An extension to your house can be a easier option to moving for gaining more living space, but how much will it cost for types of extension of different sizes?
The table below gives examples of the range of prices we have had submitted. As a rough idea you can typically say that it will cost £1000 per m2 or 93 per ft2 including basic plumbing and electrician work. This price is per unit area of internal floor space and so a 5x4m single floor extension will have a total floor area of 20m2 and a double storey will have 40m2.
Here are some prices from Whatprice users and personal research. The amount of information submitted varies and what you see is what we get! If you have any of your own feedback then please fill out the form at the bottom of the table and help this project.
| Category | Average Cost | Price Range | Units | Last Updated |
|---|---|---|---|---|
| Double storey | £44645 | £10000-90000 | per item/job | 2008-05-04 |
| Double storey | £1355 | £1210-1500 | per m2 | 2007-11-04 |
| Planning costs | £1861 | £1000-3500 | per item/job | 2008-02-25 |
| Single storey | £21940 | £5300-42000 | per item/job | 2008-04-29 |
| Single storey | £770 | £500-1206 | per m2 | 2007-11-02 |
Typically, a single storey extension will cost more per metre squared than a double storey. In theory a triple storey would cost less still. In practise the difference in cost may be small though. The price per square metre also depends on the size of the property. There are basic costs that don't increase too much with size and hence the cost per square metre will decrease as the floor area increases.
The price for a home extension depends on several factors
As an example the final cost of the project could comprise of
The fixtures and fittings aren't just electrical and plumbing work but all the plastering and floor work. The shell build includes the windows and external doors plus roof.
A general process for getting an extension built might be
This is just a simplified overview, you will also need to get building regulations approval and permission (at least no dispute) from your neighbours as well.
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Date Added: Thursday 21st February 2008
"can't definitely say for those submitted by users but its extremely unlikely someone would quote the price they paid before VAT. In general all prices on the site include VAT (where required) as they are what consumers have been billed"
Admin
Date Added: Saturday 2nd February 2008
"Do the guide prices per sq ft include VAT?"
Steve Smith