Release the potential in your home

Email david@extendeddesign.co.uk

Tel 07702 682888

Extended Design LTD

97 The Farthings Astley Village Chorley


Standard Fees (Updated Jan 2019)

With a typical extension the work and fee is split into two parts:-

1) The planning drawings

2) The building regulations details.


Planning approval drawings  / full scheme drawings 550

Based upon a typical 1-2 storey house extension / attic conversion including paper copies, OS maps, all initial on site surveys and pre-start meetings. 

This includes a draft copy of your proposed extension to make sure we have interpreted what you want correctly before completing the final design stage.
Initial plans drawn up typically within 2 weeks

If the proposed works require a submittal for planning approval, a fee is then payable to the planning authority upon application, and this currently stands at 226 (Including the Planning Portal admin fee of 20)


Building regulations drawings/calculations 550 (following on from the planning / scheme drawings)

This includes all required structural design calculations carried out to the latest regulations (steel beams, standard foundation design, ground floor slab design, roof truss layout, floor joists, purlins etc)


Please note - changes in the scheme due to unforeseen circumstances, specialist foundations or revised layouts could be subject to additional fees


A fee is also payable to the local authority building control upon application, and this varies upon the size of the proposed works, but typically around 150-250

When the project starts. Building control will issue a separate invoice to cover the site inspections, and again this is subject to the size of the project - We would suggest allowing a further 250 for this element of work

If the proposed works require SAP calculations (Heat loss calculations) due to excessive glazing, this would incur an additional fee typically between 150-250 subject to the project requirements.  These calculations will be carried out by a specialist company on your behalf.



Extended Design Limited carry out all of the paper work.  All you are required to do is make the appropriate cheques payable to the relevant local authorities, we do the rest

Invoices are not issued until the appropriate work has been completed and is ready for submittal to the local authorities


If your proposed extension falls into Permitted rights to build and you only require a Building regulations package then the fee payable to the council of 206 is not required, however we would recommend obtaining a certificate of lawfulness from the planners confirming the works fall under permitted development rights and currently this cost is 50% of the planning fee (123 - Including the Planning Portal admin fee of 20)


Extended Design Limited does not currently charge VAT

(All prices subject to revision)



Extended Design Ltd Telephone:- 07702 682888    Email:- mail@extendeddesign.co.uk

Company Number 06801934 (England and Wales)

Trading Address:- Extended Design LTD 97 The Farthings Astley Village Chorley


(Registered office : Vantage House, East Terrace Business Park, Euxton Lane, Euxton, Lancashire PR7 6TB)