lane, India House, Crayfields), a 43,036 sq. ft BREEAM Excellent / Net Zero Carbon warehouse retrofit at Premier Park in West London, a 123-home residential energy centre at Earlsfield in South London, sanitaryware installations across 80 residential apartments, and a school plant-room replacement in North London. Customer breadth spans enterprise offices, residential developers, logistics/warehouse operators and government/education clients within the South East geography.

The operating model is family-run, with directors carrying 25+ years of mechanical engineering experience each, contracts managers with 20+ years each, and over 75 years combined experience within just two team members. The company is incorporated as a private limited entity with no subsidiaries, no external investors disclosed, and no public listing; revenue, total headcount, and financial performance are not publicly disclosed.

Name

Delta House Group

Legal name

Delta House Group

Website

https://delta-house.co.uk

Company type

Private

Founded year

1993

Operating status

Operating

Headcount range

1–10 employees

Short description

Delta House Group is a UK mechanical services contractor founded in 1993, based in Maidstone, Kent, that designs, installs and maintains air conditioning, ventilation, heating, plumbing, and heat-pump systems for commercial and residential clients across London and the South East of England.

Ownership category

akta.pro rank

Product category

Mechanical Contracting & HVAC Services

akta.pro primary industry

HVAC & Refrigeration Contracting (IMAFALAB)

Keywords

• Mechanical contracting services
• HVAC installation
• Air conditioning systems
• Ventilation and plumbing
• Renewable heat pumps

Headquarters

HQ city

Maidstone

HQ country

United Kingdom

HQ region

Europe

Offices1 record

Markets served

GTM type

B2B and B2C

Offering type

Services

Cost components

Personnel, Operations, Supply Chain, Marketing or Sales, Technology or R&D, Others

Revenue model

1. Mechanical Installation Services: Project-based mechanical contracting services including design, installation of air conditioning, ventilation, heating, plumbing, and renewables/heat pump systems. Revenue generated through one-time project fees.
2. Service & Maintenance Agreements: Preventive maintenance agreements for air conditioning systems including regular visits, inspections, cleaning, testing, and fast call out response for repairs. Available for both commercial and domestic customers.

Pricing tiers

Go-to-market motion1 record

Distribution channels2 records

Marketing channels3 records

Core offering

Delta House Group is a bespoke mechanical contracting firm that designs, installs, maintains, and repairs air conditioning, ventilation, heating, plumbing, and renewable heat pump systems for commercial and residential clients. It delivers full-package projects from initial concept to handover and offers recurring service and maintenance agreements across London and the South East of England.

Product overview

Delta House Group offers a complete mechanical services package covering design, installation, maintenance and repair. The company provides five core service offerings: Air Conditioning Systems, Ventilation Systems, Heating and Plumbing, Renewables/Heat Pumps, and Service & Maintenance. These services are offered to both commercial and residential clients throughout London and the South East of England. Delta House Group is certified installers for major equipment manufacturers including Daikin, Mitsubishi Electric, Toshiba, Samsung, Panasonic, Vent-axia, Systemair, and Nuaire.

Differentiator

Problem solved

Functional benefit

Products and services

• Air Conditioning Systems Bespoke air conditioning design, installation, maintenance and repair for commercial and domestic properties. Certified installers of major brands including Mitsubishi Electric, Daikin, and Toshiba.
• Ventilation Systems Commercial ventilation solutions including primary and secondary ductwork for fan coil units, heat recovery units, and extract systems. Certified installers of Vent-axia, Systemair, and Nuaire brands.
• Heating and Plumbing Commercial heating and plumbing services including boilers, plant rooms, toilet blocks, and pipework. Installation of equipment from major manufacturers.
• Renewables / Heat Pumps Air source heat pump design and installation, certified with Samsung and Panasonic, used as renewable replacements for conventional gas boilers. Claimed efficiency is over three times that of traditional boilers.
• Service & Maintenance Agreements Preventive maintenance agreements for air conditioning systems for both commercial and domestic customers. Includes regular engineer visits, inspections, cleaning, fast call-out response for repairs, and tailored coverage based on number and type of units.

