There's a part in the building code that lets you build your own house with help from your mates, so long as you don't pay anyone (apart from normal subbies like sparky and plumber), and so long as it's for your own residence - not to be rented afterward, and that you don't sell it within 5y. So if you're going to build anything unusual, it can be the way to go especially as many builders have trouble with anything that's not 4x2 framing on a concrete pad. Want something different? Better watch your builder like a hawk, or you'll turn around and hey presto you get the average "that's how I always do it" solution. Just my experience of trying to get stuff done on my place.
Twenty years ago, not a problem, but restricted building now, asfaik, requires an lbp on site, otherwise the inspector won't sign it off and you won't get your CCC. (Code compliance cert)
Unless you have a mate that is LBP.
On selling you may have a
Negotiating negative on that.
I used to design and build as I have an engineering background, but keeping up three licenses was too tedious so dropped design. So now can't lodge a consent app.
Can still lodge under a mates monica architech but it's a pia.
I don't care anymore,they have hamstrung the industry with bullshit requirements they can have it.
The latest BS was having to count insect/critters in a square meter and explain what effect removing a tree would have on life force of the forest for RC. fubar!