St Peter's is substantially a 12thc. church of nave, chancel and W tower. Aisles were added to the nave in the 14thc. The W tower, with its twin bell openings, angle shafts and tower arch are all recorded here, as is the font. Construction is of flint and pebble with ashlar dressings and the tower has a lead spike. There was a restoration by Ewan Christian in 1883.

In 1086, Gerard held 6 hides in Duxford from Count Alan. Count Eustace held 5 hides and 3 virgates. Gilbert held 4½ hides from Robert de Tosny, and Payne held 3 hides and 1virgate from Hardwin de Scales. No church is mentioned in connection with any of these holdings, so it is not possible to distinguish between the two Duxford parishes at this date.

Pevsner compares the angle shafts of the tower to Burwell.