TSG Building Services

What TSG Building Services does

TSG Building Services plc is a UK family-owned multi-disciplinary building services and construction company founded in 1961, delivering mechanical, electrical, heating, plumbing, renewable energy, property refurbishment, and new build services primarily to social housing providers (housing associations) and local authorities. Operating from its Potters Bar, Hertfordshire headquarters and a new Bedford facility opened in December 2024/2025, the company covers the East of England, Greater London, and South East regions, reaching clients via appointments to six major UK housing procurement frameworks — CHIC, Fusion21, Procurement for Housing, NHMF Frameworx, LHC, and Warmworks. Reported turnover was £43m in 2021, with the 2021 figure explicitly described in company materials as 'over £43m', and the business remains privately held under third-generation Thrussell family ownership (Adam Thrussell as sole owner and CEO since May 2018).

The company's service platform rests on a directly employed workforce of 200+ multi-disciplinary tradespeople (plumbers, electricians, heating engineers, plasterers, builders, carpenters), a 30-strong 24/7 UK-based contact centre handling 127,000+ enquiry calls annually, and proprietary operational technology including a SMART Job Allocation System, a bespoke Gas Safe compliant service management system, vehicle tracking, and a customer portal for social housing clients. Recurring revenue is generated through servicing and maintenance contracts covering 70,000+ properties, complemented by one-time installation projects (boilers, renewables, kitchens, bathrooms), framework-based managed services, and new build/modular construction. Pricing is quote-based and negotiated through housing consortium frameworks at standardised rates for specified works.

TSG holds an unusually dense compliance stack for a mid-sized contractor — Gas Safe, NICEIC, MCS, TrustMark, NHBC, Constructionline Gold, ISO 9001/14001/45001, CHAS, SafeContractor, F-Gas, HETAS, BAFE, RECC, and BESA — positioning it to bid on government-funded decarbonisation and retrofit work. The business has won H&V News Domestic Heating Contractor of the Year in 2014, 2016, 2018, and 2020, and operates the in-house TSG Academy, which has trained 450+ apprentices since 2015. Operational scale signals include 1,500+ renewable energy installations since 2010, 1,000+ kitchen and bathroom fittings annually, 100+ full property refurbishments annually, and a 99.7% CP12 LGSR compliance record across all properties covered.

Name

TSG Building Services

Legal name

TSG Building Services plc

Website

https://tsgplc.com

Company type

Private

Founded year

1961

Operating status

Operating

Headcount range

251–500 employees

Short description

TSG Building Services plc is a family-owned UK building services and construction firm delivering mechanical, electrical, heating, renewable, refurbishment, and new build services to housing associations and local authorities across the East of England, Greater London, and South East, via framework agreements with major housing procurement consortiums.

Ownership category

akta.pro rank

Product category

Building Services & Construction

NAICS

Plumbing, Heating, and Air-Conditioning Contractors (238220), Electrical Contractors and Other Wiring Installation Contractors (23821), Electrical Contractors and Other Wiring Installation Contractors (238210)

SIC

Services-To Dwellings & Other Buildings (7340), Cogeneration Services & Small Power Producers (4991)

akta.pro primary industry

Testing, Commissioning & Energization Services (T&C) (IMAFAHAK)

Keywords

• Social housing maintenance
• Mechanical electrical services
• Property refurbishment
• Renewable energy installation
• Building services construction

Headquarters

HQ city

Potters Bar

HQ country

United Kingdom

HQ region

Europe

Offices2 records

Markets served

GTM type

B2B

Offering type

Services

Cost components

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

Revenue model

1. Servicing & Maintenance Contracts: Ongoing service and maintenance contracts for heating systems across 70,000+ properties, including 24/7 emergency response and scheduled servicing
2. Installation Projects: One-time installation of boilers, heating systems, renewable technologies, kitchens, bathrooms, and building works
3. Framework Agreement Contracts: Contracts secured through housing consortium frameworks for planned works, responsive repairs, and specialised services
4. New Build & Construction: Design and build projects, property refurbishments, extensions and modular construction solutions

Pricing tiers

Go-to-market motion2 records

Distribution channels4 records

Marketing channels7 records

Core offering

TSG Building Services plc is a multi-disciplined building services and construction company delivering heating, mechanical, electrical, renewable energy, property refurbishment, kitchen and bathroom, new build, and modular construction services. The company primarily serves UK social housing providers (housing associations and local authorities) under long-term framework agreements, with a directly employed workforce of 200+ skilled tradespeople and a 24/7 contact centre.

