It is a Grade II* listed building[1] and stands on the north side of Church Street.
There is no reference to a church or priest in the entry for Long Buckby in the Domesday Book.
[2] The main structure of the present building is medieval, with restoration in 1862 by George Gilbert Scott and in 1883–87 by William Bassett-Smith.
A detailed description appears on the Historic England website.
[3] Long Buckby is part of a united Benefice along with Watford, West Haddon and Winwick.