The gatehouse, called Monnow Gate, which gives Monnow Bridge its now unique appearance, was added at the end of the 13th or start of the 14th centuries, twenty-five to thirty years after the bridge itself was built.
Rumah gerbangnya, bernama Monnow Gate, yang memberikan tampilan menarik bagi jembatan ini, dibangun pada akhir abad ke-13 atau awal abad ke-14, beebrapa tahun setelah jembatan itu sendiri dibangun.