There are several websites that offer free plans and guides for building chicken nesting boxes, including Remove and Replace, The Poultry Guide and Urban Farm Online. These sites offer different plans with a variety of advantages.
Remove and Replace offers only one design, but it shows users how to construct a chicken nesting box in a series of clearly illustrated steps. The site also provides a clear list of required materials and tools. This plan includes several spaces for multiple hens as well as a roosting bar for improved comfort.
The Poultry Guide offers eight different nesting box plans, so users can choose the nesting boxes that are right for their birds and the space they have available. Some of the plans use scrap or upcycled materials to reduce costs and improve environmental credentials. These plans for chicken nesting boxes come in a wide range of sizes, so users are likely to find at least one that is appropriate in each case.
Urban Farm Online offers a simple plan with a slide show to help users see exactly how to construct the nesting box. It also provides useful advice on situating the box for the hens' use after it has been made.