Why we don’t publish a price per square metre
Four steps that turn a rough idea into a price you can plan around.
Why we don’t publish a price per square metre
A single rate hides the things that matter: access through a terraced house, the depth of the foundations, the size of the glazing and the quality of the kitchen. We would rather visit, measure and give you a figure that is built from your own project.
- Every line of the quote is explained
- Provisional sums are clearly labelled
- Options shown so you can trim the budget
How we get to your number
Four steps that turn a rough idea into a price you can plan around.
Tell us the idea
Use the form to describe the extension, even roughly. Photos of the back of the house help.
Site visit
We measure, check access and drainage, and talk through the options that most affect cost.
Itemised quote
You receive a written breakdown with each stage priced, plus any provisional sums explained.
Refine the scope
We help you adjust glazing, finishes or layout if the first figure is higher than you hoped.
Extension cost questions
Common questions from homeowners trying to set a realistic budget.
- Can you give me a price per square metre?
- We prefer not to, because a single rate tends to mislead. Two extensions of the same size can differ widely in cost depending on foundations, glazing, roof and finishes. A site visit gives a far more reliable figure.
- What usually costs more than people expect?
- Foundations on difficult ground, steelwork for wide openings, large glazed doors and the new kitchen are the items that most often surprise people. Moving drains can also add cost.
- Are design and approval fees included?
- Our quote separates the build from fees such as drawings, structural calculations, Building Control and party wall costs, so you can see each one clearly.
- Do I need planning permission?
- Some single-storey rear extensions fall under permitted development, others need full planning permission, and conservation areas have stricter rules. Your council or the government’s Planning Portal can confirm what applies to your house.
- What is a provisional sum?
- It is an allowance for something that cannot be priced exactly yet, such as foundations before the ground is dug. We label these clearly and explain how the final figure is worked out.
- How can I reduce the cost?
- Simplifying the roof, choosing standard-size glazing, keeping drainage where it is and phasing finishes are common ways to bring a budget down. We can show the effect of each option.
- How long is a quote valid?
- Material prices change, so each quote states how long it is valid for. If your start date moves, we can review it.
- Is the quote free?
- Yes. The site visit and written quote are free and there is no obligation to go ahead.
- Are you insured?
- Yes, ask for our insurance certificates when you receive your quote and we’ll send copies before a start date is agreed. Checking cover is sensible with any builder.
Swap guesswork for a real figure
Book a free visit and get a line-by-line price for your extension.