They're mostly houses that seem to be built fairly recently looking at the condition (~5 years old or so), so they'd be built under the old City Plan. What happens to properties that are not approved though under either the old or new City Plans? I assume the buyer will then have to file out paperwork to get it approved, or if it's not approved would the Council request to have the building scrapped?
If Rooming Accommodation is self-assessed, does that mean it's automatically approved if the owner says it is? Seems quite lax to me. I just read the Rooming Accommodation code and there's no restriction on frontage, land size, or even minimum m2 of the building for 5 or less people.