How much does a single storey extension cost in Hertfordshire?
A clear, jargon-free guide to what drives the cost of a single storey extension, and how to budget with confidence.
A single storey extension is one of the most popular ways to add space and value to a home in Hertfordshire, but the first question every homeowner asks is the same one. How much will it cost?
The honest answer is that it depends on size, specification and finish. Below we break down the main factors so you can budget with confidence rather than guesswork.
What drives the cost
Footprint is the biggest factor. A larger extension uses more materials, more labour and more groundworks. After that, glazing makes a real difference. Roof lanterns, bi-fold doors and large format glass cost more than standard windows, but they are often what transforms a space.
Finish level matters too. The kitchen, flooring, heating and joinery you choose can change the figure significantly. We always separate the structural build from the fit-out in our quotes so you can see exactly where your money goes.
Budgeting with confidence
Rather than a vague estimate, we give a clear itemised fixed quote once we understand your project. That means no hidden extras appearing halfway through the build.
If you are weighing up an extension, the best first step is a conversation. We will be honest about what your budget can realistically achieve before any drawings are commissioned.
