A church dedicated to St Margaret existed in Roath since the medieval period.

[3] The church tower (without the spire envisaged by Prichard) was designed later by John Coates Carter and completed in 1926.

St Philip is still an operational church, but is no longer in the parish after the boundaries were adjusted in the late 20th century.

[5] An ornate north aisle chapel was added to the church between 1881 and 1886,[2] as the new mausoleum for the Bute family tombs.

[1] Seven large sarcophagi in red granite, were added to contain the remains of the members of the Bute family who had been interred in the previous church.