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A well designed house extension will not only provide you with extra living space, without the need to move home, it will also add value to your property. Extensions can either be single or two/multi storey depending on whether you desire a larger kitchen/lounge downstairs or an additional bedroom/bathroom upstairs.

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New Builds

Designing your own home gives you total flexibility to choose the size, shape and layout of the house you desire; it also enables you to tailor each room to your specific needs from the floorplan to the fixtures and fittings. New homes also come with a ten year warranty giving you a guarantee on the quality of the building.

Retail & Commercial Conversions

Whether you have an office that has seen better days and would benefit from a full refurbishment or a retail unit that needs converting to make better use of the space available.

Churches, shops, showrooms, offices and community halls to name a few are all projects that we have experience in and we'd be happy to provide references of previous clients for you to speak to.


Refurbishments & Renovations

Renovating or refurbishing a property has always been a popular way of getting a new home or business premises without the cost and inconvenience of moving house or relocating.  Whether it’s a home, office or commercial premise, many older properties are in need of complete or partial renovation as they have a design that is unsuitable for modern day living and work life.


Garage & Barn

An unused garage is an opportunity to create additional living space providing a larger lounge, dining room, children’s playroom, office or home gym. Properties with an integral garage are ideal for conversion as they are already part of the house and in most cases will fall under permitted development as you are not altering the actual structure of the building. 


Loft Conversions

A carefully planned loft conversion can be an ideal way of giving you an extra bedroom, a new office or other addition to your home, at a cost which is well below that of a full-blown extension. Many properties have an underutilised loft which is suitable for conversion. A popular alternative for getting extra space without moving house.



Cubic One Construction Ltd is a building and refurbishment contractor with offices in Hertfordshire and North London, providing professional building services within London and the Home Counties, operating across all sectors of the building industry.

With over 31 years of experience under our belts within the construction industry originating from previous trades-based companies which focused on small to medium residential building works progressing over time to incorporate more complex and diverse building projects.

Since the formation of the new company, our reputation has gone from strength to strength with over 95% of our projects originating from either referrals or repeat business.  We pride ourselves not only on the quality of our work, but also on the high level of client service, professionalism, expertise and aftercare that we deliver.


Combining the skills of our hands-on directors and the talents of our tradespeople, we provide a personal approach to every project we complete enabling us to develop long term relationships with our clients.


Years of Experience





Successful Projects





Mark & Becky
Old Harlow, Essex

"We had a bespoke garden room constructed which included a cinema room and games area as well as a guest bedroom and en-suite for our friends and family to stay in when visiting us. We absolutely love the finish which has been completed to a very high standard and the lighting at night just adds that extra special touch. It is also a great playroom in the summer for our children. Matt and the team were always very polite, respectful and tidy and we wouldn't hesitate to recommend them".

Mike & Ruth
Bishops Stortford

"Great to work with Cubic One. Thanks very much for everything, we appreciate it has not been an easy extension with a few curve balls along the way but all handled very professionally by Matt and the team."

Emma & Matt

"We are thrilled with the work and would recommend most highly; the standard of work has been excellent with real attention to detail. We are particularly impressed with the speed and efficiency of the work which has been completed to a very high finish and on deadline despite unforeseen additional work which had to be undertaken along the way. Both Matt and Dave have been a pleasure to have around and have been professional, reliable and trustworthy".




For any enquiries, questions or commendations, please call: 01279 790071 or fill out the form below.

Head Office

Suite 2,

Old Farmhouse,

Stansted Courtyard,

Parsonage Road,


CM22 6PU

Contact Us

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London Office

5-11 Green Lanes


N13 4TN

Call us: 01279 790071

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