Calculating the Gross Development Cost (GDC)

House Build Costs

Here are some average figures for building your houses or apartments:

Road and Drainage Build Costs

If you need to build a road into your site allow £205 per m2 for road and drainage.


If your site has an existing building that needs demolishing, here are some basic costs:

Professional Fees

Once you have your construction price allow 9% as additional fees to pay your professionals.
An approx. breakdown would be as follows: