A bay window gives more space in the house, lets in lots of light and it looks beautiful. So there are plenty of advantages of bay windows. Ideal if you are just short of space in your home. Before having a bay window built, you want to have a good overview of the costs and possibilities involved in this project. Renoca has listed the guide prices and possibilities for you, so that you know what to expect.
What does it cost to build a bay window?
The cost of adding a bay window to your house varies from £ 4,300 to £ 10,000, depending on the size and material chosen. Most houses from the 1930s already have a beautiful bay window as standard, nowadays it is a trend to have a bay window built yourself. In the cost overview below, see the average prices for having a bay window built per size.
| Width of bay window (metres) |
Depth of bay window (metres) |
Total average costs (including labour and VAT) |
|---|---|---|
| 3 | 1 | £4.300 |
| 3 | 1.5 | £6,300 |
| 4 | 1 | £5,600 |
| 4 | 1.5 | £ 8,400 |
| 5 | 1 | £ 7,000 |
| 5 | 1.5 | £ 10.500 |
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Price examples
See 3 price examples, to get a better idea of the prices for building a bay window.
Standard bay window
The average size of a bay window is 3 x 1 metre. This size is therefore most commonly used for bay windows in Dutch houses. The average cost of this bay window is around £4,300, including labour and VAT.
Large bay window
Do you need a bay window that is larger than average? For a large bay window measuring 6 x 1.5 metres, the average cost is £12,600, again this amount includes labour and VAT. This does not include any additional foundations that need to be laid for this bay.
Extra foundations
Building a bay window also involves laying foundations. In some soil types, it is necessary to place additional foundations to prevent subsidence. The average extra cost for placing additional foundations is around £800.
How does the price breakdown of a bay window extension look like?
What determines the cost of a bay window extension?
The total cost of a bay window extension depends on a number of factors, as mentioned earlier. Read here which choices affect the cost of bay window building.
Choice 1: Bay window size
The size of your bay window is, of course, the biggest cost determinant of this project.
| Width | Depth |
|---|---|
| + 1 metre: + £1.000 | + 1 metre: £ 500 |
Choice 2: Front or back
Erchers can be built on either the front or the back of a house. However, when a bay window is built on the front of a house, a permit must be applied for with the local council. To apply for a permit, a fee is charged by the municipality even if the permit is not eventually granted. This amount varies from one municipality to another.
Choice 3: Additional options
When building a bay window, too, you can choose from all sorts of additional options to make your bay window exactly the way you want it. See onion which options you can choose to give your bay window extras. £ 550 Roof£ 500 Stained glass£ 300 per m2
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