[akst]

Cheers I missed that… Updated my comment

Even with that still leaves planning controls, which dictates a lot constraint’s on development. In some jurisdictions you can effectively have planning controls that ban some floor plans. Admittedly I’ve just heard of federal HUD maybe this is some unprecedented case where it overalls local government planning and state laws, though I think that’s unlikely, I do know there’s plenty of fragmentation of planning regimes.

Point being, you may be able to construct something and it to tick the construction code boxes, whether the building you can make with it is permitted under planning is a different matter. Which can implicit ban those buildings

For example the zoning code could limits the type of dwelling to something and that thing has a pedantic definition which unique to that jurisdiction, or there’s a combination of max floor space controls and height controls that makes off the shelf prefab components ineffective at making the most of the allowed building envelope. Or a jurisdictions could require design contests for buildings at certain sites or a certain area so it may not be a given you can even use available prefab.

[TylerE]

"Manufactured home" probably isn't what you're thinking of.

It's what we used to call a mobile home or trailer. They get around a lot of zoning restrictions because they aren't permanent construction.

[akst]

I think you're right, I wrote my comment after skimming for stuff on planning and before getting the mobile home part. I hadn't considered trailers

> The comment from here onwards is about Sydney specifically, so if you're not interested this is your chance to get off.

Unfortunately in Sydney Australia this is almost certainly also regulated https://www.planning.nsw.gov.au/policy-and-legislation/housi...

It seems if you want you're allowed to set it up on your own property, which is surprising reasonable for Sydney standards. Just no more than 6 months after which you need to make a permit, possibly make a development application or something as it may be viewed as a permanent increase in floor space which tends to be tied infrastructure levies and maybe rates (think property tax). You can't set it up in the middle of the outback without some kind of planning proposal to rezone it to permit it.

At least with NSW (the state Sydney is in) the criteria are likely consistent across the state)

In Sydney Trailers likely aren't subject to Development control plans (DCPs) but other kinds of prefab/manufactured homes definitely are. Here's an example of a DCP, here is an example one from Randwick (one of 20-30 councils sydney is compromised of): https://hdp-au-prod-app-rcc-yoursay-files.s3.ap-southeast-2....

It regulates room size relative to floor ceiling distance, solar and privacy impacts on adjacent sites, minimum privacy and solar inside the dwelling (such as the amount of sunlight during the least sunny hour of the least sunniest day of the year), setbacks, etc, etc. If its next a heritage item it can't mimic it, it also can't take attention from it, has to confirm with some abstraction notion of sympathy to the heritage item