Are you saying this is incorrect?

I was thinking of 416 Campbell Street, but remembering it incorrectly. 

I couldn't find the listing but would be interesting to see the specs/price for comparison.Anyway on the architect,  I'd say both talk to one before any specific property just to get a better idea both in terms of attributes of the home to look for,  and also to get any ideas of difficulties/quirks with the particular jurisdiction you are looking at,  and then after the purchase (assuming you are trying to do everything above the board, permitted, etc.