My building has two apartments with existing aircon units attached illegally to common property, two owners who said they would “never” want to install one and two owners who asked permission to install them with the external unit on the roof. We decided to develop a by-law specifying the precise location where each lot could install its external unit. These locations matched the location of the two existing (illegal) units, nominated locations for the “never” units (with their input) and covered off the roof requests. It also covered ongoing maintenance, required materials and construction, hours and other conditions for tradespeople working, replacement units, damage to other lots, right to Committee to inspect work etc. Effectively it gives all lots permission to install aircon without having to seek permission – all they have to do is provide documents to the SM to check.