Toronto’s building codes have been on the ropes for years.

But a growing number of home builders say the codes are being undermined by an increase in home-improvement materials that have a higher carbon footprint.

And with some homeowners now looking to recycle, the city is pushing for more recycling options to be considered.

1:21 With a new home coming up, this Toronto architect wants to know how to make the home better.

The Toronto architect has decided to build a custom home on his roof.