Outdoor Structures

Butterfly house
A set of free plans and directions for building a butterfly house.
http://geocities.com/butterfly_dd_0502/

Cold Frame, Hot Bed Construction And Use
Discusses the construction and use of hot beds and cold frames used by gardeners for propagating vegetables, flowers and ornamentals.
http://ohioline.osu.edu/hyg-fact/1000/1013.html

The Directory
Information on a range of outdoor garden structures.
http://www.gardenbuildings.com/

Learn About Garden Sheds, Greenhouses and Arbors
Information on building garden structures such garden sheds, greenhouses, arbors, and trellises from do-it-yourself kits or plans.
http://www.gardensheds.greenhouses.arbors.learnabout.info/

Sheds and Barns
The site for shed and barn links, including plans, kits, books, and articles.
http://www.geekbooks.com/walden/d-i-y-sheds-n-barns.html