House Extensions London,South London,Central London,West London,East London.
Almost every property has good potential for an extension,a well planned extension will add value to your property which will be much higher that the cost of building it. While any type of building work needs to be approved by the local council, 'Permitted development' will allow the house owner to carry out conversions and extensions following some simple guidance notes.

Single Story Extensions and Conservatories
On January 1, 1948, the Town & Country Planning Act came into effect. Anything built before that date is taken to be part of the existing house. Permitted Development Rights enable you to extend up to 15% of the existing house in volume, or 70m3, whichever is the greater. For terraced houses, this is reduced to 10% or 50m3. In both cases, the maximum enlargement is 115m3.
The extensions must be no higher than the existing house and if within 2m of a boundary, a pitched roof structure must not be higher than 4m or a flat roof 3m. It affects loft conversions as well. Loft dormers are allowed if the extension adds less than 50m3 to the volume of the house ( 40m3 in terraces); the roof extension must not face the highway, and the roof extension must not increase the height of the existing roof. Apart from these, for any other works you will have to apply for planning permission.
Two Storey Extensions
A two-storey extension can use the 15 per cent permitted increase in volume (10 per cent for terraced homes). The roof height should be no higher than the existing house and, if within 2m of the boundary, it should not exceed 4m. Provided the boundary is not too close, it's possible to build above a single storey garage or annexe to create new rooms without needing planning permission.
If you are looking to buy a property with planning permission we would recommend the buyer to investigate the area and to ask the solicitors to go through all the clauses in the deeds as we have worked in 2007 on a property worth over 800k bought with planning permission to convert into flats, the planning permission was granted by the local council, the Building Control Officer came to inspect the works,we had no problems till one day we have received a phone call from the local Conservation Estate who asked us to cease the works until the owners obtain planning approval from them as well, which months after was refused. The Council said its not their jurisdiction and there is nothing they could do, the estate agents and conveyancing solicitors were not aware of this situation and the property caused the developers to lose a few hundred thousand pounds

http://www.transilvania-developments.co.uk