D Long construction is fully committed to the aim and objectives of constructing excellence. Working in partnership is second nature to us. More than 70% of our work is repeat business secured through long term relationships.

We provide a total one stop maintenance and construction service. Our professional health and safety team oversees all projects to ensure health and safety is top priority. We have an excellent team of construction specialists as well as a supply chain of quality sub contractors that a capable of undertaking challenging projects and producing high quality workmanship.

We are term contractors for London Borough of Barnet to improve and maintain schools and public buildings which remain in occupation during work.

Quality assured with value for money


  • education
  • commercial
  • local authority
  • industrial

our clients include:



We provide a complete maintenance service with 24 hour call out to the whole of London and Hertfordshire.


We offer a varied building and alteration service from design to build and undertake small and large projects.


We deliver a complete refurbishment using all the latest building methods.