How much does a house extension cost?

How much does a house extension cost?

Indicative levels for house extension costs in South East of England

If you are thinking about extending your house, it is vital to work out how much will your extension cost before you start the work. Therefore this article will discuss benefits of building your house extension and then provide an indicative costs for works in South East of England.
Adding value to your property

In the current UK economic climate more people are opting to build an extension rather than move, as it can be a cost effective way of adding value to your property. Depending on the size of the extension you are planning to build, it can add around 25% to the value of the property and basement or loft conversion will typically boost the property value by 10% to 15%.
How to calculate house extension cost

Providing cost estimation for an ‘average’ house extension can be tricky – since there really is no average! Issues such as ground conditions, access to the site, location and proximity of services are a huge factor in the build budget. Our indicative costs are provided assuming that all of these issues are reasonable to deal with.
Type of Work Average Costs*
Planning £1, 000 – £3, 500
Structure (including windows, eternal doors, roof works) £600 per square metre
Fixture and fittings (from electrical and plumbing
to plastering and floor works) £400 per square metre
Decoration finishing £10 – £15 per square metre

*Indicative levels for work in South East of England

The above figures will be more variable and depend on the preferences of the homeowner. For example prices of the fitted kitchens can vary enormously depending on the manufacturer. A more detailed cost estimation for your extension may be obtained at the planning stage of your project. At this time, the outline design is complete and floor plans are ready to be submitted with a planning application to the local authority. A builder will then be able to give an indicative estimate for the work.
Contingency fund

Of course, you can’t foresee unexpected problems but you can prepare for them. You should always set aside a contingency fund – we suggest 10% – to deal with added costs that can, and often do, arise.

Extending your home is a cost effective way to increase the value of your property and with a good design it will be a source of pride and satisfaction for years to come.