Glencairn at 6 Graigrossie Avenue, Coburg was commenced in 1859-61 as a 5 room stone house for Scottish-born Melbourne merchant, Robert Mailer, on agricultural land previously part of the Moreland pastoral run of pioneer Melbourne doctor Farquahar McCrae. Substantial alterations in 1882 and 1911 have enhanced the originally unsophisticated early colonial style farmhouse.
Glencairn is of historical importance as one of the oldest surviving buildings in the Coburg district and for the long associations with the locally influential Mailer Family. The house, of unknown design, and originally of simple classic revival detail, has been embellished by the addition of a crude monumental porch, delicate timber verandah, roof top widows walk and dodecagonal corner turret to create a picturesque, heavily eclectic composition of local interest.
Glencairn is now divided into separate apartments, and although both sections of the house have not been altered since 1929 the original building is largely indiscernable and the 1911 transformation is readily apparent.