Planning Permission
There are various aspects to your property that may require full Household Planning permission from your Local Planning Authority, along with what’s known as Permitted Development Rights. Most building Projects that are proposed come under either of the two mentioned above, and generally Bespoke to the individual property, but as a guideline I have listed below below most criteria for Domestic Developments.
Proposed Development:
• single storey can be added to a single story house / bungalow
• double story can be added to house
• the proposed development must remain a Domestic property, and not Commercial
Permitted Development Rights:
There are some projects which allow you to build under Permitted Development Rights allowing you to extend your property without a Full Household Planning Application. The PDR are as follows.
• for single storey rear extension, project must not exceed more than 3 metres beyond the rear wall for a single storey building, 4 metres from rear of existing house
• for a side extension the project cannot exceed four metres in height if a house
• can only be single storey (without applying for Full Planning Application)
• with extension only allowed maximum half the width of existing house, again should you exceed these requirements then Full Planning Applications required)
• all extensions more than one storey must not exceed 3 metres from rear of property or 7 metres from any boundary
• roof lines for project must match as best as possible existing roof structure, plus not exceed existing roof pitch height
• all window glazing to side elevations must be obscure and non opening (opening windows allowed if 1.7 metres above first floor height)

General:
Please note that maybe the previous owner has carried out an extension of some kind, this will effect projects hoping to be carried out under permitted development Rights, as there’s already been an extension built, so check or ring for advice.
Where the boundary lines concerned, in most cases walled gardens, fencing and hedges generally confirm your boundary lines, but also check with land Registry in order to clarify and avoid any possible neighbour disputes before applying for either permitted or household application
Note: Projects that are not on view from the front of the property depending on size, can be carried out on permitted Development Rights, requiring no Planning Application, if the development consists of work to the side or front of property, and visible from the front of road, Household Planning Permissions would be required. Regarding Balconies etc, please find for advice as there are so many variations as to what’s allowed and not.

Household Planning Permission:
Should any of the above not apply then you would have to assume Household Planning Application would be required
Disclaimer:
All the information given will not be a definitive guide to all the Local Authority Guidelines regarding what’s allowed within Permitted development, and what requires a Household Planning permission Application,
In most cases all Local Authorities work within the Government guidelines, with some Authorities taking a more relaxed approach to planning Consent, which will be part or our service to contact the appropriate Council Planning departments on there current guidelines for proposed building projects which apply to you.