I have two questions :

I am planning on buidling a large home extension this summer that will fall into Permitted Development Rights. It is for a detached house and the extension will be approx 8m x 5m x 3.5m. I have created the design and drew up the plans myself and these are ready to be sent off to the council for inspection. However, On the Permitted Development form it is asking me for my agents name and address.

So my first question – As I have designed the extension myself can I add myself as the agent name and address?

My second question. As I do not want to pay architect fees to design the extension as I have done this myself I am hoping that someone knows of a profession who would take my drawings and make sure they;

– Adhere to all building regulation
– Have engineering calculations added (if needed)
– Have enough detail on them for a builders to price up the build
– Have enough detail in them for tradesmen to reference during to build

Thank in advance


  • Paul Claxton

    Hi Dean,

    To answer question 1, assuming this extension is for your own house, you do not need to fill in the agent part as you are the applicant. If the extension is on someone else’s house you can act as the agent and the house owner is the applicant.

    An architectural technician/technologist can do part 2 for you. Some may not like working from your drawings though (depending on your competence) and would need to redraw them on their own CAD software. To be honest its more economical and easier to get an architectural technologist/technician in from the start to do the planning drawing and then adding the building regulation details on to their own drawings when needed.

    Hope this helps,


  • Peter Eade

    I’m sure any architectural designer can produce the plans you require, I’m often being asked to do this. As you say even with PD you will require Building Regulation drawings. Your builders can only price off of the BR plans once you have approval. In no circumstances get in quotes from builders until you have the approved plans. You will also need the BR drawing to ‘take off’ your material requirements. Regarding the Agents part of the BR application form, ignore this if you are not using an agent although the guy who draws your BR plans should be happy to act as your agent.

  • Dean Mckeown

    great answers. Thank you. The extension is part of my own home so I will leave this blank as advised. As for the drawings themselves I think it seems a sensible route to employ an architectural technician.

    Does anyone have a rough estimate of what each one of these would cost (Architectural drawings and Building Regulation Drawings). I understand that is a very open ended question as prices vary depending on complexity and size etc. The extension is 40m2 brick, rectangle, solid floor with a 22 degrees pitch roof ( pretty basic I would have thought).

    In the meantime, I presume I could send my basic plans off to the council to have them agree the development is viable for Permitted Development even before having professional drawing drawn up as all they really need to know is the size, position and basic materials?


  • Peter Eade

    What ever you do, check with the planners first, you may need a pre-application meeting with them which these days is not free. I would suggest you ring them first, the planning customer services people will explain the way forward.

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