House Sparrows, we have a plenty! They take a 1 1/2inch hole which is the same as the Bluebird and Tree Swallow. My husband has to be vigelant at pulling out the sparrow nests in our Bluebird and Tree Swallow houses early in the Spring. BUT if you want the sparrows, that’s great! They will nest in both rural areas and in villages. So if you just fall in love with one of my houses that has an 1 1/2″ hole and you live in a village you can still house a Sparrow in it. They will force themselves in to any house with at least 3″x 4″ floor space with the hole at any height. Their house can be from 5 Foot above the ground up. Most birds will not live together in one house but if a sparrow likes the area and there’s more than one hole it is possible for more than one family to house in a multi dwelling house.