Exterior

The church is constructed in stone with lead roofs. Its plan consists of a nave with a clerestory, north and south aisles, a chancel, a northeast chapel, a southwest porch, and a west tower. The tower and the clerestory are castellated. The base of the tower is Norman, and the rest of the exterior is in Perpendicular style. In the tower is a clock dating from 1699.^[2]

Interior

The interior of the church is in Decorated style. The nave arcades are in five bays. The screens date from about 1500. The octagonal 19th-century font is in black Frosterley Marble. At the front of the church is a corporation pew. Three of the windows in the south aisle contain stained glass by Heaton, Butler and Bayne, and the rest is by William Wailes or by Wailes and Strang. The northeast chapel contains the monuments of Lady Anne Clifford, and her mother Lady Margaret Clifford who died in 1616.^[3] Lady Margaret's monument is free-standing in black marble with an alabaster effigy, and is attributed to Maximilian Colt, the King's Master Carver. Lady Anne's monument was created during her lifetime in about 1655–57 (she died in 1676). It is in black-and-white marble, with no effigy but a reredos with a family tree consisting of shields. Also in the church is a 14th-century female effigy.^[3] The two-manual pipe organ was built in 1661 by Robert Preston for Carlisle Cathedral. Together with its original case, it was given to St Lawrence's by the dean of the cathedral in 1683.^[4][5] It stands at the west end of the church under the tower arch. The case contains three turrets, each bearing an achievement of arms on its summit; beneath the cornice are the heads of three putti.^[3] There is a ring of six bells, all of which were cast in 1833 by Thomas Mears II of the Whitechapel Bell Foundry.^[6]

St Lawrence's Church suffered severe flooding in December 2015 from the overflowing River Eden.^{[7][full citation needed]}