Originally Posted by ChickaLong
Looking to build nest boxes soon.
I like the 12x12 dimension. Use external mounted box to coop with a 9x9 opening from coop. I just built a three nest box, 3 ft x 1 foot with sides sloping 14 inches to 12 so the plywood top hinged to coop sheds water. The interior is simply two dividers so there is three nests. Works great for large fowl and I've had large, large fowl; you'd be surprised what they easily and prefer to get into to lay. For number of nests I think two is a minimum unless you've only 2 or 3 birds. Chickens like a choice so in giving 2 they then can all use the one. Though it does come in handy if one goes broody there is an open nest and with numbers of 9 birds the line to the nest gets long in morning so a few can't wait it out and use the other nest. Over 10 birds is time for 3 nests, over 15 birds or so 4 nests and so on. Start with two and have a nest for every five birds.
Quick photo example of external mounted nests:
Bottom frame and two nailers for corners. sides sloped 14 to 12 inches. This gets screwed to coop.
2x2's on ends to screw the nest box to and middle ones to nail in a divider. Hole to coop was 10X30 making for 3 9x10 openings. Planned for 4 inches of bedding so bottom of hole was 6 inches up from coop floor.
Over sized top lid with two hinges mounted to coop.