Browse Forums Building A New House 1 Sep 12, 2021 12:46 pm I'm trying to figure out roughly how much a knockdown rebuild is going to cost. My most likely situation is going to - Double story - Total living area around 300-350sqm - Attached granny flat (ideally) or separate granny flat - ~60sqm - Preferable - high quality insulation (double glazed windows) - Second story - apparently there are different methods and the suspended concrete slab is the preferred method? So when I'm estimating, should I be looking at the whole built area? ie. 360-410sqm * $3000? $1.2 million seems too high, definitely wouldn't want to pay that much. But is that accurate? Hoping to get an idea of the upper bound, all inclusive - site costs, build, add-ons, etc. Re: Estimating costs 2Sep 12, 2021 3:09 pm ren_ho I'm trying to figure out roughly how much a knockdown rebuild is going to cost. My most likely situation is going to - Double story - Total living area around 300-350sqm - Attached granny flat (ideally) or separate granny flat - ~60sqm - Preferable - high quality insulation (double glazed windows) - Second story - apparently there are different methods and the suspended concrete slab is the preferred method? So when I'm estimating, should I be looking at the whole built area? ie. 360-410sqm * $3000? $1.2 million seems too high, definitely wouldn't want to pay that much. But is that accurate? Hoping to get an idea of the upper bound, all inclusive - site costs, build, add-ons, etc. Hi ren_ho Sounds like you are about to begin an exciting journey! We are building a number of homes with granny flats, both attached and detached so I have a pretty good understanding of costs to help you budget. The construction price will really depend on a number of things including: 1. Where are you building - the location impacts price significantly, even between Sydney, Melbourne and Canberra there is a big range 2. Site conditions - Fall of the site, quantity of rock to be excavated, are you in a bushfire flame zone or not, what are site access condition like for deliveries and materials handling etc. 3. Home design and your choice of building materials for instance you can choose $20/sqm tiles or $250/sqm Italian marble, or anything in between. And there are a range of other choices you can make. So as guide to help you with your budgeting, we are building mainly on the the Upper North Shore in Sydney and prices are ranging from $2500/sqm to $4500/sqm. We are doing a number of homes similar to the one you described for around the $950-1,000,000 mark. What I would recommend you do is to set a realistic budget and find a builder and designer who can work to that budget. Good luck with finding a site Cheers Simeon Architectural Homes & Duplexes - specialising in custom designing homes to your budget Get a Free Onsite Consultation Today or send a PM for information, questions or advice. Re: Estimating costs 3Sep 12, 2021 8:29 pm Thanks for the response. I'm in Sydney, planning to build in the south/southwest. I'm surprised at the cost estimate, at around 900-1m. I was thinking more like 750k-850k. I might have to adjust what I'm looking at. Re: Estimating costs 4Sep 13, 2021 2:12 am You won't be able to get 400 sqm custom home with suspended concrete slab and double glazing for $850K in Sydney those days. If you are talking about custom, $850k will buy you 330-340 sqm with mid-level finishes, without double glazing and concrete suspended floor. Re: Estimating costs 6Sep 13, 2021 9:03 am ren_ho Thanks alex76 - what do you mean when you say custom home? I'm thinking that we'll go with one of the big builders but ask for some customisations. Hi Ren_ho, if you are not looking at custom design and custome build house, you can email those volume builders asking for their price list, you can have a look at their base price to start with, it excludes site cost, landscaping etc just for a base build. You will have an idea what you will get for your budget. I think what alex76 meant was that you are unlikely to get what you asked for for your budget. This is from my last 12 months experience. Re: Estimating costs 8Sep 13, 2021 9:17 am many volume builders have designs that include a guest wing, or you can make some minor changes to existing plans to effectively create a guest wing which would be your granny flat. Most volume builders already factor in DG windows in their designs, upgrading insulation is also not uncommon with volume builders, though its usually sold at a premium. You can forget about suspended concrete slabs for first floor with a volume builder. I don't think your budget is unrealistic for what you're after, but you're going to have to keep an open mind and definately be willing to shift your expectations about what your budget will cover. SIte costs are also pretty variable. SO if its a knock down rebuild, expect significantly higher costs than say a greenfield estate. Dark matter scientist, can breathe underwater, mind reader and can freeze matter just by willing it. Trust me, its in my sig. Re: Estimating costs 11Sep 13, 2021 9:30 am We want to have a gym with some weights on the first floor. Possibly ~300kg of total weight (including weights, rack, other equipment), spread out through the room. I'm concerned that it could be damaging to the home if we have a timber setup. But I'm not sure if that actually matters. Re: Estimating costs 12Sep 13, 2021 9:51 am ren_ho We want to have a gym with some weights on the first floor. Possibly ~300kg of total weight (including weights, rack, other equipment), spread out through the room. I'm concerned that it could be damaging to the home if we have a timber setup. But I'm not sure if that actually matters. youd have 300kg of furniture and stuff in a room easily. I would suggest though if youre set on a first floor gym, you could speak to the builders about havng the space engineered with extra support for the purpose. They do it for