About Us

We Create Space

Wouldn’t it be nice to integrate your home and garden with a Garden Room extension?

You can create extra space by adding on to the back of your family home. You may live in a townhouse where extending the property with an ingeniously designed Garden Room extension is the most practical way of achieving valuable additional space.

Never too hot or too cold, a Garden Room extension can be used all year round. The unique design means that you can combine rooms seamlessly or have entire glazed walls to make the most of your beautiful space.

Oliver James is one of the country’s leading specialists in garden room design and build. Our expertise is in managing your entire project, from start to finish. We organise your planning permission, we draw up your architectural plans and obtain building regulation certificates. All you have to do is choose your fixtures and fittings, we do the rest, giving you peace of mind.

Design, Manage, Build

Having the builders in can be a very stressful time. But we aim to eliminate this by our procedures and thoughtful manner during the Oliver James project process.

We have three goals:

  • Firstly to offer an exceptional service,
  • Secondly to build your project safely, on time and to budget and
  • Thirdly to have created a better space for you or your family

With over 25 years combined experience within our organisation we believe in traditional values whilst using the very latest technology available.

The Oliver James Project Process The Oliver James Project Process


We will Design, working with you to create the space you are looking for. We can produce detailed plans of proposed Garden Room and submit them to planning if required.


We will Manage your project from design to completion. Liaising with our, Engineers, Building Control and Planning, all the way through to completion.


Build the Garden Room that far exceeds your expectation.

Why I started Oliver James

It was a winter’s day and I was working at home. I thought I’d sit in our conservatory make my calls and do the paperwork. I opened the doors, walked across the cold floor and turned on the portable heaters to heat the room. I went back a while later and it was still cold. At this point I turned on another heater and turned up the radiator on the back wall. This had become the norm and up until that moment I’d not given it much thought. I eventually sat down and thought this room just isn’t working; Why should I have to have 2 electric heaters to compensate for a radiator? Why should we have a set of doors between our home and the conservatory? Why do we buy these structures? I began asking friends whether they had the same situation and the answer was yes regardless of the price of the conservatory.

With my knowledge of design, products and build I started to sketch out some ideas that could make a difference. We could have warm roofs, warm floors, skylights that let in as much light as required, doors that opened the whole width of the room to the garden. No separating doors/thermal break to the garden room just take the wall out from the home to the new room. All this could be achieved and in the opposite direction to keeping the room warm, with our build and design process we would also keep the rooms cool in the summer which is as much a problem with the magnifying glass effect of the conservatory.

This was the idea and how and why we started Oliver James Garden Rooms back in 2004, and so much more has evolved. I was right in my thinking I was not alone. Our rooms give the benefits of sitting in our gardens completely integrating the home with the garden. They are used all year around without having to give it a second thought. That’s my story, James.

Why a Garden Room will add Value to your Home

A Garden Room extension from Oliver James becomes part of the official structure of your home, and adds value by way of the increased square footage.

A Garden Room extension must comply with a great many building regulations. We provide calculations for all aspects of structural and heating/cooling performance, which must be verified by an accredited engineer before being placed on record with your local authority.

As the newest addition, your Garden Room extension will almost certainly be more efficiently insulated – in the floors, walls, roof and glass areas – than the rest of your house.

And Why a Conservatory Won’t

A conservatory is not included in the square footage of your home by building surveyors who represent mortgage companies.

In contrast, a conservatory is relatively uncontrolled and unchecked. It does have regulations, but most of them are negative! From October 2010, a conservatory is not allowed to connect to any heating system, or to be controlled by a thermostat.

With no temperature control, you could maybe expect to enjoy your conservatory for 100 to 150 days a year. But then again, why rely on our unreliable climate?

Despite all these differences in fitness-for-purpose and quality control, the VAT levy on conservatories – 20% from 2011 – is the same as for a Garden Room extension!

About Oliver James

  • How many Garden Rooms have you built

    To date in excess of 150 and still counting at the rate of 15-20 projects a year.

  • Do you have a showroom?

    No, we don’t have showroom, however we are more than happy to arrange for interested clients to visit similar past projects.

  • Do you employ your own staff?

    We employ our own longstanding team, who in turn work alongside trusted specialist contractors.

  • What areas of the country do you cover?

    We currently serve Bedfordshire, Buckinghamshire, Hertfordshire, Northamptonshire, and Oxfordshire..

  • Are your projects ‘fixed price’?

    Yes, unless of course there are significant changes to the design or specification following the tender submission. Remember also that our tender price includes all professional fees and VAT, so the price we quote really is the price you pay.

  • How do your payments work?

    We typically break down the total cost into 10 varying stages payments beginning with an initial payment usually 1 week prior to a project starting.

  • Would you be able to do any additional work such as removing existing internal walls?

    In most cases we can fulfil clients’ requests for additional work – make sure to raise these when we visit so that the work can be taken into account when presenting our tender.

  • Do you fit TV/Sky/audio systems?

    Whilst we aren’t audio visual engineers, we would be happy liaise with your own installer to ensure the necessary cabling is incorporated into your Garden Room.

  • Will my Garden Room be ready to use straightaway?

    Your Garden Room will be finished and decorated for you, leaving you just to choose and lay your choice of flooring material.

  • Do you lay finished flooring?

    We don’t lay flooring, however we can recommend several local companies we’ve worked with successfully in the past.

  • Do you fit kitchens?

    We don’t however we can recommend several local companies we’ve worked with successfully in the past.

  • What is the best way to contact you?

    By email or phone. Please bear in mind we might be out on site so you may need to leave us a message but we will always get back to you as soon as possible.

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