Quantifiable outcome

• 43,036 sq. ft warehouse space achieved Net Zero Carbon and BREEAM excellent rating at Premier Park, West London
• +1 more outcomes

Named customers5 records

Segments4 records

Ideal customer profiles2 records

Technology focussed No

API detail

Has API

No

API docs

API detail

Core technology

AI maturity

App detail

Feature5 records

Partnerships

Six partnerships are on record, tiered core.

• DaikincoreTechnology or IntegrationCertified installation partner for Daikin VRV comfort cooling/heating systems. Holds Daikin D1 approved status. Installed Daikin systems in multiple projects including Castle Lane and Crayfields office refurbishments.
• Mitsubishi ElectriccoreTechnology or IntegrationCertified air conditioning installer for Mitsubishi Electric products. Installed VRV systems in India House and Premier Park projects.
• ToshibacoreTechnology or IntegrationT7 approved installer for Toshiba air conditioning systems. Installed Toshiba systems in multiple projects including Ely Place and Solent Gate.
• SamsungcoreTechnology or IntegrationCertified Air Source Heat Pump installers for Samsung products. Provides renewable heating solutions using Samsung heat pump technology.
• PanasoniccoreTechnology or IntegrationCertified Air Source Heat Pump installers for Panasonic products. Provides renewable heating solutions using Panasonic heat pump technology.
• ConstructionlinecoreTechnology or IntegrationGold accredited member providing verified Health and Safety compliance for supply chain contractors.

Scale indicators4 records

Recent moves6 records

Expansion highlights4 records

Direct peers

• NG Bailey: UK-based independent MEP and building services contractor offering mechanical, electrical, and HVAC services across commercial and industrial sectors. Directly comparable as a UK mechanical services provider, though significantly larger in scale.
• SPIE UK: UK arm of European multi-technical services group SPIE, providing HVAC, electrical, and mechanical services to commercial and industrial clients. Comparable UK mechanical services delivery model, larger and broader in scope.
• Crown House Technologies: MEP and building services arm of Laing O'Rourke delivering mechanical, electrical, and HVAC packages across UK construction projects. Directly comparable UK mechanical contracting capability, though embedded within a major contractor.

Others

• Mitsubishi Electric UK: UK division of Mitsubishi Electric supplying VRF air conditioning and heat pump systems to commercial and residential customers. Comparable UK HVAC technology ecosystem player, though as an OEM rather than contracting peer.
• Daikin UK: UK arm of global HVAC manufacturer Daikin, a core OEM partner of Delta House. Comparable in that it sells VRV/heat pump systems into the same UK commercial and residential market, though as an equipment manufacturer rather than an installer.
• Bosch Thermotechnology UK: UK division of Bosch's heating and hot water technology business, including heat pump and commercial heating systems. Comparable as a UK HVAC and heat pump technology provider serving overlapping residential and commercial customers.
• Trane UK: Global commercial HVAC manufacturer with UK operations serving commercial and industrial cooling and heating needs. Comparable as a UK HVAC systems provider, though positioned as an OEM and service organisation rather than installation contractor.

Broad incumbents

• Wates Group: Established UK construction and property services group with in-house mechanical and building services capability. Comparable as a UK contractor delivering mechanical scope, but operates as a much broader construction business.
• Baxi UK: Major UK heating solutions manufacturer and service provider, with growing heat pump and renewables offerings. Comparable as a UK heating/HVAC player serving residential and commercial customers, though primarily a manufacturer rather than an installer.
• Skanska UK: Major UK construction and infrastructure group delivering projects including mechanical and building services scope. Comparable as a UK contractor executing mechanical packages on commercial and public-sector projects, though much larger and broader.

Market position

Strengths5 records

Weaknesses5 records

Competitive moat5 records

Key risks6 records

Key highlights7 records

Customer concentration

• LinkedInlinkedin.com/company/delta-house-group

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 Delta House Group