Site costs can be quite interesting when a site has fall like you have described. Many factors will contribute to working out what the exact site costs will be such as the stability of the ground and the amount of fall. How much fall does your block have? 1 meter? 2 meters? or very steep like 6 meters? Site costs for a sloping block can vary from $15,000 all the way to up $70,000. If you want to read further into what can contribute to your site costs have a look at this guide from Pivot Homes: https://www.pivothomes.com.au/building/building-site-costs/

Old post, nevertheless perennially relevant...........

How long is a piece of string?

$750K-$1M as a conservative starting point these days factoring in GST & builder's margins, probably though more realistically kicking well over $1.25M for a custom design

@Paul Di Stefano Design,

I think the very nature of these threads is that they are perpetual, so I for one love a new comment.

BUT

OMG that is seriously allot of money. I understand your explanation and you are probably right but I cannot see how anyone who has a normal job could afford such a home let alone getting a mortgage to cover such costs.

We're just country people and farmers but managed to build our own home entirely ourselves which in all fairness, very few people could actually do but we have a 30sqr limstone home with an indoor lap pool and not incuding about 70 mtrs of wrap around verandas which would make the house probably closer to over 50 sqmtrs given most homes have garages and verandas included in living space and the total cost for us is around $250,000

We don't however, have such modcons as remote controlled EVERYTHING and the sorts of things that can increase the cost of a home expedentialy depending of how many "you beaut features" are added to it.

We have to have tanks for drinking water and electric pumps to get said water into the home and another pump and a seperate water source for gardens. We don't have natural gas and given bottled gas is expensive we have no gas appliances so we rely for now on electricity and solar in the future as money permits.

I'm curious about whether your $1m is for a lavish bells & whistles house or just a standard 3 bedroom / 2 bathroom home because if it is, we saved HEAPS being DIY builders ha-ha

It's always heartening to hear stories of people achieving successful and great value outcomes.

My comment above was however not for standardised design or DIY scenarios, rather responding to an urban scenario with split level. The work we do is by nature customised and we deal with this sort of thing regularly & yes it (usually) involves a lot of money..as a flagfall and the sky's the limit. It's not however necessarily about bells and whistles and being fancy for the sake of it either. Rather it's about quality and long term value. You can spend a lot of money that lasts a long time which ends up being a more cost effective option than spending half as much but not lasting nearly as long. It's all relative and it depends of course also on land value, what is being proposed and the capacity for a proposed project to be financed. It's always a balance across a number of factors.

We can rarely pin down a specific number either. It depends on specification and the design detailing. DIY construction is a completely different kettle of fish to a contracted build, as is a more simple, standardised design & construction/ specification to a more complex and customised multi/split level scenario with intricate/unique detailing...as is also rural scenarios to tighter inner urban situations. It really is a case of how long is a piece of string and it will range dramatically depending on how you are going about it.

I had a client once who similarly was a DIY Owner builder with a trade background who did most of the work themselves. They similarly achieved the construction for a dollar amount far less that what it would have otherwise cost in a commercial contract. The design was also for mirror imaged connected townhouses so there was an economy of scale there as well, as well as being a compact and efficient design with certain details standardised to make the construction more efficient and materials relatively minimised with essentially 2 houses fitting within the size of a standard house, so they got 2 for the price of 1 essentially (good result!). BUT when you factor the practical hours "donated" or performed on the project for "free", including every hour of labour, construction management etc, supply and handling etc and apply a reasonable dollar value to it, as well as GST and builder's margin (or a construction management %) on top of the total, it's pretty much a resulting cost in the ballpark of what I was indicating.