Hi Dave
You may well be correct on the 'house' thought, but there appears to be businesses operating from it, so it may be an office complex, there is also a house, Helena.
Source, Paisley Directory and General Advertiser 1902/3:
Galbraith, Charles, Wine and Spirit Merchant, 64 and 65 George Street and 19 Maxwellton Street - house Marsilla, Craw Road.
Forrest, William & son, Chemical Manufacturer, Burnbank, Chain Road; Telephone No. 178; Telegrams, "Forrest, Elderslie".
PDGA 1906/7:
Lang, A.B, at H. Noble & son; house Marsilla, Elderslie.
Lang, John, jun., Wine and Spirit Merchant, 20 Broomlands - ho. Marsilla, Elderslie Road, Elderslie.
Source, Slaters' 1907:
Galbraith, Charles, Marsilla, Craw Road, Paisley.
Slaters' 1911:
Forrest, Wm., Marsilla, Ederslie, Johnstone.
Hope there is something here to help.
Geoff