Product overview

TSG Building Services plc is a multi-disciplined building services and construction company operating since 1961. The company operates as a unified platform of integrated service divisions: Servicing & Maintenance (managing 70,000+ properties), Mechanical & Renewable (heating and renewable energy solutions), Commercial & Electrical (commercial HVAC and electrical services), Property Refurbishment (kitchens, bathrooms, void works), New Build (construction and modular solutions), backed by a 24/7 Contact Centre and TSG Academy for staff training. The divisions share common infrastructure including 200+ directly employed tradesmen, NHBC accreditation, and framework agreements with major housing associations and local authorities.

Differentiator

Problem solved

Functional benefit

Brands

• TSG Academy: In-house staff training centre launched in 2015, named after founder Peter Thrussell. Provides apprenticeship training for gas, electrical and other building services trades.

Products and services

• Servicing & Maintenance Servicing, maintenance, and 24/7 emergency repairs for domestic and commercial heating systems, covering over 70,000 properties across the UK.
• Mechanical & Renewable Mechanical services and renewable energy installations including boilers, ground source heat pumps, air source heat pumps, solar PV, solar thermal, biomass, and combined heat and power systems for residential and commercial properties.
• Commercial & Electrical Commercial heating maintenance and repairs plus electrical services including emergency lighting, fire alarms, CCTV, PAT testing, rewires, LED lighting installations, and air conditioning systems.
• Property Refurbishment Whole house and void refurbishment services including kitchen and bathroom installations, with over 100 properties fully refurbished annually using directly employed tradesmen.
• New Build Construction services for new build housing developments including design and build, modular solutions, and property construction for social housing clients with NHBC accreditation.
• Modular Solutions

Quantifiable outcome

• 99.7% CP12 LGSR compliance across all properties covered
• +4 more outcomes

Named customers15 records

Segments4 records

Ideal customer profiles3 records

Technology focussed No

API detail

Has API

No

API docs

API detail

Core technology

AI maturity

App detail

Feature4 records

Partnerships

Twelve partnerships are on record, tiered minor and core.

• Dartford Football ClubminorGTM or Marketing Partner · 1 June 2025TSG became Dugout and Women's Tracksuit Sponsor for Dartford FC for the 2025/26 season. This partnership reflects TSG's continued investment in the local community and builds on their ongoing work with Dartford Borough Council.
• Business in the Community - Race at Work CharterminorOthers · 1 July 2022TSG signed the Business in the Community's Race at Work Charter in July 2022. The charter, established by HRH The Prince of Wales in 1995, aims to help organisations recruit from the widest pool of talent and support ethnic minority staff progression.
• Happy Days Children's CharityminorOthers · 1 January 2022Happy Days Children's Charity was TSG's Charity of the Year for 2022. The charity provides vital respite breaks for individuals, families and groups who support children with additional needs aged 3-17, including those with learning difficulties, physical or mental disabilities, and those who have been abused or neglected.
• E.ON UKcoreStrategic or Co-development Partner · 1 June 2021TSG was appointed as a delivery partner for E.ON UK for solar PV installation contracts under the Green Homes Grant scheme. TSG, as a TrustMark registered installer, works with E.ON UK to deliver energy saving improvements to homes in London boroughs.
• Trees for CitiesminorStrategic or Co-development Partner · 1 March 2021TSG Building Services partnered with Trees for Cities in 2021, a charity established in 1993 that plants trees in cities to improve lives. The partnership supports TSG's environmental commitments, corporate social responsibility objectives, and includes employee volunteer schemes for tree planting. Trees for Cities has planted over 1,117,000 trees and engages with over 125,000 volunteers.
• Women into Construction CICminorStrategic or Co-development Partner · 1 April 2020TSG became a member of Women into Construction CIC to ensure equal opportunities in construction and comply with 2010 Equality Act, 2012 Social Value Act, Section 106 requirements, and Considerate Contractors Scheme. The partnership supports diversity and social value requirements.
• CHIC (Central Housing Investment Consortium)coreChannel Partner/ Reseller/ DistributorTSG is appointed to CHIC's Planned Works, Procurement for All - All Under One Roof DPS, and CHIC Newbuild Framework. These framework agreements allow TSG to bid for heating, electrical, and kitchen/bathroom works with housing association members.
• Fusion21coreChannel Partner/ Reseller/ DistributorTSG is appointed to multiple Fusion21 frameworks including Building & Asset Improvement, Heating and Renewables Framework, Workplace and Facilities Framework, Reactive Repairs and Empty Buildings Framework, Decarbonisation Framework, and Refurbishment, Construction, New Build and Modular Buildings Framework, collectively worth hundreds of millions of pounds.
• Procurement for HousingcoreChannel Partner/ Reseller/ DistributorTSG is appointed to Procurement for Housing's Capital Works & Associated Services DPS and Heating Solutions Framework, providing access to national housing sector procurement opportunities.
• NHMF FrameworxcoreChannel Partner/ Reseller/ DistributorTSG is appointed to NHMF Frameworx for Heating Services and Net Zero Carbon Works frameworks, enabling tender opportunities with social housing providers in East of England, Greater London and South East.
• LHC Procurement GroupminorChannel Partner/ Reseller/ DistributorTSG is appointed to LHC's Housing Compliance Framework for asset safety and compliance services including domestic heating, commercial heating, and fixed wire testing.
• WarmworksminorChannel Partner/ Reseller/ DistributorTSG is appointed to Warmworks' Greater South East Energy Hub (GSEEH) Framework for installation of LAD programme works across 15 regional areas including West London, Essex, Bedfordshire, Kent, and others.

