A simple bracket made from 1×3 stock. Mitres of 45 degrees on shown edges provide stability plus some pleasing looks. Shorts screws and a good wood glue will make this unit very strong. Be sure to pre-drill holes for screws to prevent splitting.

Bracket mounted on wood door trim. Extending the vertical piece above the horizontal makes the screws easier to install (see example above).

4×4 house on a bracket. A rubber-band strip from an inner tube holds it for now, but normally a single screw from under the bracket does the job.

4×4 house mounted on a bracket set 1–2″ forward. A single screw secures it, allowing the house to rotate toward the optimal morning-sun direction.

Left: 3/4″ Ply, 2″ x 2″ block on a vertical door trim. Right: Screw the house to the block from the inside before inserting nests. This allows the overhang on the roof to be clear of the door trim

A roof is mounted above the house. The house & nests get a maximum amount of sunlight if the house faces east. To the right, bamboo has been split to provide a gutter, thus water will not flow in front of the house.

Simple brackets hold bundles of bamboo or reed lengths inside a 4×6 ft. greenhouse. I started with one bundle but the nest was so successful a second was added. The door to the greenhouse was left open and a roof vent added a second “escape” route. The bees were not fazed by the greenhouse structure in the slightest.

This was a solution for pollination of fruit trees that bloomed very early in the spring before most insects were active. The warmer indoor temperatures encouraged emergence a few days earlier than normal.