During 2019, Matt Hurford Historic Buildings and Archaeological Services was commissioned by Costock Parochial Church Council to carry out archaeological monitoring during the excavation of groundworks at the Church of St Giles, Costock, Nottinghamshire. The work is in response to proposals to insert a tea bar in the south-west corner of the nave and to bring a water supply from Church Lane to the west through the churchyard. The work was carried out in accordance with faculty requirements (2017-010598) and adhered to the recommendations made by Dr Chris Brooke, the DAC Archaeological Advisor. The objective of the archaeological work was to ensure that any archaeological information present was recorded appropriately and the results presented within a report. St Giles’ Church dates from around 1350. It is built from limestone rubble and consists of chancel, nave, north aisle, south porch and bell turret housing a bell dating to 1660 on the west gable. The north aisle was added in 1848 with the church re-seated and re-floored at this time. George Gilbert Scott restored the nave and chancel in 1862 with the west end rebuilt. The groundworks comprised the excavation of one area, a single trench 14.4m in length, up to 0.95m in width and up to 0.85m in depth extending from the west gable of the nave to the churchyard boundary wall to the west. The trench had a basic stratigraphy of two deposits comprising topsoil with grave earth beneath. The fourteenth century foundations of the nave were encountered with evidence suggesting that they had been repaired, almost certainly during the restoration of 1862. The complete absence of in-situ burials or other significant archaeological remains encountered during the trenching through the churchyard is likely to be due to the limited scope of the work carried out which ensured that the destructive impact on the archaeology was minimal.