Professional fees

IN Guides
Professional fees 

At the time of publishing this guide June 2017 these are the professional fees required for a standard loft conversion and a one or two storey extension. These fees apply to Architect and Structural Engineer Designs, Building Regulations, Household Planning Application, Building Control, Certificate of Lawful Development, Building Control and Party Wall Arrangement. 

Architects Fees (£30-£40k)                      

£1,200 - £2,400

Building Regulations fees (under 40m2)  


Building Regulations fees (40-60m2)      


Engineer's Structural Design Fees              

£600 - £1,800

Household Planning Application                


If you can’t carry out your conversion or extension under Permitted Development Rights

Certificate of Lawful Development            


If you are using your Permitted Development Rights

Building Control Fees                                

£960 - £1,200

Party Wall Arrangement Fees                    

£850 per neighbour