Martinsburg Manor Purple Martin House MADE IN THE USA! Purple Martins are gregarious—they like to nest in groups. This 6 cavity Martin house is a great start for a colony. Purple martin houses should be erected at 12-18 ft. in height to attract this most prized of nesting birds. Item Dimensions: 18.5" H x 24" W x 14" D Hole: 2.125" This line has been in existence for 2 years, and is all made from reclaimed Barn wood and recycled materials (tin, and other woods). These are rustic pieces that are fully functional, and no two pieces are exactly alike!  The Made in America flag can be waved very prominently on all of these products. These birdhouses are made in Eastern PA, by the Amish, without the use of electricity (using pneumatic powered tools). These are shipped directly from our amish factory in Lancaster County, PA! This large, fully functional house has a detachable roof for easy cleaning. This house will allow Martin families to return year after year.