We work in a really diverse range of sectors, from airports to pharmaceuticals

Our Clients

Our clients come from a diverse range of sectors including airports, banking, education, leisure, professional services, pharmaceuticals, retail and technology but they all have one thing in common: they demand quality and value from their service providers.

We are proud to be rated by our clients as a reliable, collaborative, fair and proactive organisation that consistently delivers a high quality service. Our clients also say they enjoy working with our teams.

70% of our turnover is from repeat business year-on-year, and we retain our clients through constant innovation and effective responses to change in the dynamic markets in which we work.

See our Projects

Our History

From small beginnings as an electrical contractor, started by two brothers in the post-war years, Gratte Brothers has now become one of the leading Building Services Contractors in the UK, whilst proudly remaining a family-owned business.

  • 1940s


    Gratte Brothers First Registered

    Gratte Brothers Limited was first registered on 22nd May 1946 by Derrick and André Gratte as an electrical contracting business based in Knebworth, Hertfordshire. Shortly after, Derrick Gratte left Knebworth to establish a London branch of the company in Red Lion Square, Holborn.

  • 1950s


    Business Expands

    It did not take long for our London branch to outgrow the Knebworth operation by acquiring major blue chip clients in the retail and expanding aviation sectors.

  • 1960s


    The Second Generation

    Martin and Ian Gratte, Derrick’s sons, joined the London headquarters (by now located in Wicklow Street WC1), just as company turnover reached £1,000,000 for the first time. Our Knebworth office opened a dedicated commercial catering equipment division.

  • 1970s


    New Ideas

    Martin and Ian Gratte were appointed to the Board, bringing new ideas. We established a separate M&E design division and added a mechanical building services capability to our portfolio of services.

  • 1980s


    Largest M&E Contract to Date

    We won the largest M&E contract to date (£250,000, to provide building services to the Chinese Embassy in London). Our turnover reached £13m and Ian Bass, Derrick’s son-in-law, was appointed Financial Director.

  • 1990s


    Relocating to Regents Wharf

    Having outgrown Wicklow Street, we relocated to Regents Wharf, N1 and completed our first data centre project. We also registered a separate commercial catering equipment company and an electronic security management company as subsidiaries of the Gratte Brothers Group.

  • 2000s


    Over 100 New Staff Join

    We acquired a mechanical services company, adding over 100 new staff to our business. Derrick’s eldest grandson Stephen was joined at the company by David, another grandson.

  • 2010s


    The Third Generation

    In 2016, we celebrated our 70th Anniversary. Stephen and David were joined by Chris Bass, a third Grandson of Derrick, and all three were appointed to the Group Board.

Quick Facts

Parent Company:

Gratte Brothers Group Limited
Company Registered Number 2732546

Registered Address:

2 Regents Wharf,
All Saints Street,
N1 9RL

Operating Companies:

Gratte Brothers Limited
Registered Number 411138
Mechanical and electrical building engineering services.

Gratte Brothers Specialist Services Limited
Registered Number 2729551
Mechanical and electrical maintenance services.

Gratte Brothers Catering Equipment Limited
Registered Number 1832773
Design, supply, installation and maintenance of
commercial catering equipment.

Gratte Brothers Security Management Limited
Registered Number 350139
Design, installation and maintenance of security systems.

Gratte Brothers Technical Services Limited
Registered Number 666254
Mechanical and electrical building engineering services.

Trade Associations, Assessment & Industry Organisations:

APPSS – Association of Police and Public Security Suppliers
APHC – Association of Plumbing and Heating Contractors
BSRIA – Building Services Research and Information Association
BESA – Building Engineering Services Association
CEDA – Catering Equipment Distributors Association
JIB – Joint Industry Board
NSI – National Security Inspectorate
NICEIC – National Inspection Council for Electrical Installation Contracting
Achilles – Building Confidence
Achilles – UDVB
Gas Safe


Gratte Brothers is assessed to:

Quality Standard ISO 9001

Environmental Standard ISO 14001

Safety Management Standard OHSAS 18001

Find us:

2 Regents Wharf,
All Saints Street
N1 9RL

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Contact us:

Email us: info@gratte.com

Call us: 020 7837 6433