The only medieval church of Derby but very heavily restored and partly rebuilt. It consists of a 3-bay chancel with a N vestry, an aisled nave with an organ chamber, a W tower and a totally inappropriate brick W extension added in 1972 containing parish rooms. The 14thc chancel was restored in 1851-3 by G.G. Place of Nottingham, the rest of the church in 1859 by G.E. Street. The E wall of the nave is 12thc, including the E respond capitals of both arcades. Curiously the W respond of the S arcade also has a scallop capital. The remainder of the arcades are 14thc in origin, but the N arcade piers were renewed in 1859. The tower has 14thc tracery and was rebuilt in 1898, when the nave extended by one bay. Romanesque features recorded here are the nave arcade responds and a 12thc. grave slab.

The church of S. Peter, Derby, in the time of Edward the Confessor, pertained to one Leuric, and at the time of the compilation of the Domesday Book it was in the hands of Ralph FitzHubert. Robert, Earl Ferrers, one of the chief benefactors of the abbey of Darley, gave the church of S. Peter to that abbey in the reign of Stephen, according to one charter; but this was probably only as feudal lord, and not as the immediate donor.

Pevsner does not mention the W respond of the S arcade (just that the E responds have scalloped capitals) concluding that the E nave wall is Norman. The List Description notes that both respond capitalss of the S arcade are scalloped, which suggests that the W respond may be is reset.

Comparisons for the grave slab may be found among the collections at Bakewell and Darley Dale.