LandLandHomecheck 
A run down on the local environment by postcode covering most government and official body information.
Land Regeneration Network in Wales
LRN provides a platform for contaminated land stakeholders in Wales. LRN provides a forum for discussion where regional, national and international issues on land regeneration can be raised, and
where Clients, Regulators, Research and Service providers can discuss their views with other parties. The site includes a wealth of information and links.
Envirosearch
Complete environmental check on a postcode area by Landmark Information Group from all authoritative sources. Their main website at http://www.landmark-information.co.uk details their commercial searches.
Up my Street
This site allows you a good profile of an area via demographics, housing, social background, etc.
Historic maps
Free historical maps from 1846 - 1899 from county gazetter. Acts as an aid to old quarry workings, contaminated land, boundaries, etc.