St Mary’s is the product of the work of several architects. In 1839 the original church on the site was constructed. In 1879, the rounded apse and altar by Charles Geoghegan was added. In 1894, the façade, the round belfry and the aisles were added by J.J. O’Callaghan. The fine tower with its delicate tracery was built in 1894 to the designs of W.G. Doolin. The main door has some good shallow relief carving to either side of the statue.
The interior has some good plaster vaulting and some good memorials – in particular a memorial to parishioners who died during the First World War. There is some stained glass windows by Harry Clarke.