Catmore consists of the church and a farmhouse in the hilly, wooded farmland of west Berkshire. The church has a single nave and chancel. Nave has a 19thc. bellcote on the W gable and opposed N and S doorways, both 12thc. The S doorway, described below, is protected by a porch with a neo-Norman external doorway. The N doorway, not described, is completely plain and headed by a segmental chamfered arch. There is a 12thc. font decorated with beakhead.

Catmore was held by Eadsige in 1066 and by Henry from Henry de Ferrers in 1086. It was assessed at 5 hides in 1066 and 3 hides in 1086. The overlordship remained with the Ferrers until it was forfeited in 1266 and given to the Earls of Lancaster, where it stayed until Henry Bolinbroke became king in 1399, when it passed to the crown. The descent of the tenancy is complex and the reader is referrred to VCH, but the advowson of the church was claimed by the Knights Hospitaller in the reign of Richard I.

The decoration of a font with beakhead is most unusual, and the presence of a beakhead on the doorway too implies that both belong to the same campaign, although the font is so badly preserved as to make attribution to the same workshop extremely speculative. Despite the beakhead, the chamfered doorway with billet must surely date from the second half of the century rather than the first, and a date in the range 1150-75 is suggested for both works.