This building has looked locked and unused for as long as I have noticed it (about a year), but is clean and tidy apart from a few cobwebs.

My interpretation of the wording is:

LICENSED M.M.B.W.
W.g. Pearce PLUMBER
PHONE FF 1666
BELLAIR ST.
KENSINGTON
Estimates given

I love the old phone number format! See below for images of the wider sign and the complete building facing the early morning light. At this time of year, leafy trees shade the sign throughout the day.