How much will my extension cost
Projects can be designed and built to meet a specific financial budget. For instance, a domestic project from experience would cost in the region of £1,200 – £1,500 per m2. This reflects recent price increases over the last few years. If you’re developing an extension within London and some parts of the South East, these figures can increase to £1,500 – 2,000 per m2.
Other Costs to Consider
In addition to this, you will need to include approximately 10-15% for professional fees (architect, planning application, building regulations, structural engineer).
And let’s not forget to include 20% VAT that will need to be included on top of your total fees.
What About a double storey extension?
The general rule of thumb you can add 50% extra to the build cost of a single storey extension.
For instance
£30,000 for a single storey extension
Add 50% of the single storey fee for a double storey extension = £15,000
Double storey extension = £45,000
What About my Kitchen and Bathroom?
The above costs generally will not allow for your kitchen and bathroom costs or flooring and floor and walls finishes.
We would normally advise allowing between £3000 – £5,000 for a bathroom and £10,000 for a kitchen (again, completely depends on your specification, but this should get you a lower-midrange kitchen with appliances)
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How much will my extension cost? (c)Litebox Architecture
Updated: 13/10/2022