large heavy baths in first floor ensuites etc. otherwise just find a design that has a suitable ground floor room for it. Many large homes have two living areas AND a theatre on the ground floor. Dark matter scientist, can breathe underwater, mind reader and can freeze matter just by willing it. Trust me, its in my sig. Re: Estimating costs 13Sep 13, 2021 11:35 am Like Noname said, $850k for 300-350sqm is not an unrealistic budget. It's definitely possible to work with that. You seem to be new to this since you didn't know what custom home meant. I'd suggest that you could start by researching volume builders first. Volume builders are those big name companies like Metricon. They all have pre-designed floor plans with limited alternation allowed. You have a few requirements for the house. That means it may take longer to find the floor plans that tick most if not some boxes of what you want. Then you can see what alternations they allow, and get an estimate quote. You will know where you are at. With a custom builder, It's definitely easier to get what you want. You can engage an architect or a draft person to draw up what you want, and present that to a few custom builders to get a price. From there, you can keep modifying the plan to suit your budget. Generally, custom builder's per square cost is higher than volume builders. That means you might have to compromise the size of your house but still keep those elements you want. A three-car garage or a workshop within the garage can turn into a gym on ground floor. That would be easier and cheaper than first floor. Re: Estimating costs 14Sep 13, 2021 11:41 am "You seem to be new to this since you didn't know what custom home meant." Yep, we're very new to this. We're in the early research phase. Good point about doing a ground floor gym. We're planning to build this home for the long haul, and have guessed that it makes sense to go for as high quality a home as possible (hence looking into the suspended concrete/double glazing/etc. Re: Estimating costs 16Sep 13, 2021 12:11 pm ren_ho "You seem to be new to this since you didn't know what custom home meant." Yep, we're very new to this. We're in the early research phase. Good point about doing a ground floor gym. We're planning to build this home for the long haul, and have guessed that it makes sense to go for as high quality a home as possible (hence looking into the suspended concrete/double glazing/etc. Saw your other post on here. You mentioned that you don't have a land yet? I think it's too early to design a house without a land. You can only design a house to suit the land you have. You can't pick a land to suit the house you want. The aspects of the land will totally dominate the design of the house. Plus, council has so many rules and regulations on the house you can build. Those things you want for your house might not be realistic without an actual land. Re: Estimating costs 17Sep 13, 2021 3:15 pm Yeah, we don't have land yet. We're trying to figure out what would be good land for us to build the home we want. The absolute requirement is a granny flat (for in laws), and the rest are all really nice to haves. Re: Estimating costs 18Sep 15, 2021 8:59 pm If you are going for a complete custom job, I would say 950-1.2m is probably accurate - depending on the quality of your finishes. I agree with other posts, you probably need to find the block prior to designing the house (unless you are going rural and will have a huge property, then you can design what you want and rotate for the best use of sun etc). Another option is to head to a display village and have a look at some of the volume builders - I think McDonalds Jones does granny flats too. You can get a rough idea of the costs of building a two story house through them, and then add the cost of the granny flat. Their "Avondale" with considerable allowances and some minor floorplan changes was costed (over a year ago) around 650k in Canberra (that said, i probably would have spent another 50k in their design studio). So, I imagine a granny flat would be 100-150. So total through them would be around 850ish. The granny flat's a great idea if they're going to retire and help with child care etc. But if they are only going to stay for a week or two, three times a year - I would save the money and hire them an Airbnb. Best of luck! Re: Estimating costs 19Sep 15, 2021 9:04 pm "If you are going for a complete custom job, I would say 950-1.2m is probably accurate - depending on the quality of your finishes." We're probably not going for a custom job, more like trying to build a high quality "standard design". Does that make sense? ie. We aren't very picky about layouts or facades or specific rooms, but we want it to be a long lasting house with good insulation. (Does that make it a custom job?) re: Your house costing 650 - Thanks! That helps give me an idea of where costs are. What was the size of the home? Re: Estimating costs 20Sep 15, 2021 9:26 pm https://www.mcdonaldjoneshomes.com.au/h ... floor-plan Custom = architect/draftsman and a smaller builder. Volume builder = already have designs (above) (you usually can make some adjustments) The cost of 650 was for double glazed with some good allowances for electrical/data/better tiles/appliances etc (although trade prices have increased in the last 12 months; so it’s likely a bit more now) When covid restrictions ease; just go to a display home, pretend you’ve got a block somewhere - they’ll happily talk your ear off about prices etc - just add 50-100k to whatever they say and you should be fine. I am not sure whether Perth has its own way of doing things in regards to this. Most of Perth has class A (sandy soil), except for some areas near rivers or hills. 2 13082 Looking to tile the facade pillars rather than rendering. Builder is quoting 2500$ laying cost for upto 10msq. The 2 pillars come to be 16msq. So laying costs are 5000$… 0 7537 10 15743 |