The Almost Impartial Guide  
   A guide to making an informed choice on conservatories, sunrooms and gardenrooms, with a list of suppliers in the UK and Ireland.
   http://www.almostimpartialguide.co.uk/conservatories.htm

A.J. Smith and Son (Benfleet) Ltd.  
   Hints and tips for decking and directory of UK deck-builders from importers of treated timber decking.
   http://www.ajsmith.clara.net/decking.htm

PearTree TreeHouse Company  
   Design and Build TreeHouse company, building about 200 unique TreeHouses for children and adults across the UK this year.
   http://www.peartreehouse.com

Timber Decking Association  
   Aims to advise homeowners, DIY enthusiasts and design specialists on planning and installing timber decking. Includes media resources, FAQs, list of members and general how-to information.
   http://www.tda.org.uk/

Patrick Fulton's Treehouse Construction Guide  
   A detailed guide to treehouse building, with pages of tips on construction, advice and hints from visitors, world treehouses, photographs, plans and links.
   http://www.btinternet.com/~fulton/treehous.htm

Deckingweb - The source of info about timber decking  
   Information about timber decking, including how to deck info, faq, UK deck suppliers and builders directory
   http://www.deckingweb.co.uk