Fix the bird box 1.5 – 5 metres high up a tree – or mount on a pole or fence.    If you don’t have trees in your garden then fitting it to the side of a shed or a wall is also acceptable.   A method of fixing which allows easy removal for cleaning and relocation is important. 

Ensure the site you provide is as suitable and safe as possible.  It must be secure from predators and weatherproof.   Spikes that encircle a branch or tree trunk are an option to deter cats, as are boxes mounted on metal poles.  Prickly or thorny bushes make good sites although inspection of the box could then prove awkward.  Tilt the box forward slightly so that rain runs off naturally.  A couple of drill holes in the base of the box will also help with drainage.

If fixing boxes to trees, galvanised wire can be used to tie the box to the trunk or make use of a horizontal or vertical baton.   It is possible in some situations to wedge boxes firmly in tree forks without nailing or tying.  Steer away from nailing your birdhouse directly into a living tree. 

Fixings should be checked regularly to ensure the box remains firmly in position – and to prevent damage to growing trees from any wire used in the mounting.

Traditionally bird boxes are put up in winter because it gives the birds time to get used to and inspect the nests before nesting.  However it is never too early or too late to put up a box as some birds use them as night-time roosts.  Birds spend time looking at all the possible options before deciding on a site.