Rough Cost Of Ground Floor Extension

As a rule of thumb you can add 50 extra to the build cost of a single storey extension.

Rough cost of ground floor extension.

See the bottom of the page for how much my extension ended up costing. The cost of excavating beneath an existing property and supporting it whilst the structure is underpinning is expensive and the calculator uses a multiple of 3 x the average cost per square meter for an above ground extension. If it all depends how much does a single storey extension cost. In 2019 an estimate for the cost of a single storey extension is anywhere between 1 350 and 1 950 per m2.

Two storey side or rear extensions are more cost effective than single storey extensions coming in at around 1 320 to 1 620 per m for a standard build so with this budget you could extend by at least 35m sufficient space to add a large kitchen and or living room extension on the ground floor with two new bedrooms and a bathroom above. 1 900 to 2 200 per square metre for good quality. A rough building cost would be 45 000. And 2 200 to 2 400 per square metre for excellent quality when building a single storey extension.

Basement extensions cost on average between 3 500 5 000 per m. House extension cost calculator are you looking for more space or thinking of buying a house and extending it yourself. The average house extension cost in london in 2019 is between 1 600 2 100 per m. 1 500 per square metre for upper floors extensions per floor.

Speaking to our experts we have established that the basic price of building an extension is 1 100 to 1 400 per square metre. These prices are for for a good quality extension. Well before you go dreaming of sky lights and kitchen islands take a look at our house extension cost calculator below to determine how much you may expect to pay for the labour costs in england and wales. However in reality our build came up much less but partly because it is a simple square ish extra room.

Below we have broken down different elements of an extension build and the different kind of costs involved but the key underlying cost relates to the size of the extension being built. There are different ways to break down the cost of your extension but here are some rough costs. The average build cost figures used by the extension cost calculator assume straightforward ground conditions and a. The cost of a typical high spec glass extension is around 2 500 per m.

In london and the south east this could be anywhere between 1 800 and 2 300 per m2. 2 000 per square metre for ground floor extensions. So 30 000 50 45 000 for the basic build cost. Add on 10 15 for professional fees architect planning application building regs structural engineer 6 750 at 15 vat 9 000 double storey house extension cost 60 750.