Scale indicators8 records

Recent moves10 records

Expansion highlights6 records

Broad incumbents

• Keepmoat Homes: Keepmoat Homes is a UK housebuilder specialising in new-build and refurbishment for social housing providers and registered providers. It overlaps with TSG's New Build and modular solutions capabilities but operates at much greater scale across multiple UK regions.
• Engie UK: Engie UK delivers facility management, energy services, and decarbonisation retrofits to public-sector and housing clients. It is comparable to TSG in energy/renewables service offering but operates as a broad incumbent across multiple adjacent service lines including FM and energy supply.
• Wates Living Space: Wates Living Space provides responsive repairs, maintenance, and planned works to UK social housing providers as part of the broader Wates Group. It is comparable to TSG in customer base and service offering but benefits from the parent group's national footprint and significantly larger financial backing.
• Morgan Sindall Property Services: Morgan Sindall Property Services is a division of Morgan Sindall Group delivering planned maintenance, refurbishment, and responsive repairs to social housing nationally. It overlaps with TSG in service scope but operates at significantly greater scale with broader geographic reach and parent-group balance sheet support.

Emerging players

• Airedale Group: Airedale Group provides building services including heating, plumbing, and electrical works to social housing and public-sector clients in northern England. It overlaps with TSG in service offering and customer base but operates in a different geographic region, making it a partial/emerging peer.

Direct peers

• Mears Group: Mears Group is the UK's largest provider of repairs, maintenance, and housing services to social housing landlords. Like TSG, it delivers gas servicing, responsive repairs, and planned works via framework agreements with housing associations and local authorities, making it a directly comparable operating model at greater scale.
• Liberty Group: Liberty Group is a national gas, heating, and renewable energy contractor focused on social housing. It shares TSG's core offering of domestic gas servicing, boiler installations, and renewable retrofits for housing associations, and operates on the same UK social-housing procurement frameworks (e.g., CHIC, Fusion21).
• PH Jones (Baxi): PH Jones is a national heating, plumbing, and renewable energy contractor serving social housing providers across the UK. It is directly comparable to TSG's Servicing & Maintenance and Mechanical & Renewable divisions, including 24/7 contact-centre operations and gas-servicing contracts with housing associations.
• Bell Group: Bell Group is a UK building services contractor providing planned maintenance, refurbishment, and repairs to social housing. Like TSG, it operates through directly employed multi-trade workforces and framework agreements with housing associations, with comparable revenue mix and customer profile.

Regional players

• Saltire Facilities Management: Saltire Facilities Management provides building maintenance, gas servicing, and electrical works to social housing providers primarily in Scotland. It is comparable to TSG's service offering but serves a different geography, making it a regional rather than direct competitor.

Market position

Strengths5 records

Weaknesses5 records

Competitive moat6 records

Key risks6 records

Key highlights7 records

Customer concentration

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• Xx.com/TSGBuilding1961

Compliance22 records

Revenue estimate

Valuation estimate

Number of profiles

Profiles5 records

Subsidiaries3 records

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 TSG Building Services