The OMB trumps city by-laws.  Dec 9, 2010.

The story ends. The bylaws weren't such a big deal after it. The Tseng's got to keep their addition.

Finally, the Tsengs argued under section 45(1) of the city’s Planning Act that contemplates the possibility of a minor variance” under the bylaw.
Many houses violate the city’s bylaw for depth of a house, set at 14 to 17 metres. Since the Tsengs’ house was already in violation of the bylaw, it seems the OMB allowed this addition to stand.
The OMB won't explain the rationale because “decisions issued by the OMB are considered ‘res ipsa loquitur’ — the thing speaks for itself,” according to its website.
The board, in effect, said the addition was good enough to fit into the neighborhood's look and feel, building permits be damned." Liam Casey, The Star.  December 7, 2013.

Yes the Tsengs have finally won. But there may be a good outcome. This story will stand as one of the cases that finally prompted the end to the OMB's authority in Toronto. The Tseng case. © ERICKSONG ARCHITECTS INC. 2018