The Technical Research Unit of Help-for-Bluebirds.org developed plans for a front opening eastern bluebird nest box. The plans are free and available at:
(click ->) Plans – front opening eastern bluebird nest box (wood)
Front opening eastern bluebird nest box (with louvered cross ventilation ports)
Please address any question regarding the plans to:
Bluebird-Shepherd@help-for-bluebirds.org