GMG are award-winning main contractors who are trusted, established and progressive partners for their clients.

We provide successful project delivery in terms of quality, dynamism and efficiency, and we ensure that all programmes of work are delivered with integrity and safety at the forefront for everyone involved.

Our health and safety standards have been accredited to the highest level so we can assure our clients, staff and partners with confidence that GMG are the best contractors of choice


  • Pitched roofing
  • Slating
  • Decra roofing
  • Glazing and rooflights
  • Flat roofing
  • Leadwork
  • Joiner works
  • Profile roofing


  • Kwikstage scaffolding
  • Tube and fitting scaffolding
  • Mobile, elevating works platforms

External render

  • External wall insulation systems
  • Wet dash sender
  • Dry dash polymer render

Floor screeding

  • Granolithic and anhydrite
  • Underfloor heating

Internal trades

  • Joinery finishings
  • Electrical works
  • Central heating
  • Windows and doors
  • Plumbing
  • Decoration

Engineering works

  • Land cut and fill
  • Surveying services
  • Road and dense bitumen macadam installation
  • Value engineering
  • Drainage installation

Hard and soft landscaping

  • Fencing
  • Turfing
  • Stone walling
  • Driveways
  • Decking ramp