Planning Portal LogoBefore you start – Planning and Building Regulations
If you are not sure check with your local planning authority, to find out if your proposals fall within the scope of planning and/or building legislation. (Some smaller projects do not require consent).

Building & Planning Applications
The law requires that planning decisions are policy led, using the local development plan to determine the suitability of each proposal. It is therefore important, that your home addition respects the shape and appearance of your property, and will not be ‘intrusive’ to the surrounding area.

Building regulations applications will ensure that the building will satisfy the technical requirement, with health and safety matters also being high on the building inspectors list of priorities.

Workmanship – External Appearance
Your home addition should be designed to respect the appearance and shape of the existing structure. We recommend that you satisfy yourself the builder is aware of all conditions attached to the building and planning approvals, and will also be using appropriate materials, i.e. roof tiles, facing bricks, stonework, etc.

Your Builder – Planning the works
Before work commences, you may wish to agree a “Programme of works” with the appointed contractor, so that you will be aware of, not only when the project starts and finishes, but also the sequence of events and how they are likely to affect you at any given time – FOREWARNED IS FOREARMED.

Your Building Inspector – Make use of Building Control Services
During the building operations, your local authority building control officer or approved inspector will make periodical inspections of the work and endeavour to give you a professional and effective service, with Health & Safety matters high on his/her list of priorities. A summary of typical services offered by them is as follows:
1. Plan approval and site inspections.
2. Advice on Building Regulations and associated matters.
3. Early response to request for site inspections.
4. Issue a completion certificate for work in compliance with the regulations.
5. Advice on the need for consultants.
For more information/advice on building control services, email

Or visit website

Permitted Development
Not all extensions and ancillary buildings need permission. However, if you do not require permission, it is still advisable to follow the guidelines in this note. If you are unsure whether your extension needs planning permission, you should submit an enquiry form to the Planning Department with outline details of your proposals. In some cases it may need a site visit. It is very difficult to give advice in response to a telephone call, because mistakes could be made without seeing the proposal clearly and properly checking planning records.

Do you need permission? Interactive guidance for householders


Typical Plan & Design Fees:
Single Storey Extension £450 – £650
Two Storey Extension £850 – £1100
Loft Conversion £800 – £1000 Inc. Structural Calculations
Structural Beam Calculations £45 per beam
Heritage statement (varies according to size of proposal)                                                                                                    Preliminary Bat Roost Assessment c£500

Council Fees:
Planning £328.00. Larger rear extension Prior approval £190.00 (incl. Planning Portal service charge)
Building Regulations Varies according to size of proposal
Purchase of Ordnance Survey Site Location Plan £25