This Light Blue Wooden Cottage Bird House with Removeable Back would be a great addition to your home. It has a removable back wall with a side entry hole to a single.

Light Blue Wooden Cottage Bird House with Removeable Back
Birdhouse
Removable back wall with a side entry hole to a single
Convenient paddle board attached to the back allows to hang
Unpainted nest box plus ventilation and drainage holes
Constructed of kiln dried hardwood
Animal Type: Wren; Nuthatch
Chickadee Material Details: Kiln-dried hardwood and exterior grade plyboard
Product Warranty: Limited one year
Bird House Design: Free standing
Bird House Style: Victorian
Material: Manufactured wood
Number of Compartments: 1
Removable Section: Removable back wall for easy maintenance.
Roof Material: Wood
Non Toxic: Yes
Outdoor Paint: Yes
Built In Drainage: Yes
Floor Levels: One floor
Mounting Peg: Yes
Animal Capacity: 1 mother & nest

Dimensions:

Overall Height - Top to Bottom: 10.25 Inches
Overall Width - Side to Side: 7.25 Inches
Overall Depth - Front to Back: 10.75 Inches
Hole Size: 1.25 Inches
Weight: 2lbs.