Looking for Cellar & Basement Conversion Companies in London W8?

Basement & Cellar Conversion
Project Location: London W8

> Property type: Flat, apartment 

> Floor area (in sq ft): 500 

> Number of rooms: 2 

> Job description: Yes (This is a ground and lower ground maisonette (from street level)with a good sized garden... which is level with and accessed from the rear lower ground room. We would like to dig down one floor in the garden...access down by the rear ground room. We would like to glass over the garden so it still can be used to an extent as a garden if possible ie strong enough to over but allowing light into the rooms below. We have planning permission) 

> Job start date: Less than two months 

> The client is looking for: To get quotes and a contractor to do the work