That on the application of the owner Mr Wm E. Thompson of St Andrew Terrace, Strandtown, a new street on his property situate off Strandmillis Road marked street 3 on plan No 11618 be named Sandymount Street'. (2nd September 1896). “On application of the owners, (R.J. McConnell and Co) your Committee have changed the names of ‘Dingle street’ to ‘Waterville street’, and of ‘St Ives Gardens’ to ‘Sandymount street’.” Minutes of the Town Improvement Committee, 28th July 1897. The street was named after Sandymount House and Lodge which according to Dean had been built pre 1858 for William Watson a wholesale clothier.