Mainline Contractors & Co Ltd is a building company based in Eltham SE9, we have over 30 years of experience behind us and as so have a wealth of experience and expertise in almost all aspects of the building trade. We have carried out many projects in Eltham and the surrounding areas. We cover many areas including Greenwich, Bexley, Lewisham, Sevenoaks, Tonbridge and have even travelled to Deal on the south coast to work.
We are known for our quality of work, honesty, friendliness and competitive prices.
We are happy to carry out the smallest to the largest of jobs and all will be completed with the same level of care and attention to detail that we deliver on every one of our projects.
Whether you are thinking about or ready to start your dream project we can offer you advice and expertise.
Don't just take our word for it click hear to read our testimonials.

Mainline Contractors & Co Ltd is a family run building company originally started by my father over 30 years ago, I worked alongside my Dad and his team from leaving school, as well as teaching me about building he also taught me the importance of being honest and straight forward in business, and his example has been an inspiration to me for all my working life. Mainline Contractors & Co Ltd is now owned and run solely by myself, Joseph King.

We have a fantastic team of competent  tradesmen, some of whom have worked for us for 10 years including bricklayers, carpenters, plasterers, hard landscapers, roofers, electricians and plumbers.

We have great experience and have carried out all types of work from driveways, patios, extensions, loft conversions, new builds to a full renovation of a 16th century manor house. We have also carried out shop refurbishments and do regular work for universities.

Like any business, we rely on word of mouth recommendations and repeat business from satisfied customers. This means that ensuring that the customer is satisfied is my number one priority, and of course all our work is guaranteed by my company.

If you are new to us then take the time to read our testimonials and I am always happy to put you in touch with someone  for whom we have completed a similar job to the one you are interested in.

Mainline contractors & Co Ltd are proud to be members of the following organisations.

Please click on the organisation to find out more.


  • Extensions
  • Loft Conversions
  • Renovations & Alterations
  • Drives, Patios
  • Garden walls & Landscaping
  • Structural Work
  • New Build
  • Property Maintenance
  • No Job Too small

Builders South east london and kent covering sevenoaks tunbridge maidstone eltham bexley greenwich bromley lewisham sidcup dartdford welling bexleyheath lee blackheath 

​​​​​A Family run local building company with 30 years experience.

About us

Mainline Contractors & Co  Ltd