It's one example of the challenges Toronto faces — in addition to emotionally charged issues such as cars parking in bike lanes and road safety.

"I had no idea when I bought my condo that I wouldn't be allowed to take my bike upstairs," says John Brown (not his real name). "They forced me to park it outside. The week I moved in, it was stolen."

More condos, more bike lanes, more cyclists... is there a collision in Toronto's future? Or are homes in the sky becoming more bike-friendly?

Toronto Star via Getty Images A cyclist uses the newly opened bike lanes on Queens Quay between Yonge and Bathurst on June 18, 2015.

Indeed, the cycling culture is exploding in Toronto, and the city is investing in biking infrastructure and building more dedicated bike lanes — all to encourage greener living, a healthier lifestyle and other benefits of "growing up vertical."

But how bike-friendly are all the condos going up around the city?

Out with the old

Generally speaking, most older condos don't allow unit owners to bring bikes into common areas such as elevators, fearing damage, wear and tear and inconvenience to other residents. Nor do they want people storing them on their balconies, for safety and aesthetic reasons.

Developers have historically dealt with bike parking by delivering only the bare minimum requirement, which is one bike space per unit, according to a City bylaw.

But how that's delivered is determined by the developer. Some projects install bike racks in car parking spots, leasing them back to the owners. More complicated security systems, such as those that involve cameras, are cost-prohibitive, so stronger locks are usually the next step.

The good news is that more condo builders are coming up to speed in catering to this growing demand.

Some buildings require residents to lock their bikes outside, while others "look the other way" when residents bring their rides inside, says condo industry consultant Jeanhy Shim.

"Bikes are kind of the last thing on the list" when condos are designed. "They're what you squeeze into any spare space," says Shim.

This is especially true in parking garages, where space is at a premium, not just that allotted for cars but also for mechanical and other operations.

But all of this is changing.

Developers may not be bringing bike-friendly buildings to market as fast as cycling in the city is growing (some are calling it the #SummerOfTheBike), the good news is that more condo builders are coming up to speed in catering to this growing demand.

Some builders provide access to Bike Share, itself a growing program in Toronto. Others are making bike parking a higher priority amenity, while others still are going even further.

You've heard of car-free buildings. How about bike-specific condos?

It's happening.