PDF File : owlbox_2012.pdf
The above link is to a PDF file that contains most of the information you will need to create your own owl box. I use cedar to build my boxes, but that is up to you. I also include cameras in my box, but of course that is also optional.
I will be happy to answer any questions you might have. I may also be able to connect you to someone if you need help building your box.
Help with installation is always a wise choice. Three trimmers are logical helpers when it comes to ladder work, and not damaging your tree.
If you are lucky enough to have owls in your yard, please respect their space. They will attack you if you come too close. Watch for dive bombing and beak snapping. Heed these warnings. Owls have been know to cause severe injuries to people that fail to heed the warnings.