Lee and Sibley Building Contractors LLP

Who we are

Lee and Sibley was founded in 1993 by Steve Lee and Martin Sibley. We are a general building company involved in all aspects and sizes of construction. Over the years we have worked hard to maintain our ethos of excellent workmanship delivered on time and on budget. With our experience we are able offer advice on construction and design ideas, coupled with the most cost-effective method of achieving your dream project.

Our Services


Need more room?

Rather than suffering the stress of moving to a new house, building an extension can be an extremely cost effective alternative. However, we understand that deciding to have any building work can be a daunting experience too. Therefore, we aim to make the extension to your home progress as smoothly as possible.

Lee and Sibley have over 25 years of experience and are on hand to provide advice throughout your project. We furthermore, provide every client with an itemised quotation, giving clear accounts of costs at each step of the build. We will also guide you through Planning and building control issues if required.

New Build

Here at Lee and Sibley we are able to oversee your new build from the initial planning until the completion of your dream home and our tradesmen will provide you with the very best quality and workmanship.

We have a long-established reputation for providing projects, constructed to the highest standards, on budget and on time.


There comes a time in the life of every house when it needs a little TLC. This is where our vast experience in renovation comes in to play. Whether your house is a listed building or a modern dwelling, we provide the expertise to breathe new life into your much-loved home. From a new roof, structural alterations, new kitchen and bathrooms to decoration, we can even landscape your garden. We deliver the very best service and advice.

Grade II

Here at Lee and Sibley we have a wide range of experience in working with all aspects of Listed Buildings. Both Steve and Martin have completed Traditional Building Skills Courses through Essex County Council which include; Lime plaster repairs, renovations to timber frame and historic windows, repairs to Flint walling, conservation brickwork and working with lead. We appreciate that working on a Listed Building requires knowledge of specialist materials and suppliers and we have operated extensively on many Listed projects including Oak frame repairs, lime plasters and peg tile roofs. We are also available to liaise with local Conservation Officers.


As a company we have undertaken numerous commercial projects. These range from Alteration, refurbishment and extensions to numerous Schools and hospitals, to shop refurbishments and the complete Refurbishment of the Water Tower at RAF Marham in Norfolk Our latest projects include; QE2 Hospital in Welwyn Garden City, primary and secondary schools in Stevenage; Heathcoat, Barnwell and Giles, and Samuel Ryder Academy in St Albans.

Structural Alterations

Do you feel rooms in your house are too small? Would you like a larger living area, kitchen or bedroom? Conversely, do you have large rooms but feel more functional spaces are needed in your life?

Lee and Sibley have the knowledge and skill to transform your home into the space you desire, whether it be taking out a dividing wall to provide a larger airier space or sectioning and dividing existing rooms to create brand new areas within your home.

Projects requiring Structural alterations need to be approached with careful planning and expertise. With many years of experience, Lee and Sibley have the knowhow to approach and complete this, often tricky work, removing the stress from you. We are proficient in providing both structural drawings and calculations to satisfy your Local Building Authority and provide you with a fully detailed quote.




Our Portfolio

The Team

Steve Lee

Gaining knowledge of every aspect of building, Steve began at grass roots level, working for a Builders Merchant. He then worked for a small building company as a labourer and groundworker before completing a City and Guilds in Carpentry and Joinery, for which he was awarded a distinction. Following this vital training he went on to become a foreman for a local company before joining forces with Martin and forming Lee and Sibley Building Contractors, which have been operating successfully since 1993.

Martin Sibley

Martin is a qualified Quantity Surveyor and has worked in Construction since leaving school after ‘A ‘Levels. His experience ranges from small build extensions up to multimillion-pound projects, both in the UK and oversees, in new build construction both domestic and commercial, civil engineering, renovation and refurbishment. Martin is able to bring a vast store of experience to our building projects.