Browse Forums General Discussion Extension Cost Per Square Metre - are builders serious! 2Jul 10, 2012 5:41 pm My Knock down and Rebuild thread viewtopic.php?f=31&t=54685 Our Building Blog http://ourknockdownrebuild.blogspot.com.au/ Re: Extension Cost Per Square Metre - are builders serious! 8Jul 13, 2012 10:25 pm Looking at adding a two storey extension to our place about 70sm downstairs plus deck and 35sm upstairs including laundry two bathrooms and kitchen plus some internal work on existing house and cheapest quote was 550k. Most expensive 700k. Re: Extension Cost Per Square Metre - are builders serious! 9Jul 16, 2012 10:07 am As anything the more quotes you get the better idea you will have about what it should actually cost you. Have a look at the archicentre guide too as the OP has done http://www.archicentre.com.au/images/st ... -Guide.pdf It doesn't matter what field of work you are in there will always be those who are rough , those who are cheap , those that are both and then the good guys who do a good job for a reasonable price. Quote: Stewie D, its hard to see why a builder wants $2500m2 to do basic extension when you can get a basic/budget house for less than $1000m2 if you only get base level fittings. Economies of scale. You are talking about volume builders that get a lot of their materials at a third of the price that I used to be able to buy mine at and who pay their tradies almost half what I did. I worked out a quote for a friend of mine recently doing an average quality renovation and the materials alone came to over $900 a sqm if they didn't go overboard with really expensive tiles etc. Most of the cost guides I used to work out as being roughly 50%/50% labour and materials so for that job labour would probably be $900 as well - total $1800 psm without any fees or builders profit taken in to account. Stewie Re: Extension Cost Per Square Metre - are builders serious! 10Jul 16, 2012 11:09 am I am building with one of the better known Southern Sydney spec home builders and my house has come in at about $1300sqm and the inclusions are of extremely high quality. I cant believe the prices some of you are being quoted for extensions on existing homes. Re: Extension Cost Per Square Metre - are builders serious! 11Jul 23, 2012 12:03 pm The higher cost of renovations actually has to do with risk. The builder does not know what they are working with, and so has to add a risk premium in case their work damages the existing one though no fault of their own. They have to do a lot of work to stabilise the existing house and can't work the way they want to to maximise efficiency. When you knock down and rebuild the slate is clean, you can do all your slab in one day, trusses next, painting etc, which is much more efficient and hence cheaper. Re: Extension Cost Per Square Metre - are builders serious! 12Jul 24, 2012 8:37 pm Joeygbh is bang on... Risk, working in and around an existing structure, tying in new materials with old.... It's all labour intensive which bumps up the costs. The company I work for specialises in extensions and reno's and offers rough estimates around $2500-$3000/m2. Like anything else, you get what you pay for. Re: Extension Cost Per Square Metre - are builders serious! 13Aug 11, 2014 8:04 am Hi. I just priced a 40 Sq for about $350000. Owner doing a bit himself. He said it was the same price as for the 20 Sq extension quote he had got for the alternative to knock down and rebuild. Re: Extension Cost Per Square Metre - are builders serious! 14Aug 11, 2014 9:13 am Leighton, for 350k what kind of finish level is that? Sounds like good value. Re: Extension Cost Per Square Metre - are builders serious! 15Aug 11, 2014 10:51 am chrisandkate its hard to see why a builder wants $2500m2 to do basic extension when you can get a basic/budget house for less than $1000m2 if you only get base level fittings. I'd guess the OP lives in a well heeled area. When thats the case, expect quotes to be double in comparison to what they would be in a working class suburb. In 2005 I lived in such a suburb, and been quoted 250K to do such a reno as the Op's, when a new house of similar total size would have cost $170K (at the time) To do it myself as an OB it would have cost about $60K. After I disseminated one builders quote, I worked out he wanted $1500 a day in labour. Pffft. chrisandkate they do it because you can charge a Sh1tl0ad of money from unsuspecting people. Exactly. joeygbh The higher cost of renovations actually has to do with risk. The builder does not know what they are working with, and so has to add a risk premium in case their work damages the existing one though no fault of their own. I dont buy that at all. A house is either stable, or not. An extension will strengthen the house, if anything. joeygbh They have to do a lot of work to stabilise the existing house and can't work the way they want to to maximise efficiency. PLease elaborate on this stabilising you are talking about, because Ive seen an extension done next door onto a pre war colonial, and I watched it being built day to day. And there was no stabilising done. Rear wall removed, and extension just tacked right on to existing. joeygbh When you knock down and rebuild the slate is clean, you can do all your slab in one day, trusses next, painting etc, which is much more efficient and hence cheaper. True, but you are only talking about the efficieny around one wall (the wall that the extension is being attached to), and I would say its a moot point that is is much less efficient. In any case, normal efficiencies to the other sides of the extension should still apply. I dont see anything in your answer at all that justifies a doubling or tripling of price. Hi Has anyone recently completed an extension in Melbourne. Any idea at what I'd be looking at for an extension of our living room (adding 4mx5m). 0 8088 Seems good to me. I've been told $4-5k/sqm is reasonable in Perth. 2 11519 1) I had requested R6 ceiling insualtion batts, however I noticed that on some areas there are huge gaps which will allow hot air to sweep in, and also noticed black/grey… 0 4773 |