A so-called "monster home" in Leaside is being torn down, but only after neighbours launched a three-year campaign to stop it.

Construction of the supposedly two-storey home — neighbours believe it's actually three storeys tall — on Fleming Crescent began in 2012, when an older home was purchased then torn down.

As neighbours realized it violated city building codes they filed complaints, but builders ignored stop-work orders from city officials.

Toronto Rob Ellis Leaside

Rob Ellis led the fight against the new house. (Trevor Dunn/CBC)

It's a case of "build now, ask permission later," said Rob Ellis, whose back patio is currently dwarfed by the house.

Ellis, along with other Fleming Crescent residents, researched complicated building codes and attended committee of adjustment meetings during business hours to back up his opposition.

Mid-way through the building process, the home was sold to a new owner, who has agreed to knock it down and build something more in line with other homes in the area. 

But the lengthy process has left Ellis upset with the city's approach to dealing with this type of development issue.

"If neighbours don't show up, they assume people don't care or are comfortable with it," Ellis said.

"The city simply didn't pursue this as aggressively as we would have liked."

For more on this issue, check out Trevor Dunn's report in the video above.