Browse Forums General Discussion 1 Nov 17, 2010 11:03 am Hey Guys, I am new to this forum & I'm in the process of building a house in eastern suburbs in melbourne & i'm getting mixed answers with the cost of building a basement on a single storey 30>35 sq home. The land has only a slight angle,I have been told if i build a basement for garage/workshop using the entire area it works out cheaper as less retaining walls etc is needed. On other forums people have said the cost is $200 sq > $1200>sq but I have been told even $5,000>$8,000 per square? Can anyone please advise me roughly or have built recently. Thanks Marco Re: Cost of building a Basement 2Nov 21, 2010 7:46 pm Cost no idea really. I have built a basement in my house. Would do a few things differently next time. To build a basement into a 350 m2 house is not an issue. But how big the basement, the same size as the house would be expensive and one massive basement . A product I like for this but have not really used is Dincel, water proof. Cost $88m2 for the walls and this would support the slab above no probs. You would have to do some footings or a thick slab for the basement walls to sit on. Very easy to install but then needs to be filled with Concrete, 5m2 will use 1m3 of concrete. So about $130m2 plus labour for the walls. To dig hole and remove fill, hmm excavator will dig in a day if easy going and that would be $1000. Remove fill no idea, sometimes free, as someone else may want it, advertise in local rag. The roof of basement or floor of house will need something like bondek or condek, which is not particularly cheap but adds to strength. That gives you some ideas, builders are not too keen on basements. Cheers pulpo Re: Cost of building a Basement 3Nov 21, 2010 8:02 pm marco72 Hey Guys, I am new to this forum & I'm in the process of building a house in eastern suburbs in melbourne & i'm getting mixed answers with the cost of building a basement on a single storey 30>35 sq home. The land has only a slight angle,I have been told if i build a basement for garage/workshop using the entire area it works out cheaper as less retaining walls etc is needed. On other forums people have said the cost is $200 sq > $1200>sq but I have been told even $5,000>$8,000 per square? Can anyone please advise me roughly or have built recently. Thanks Marco I know of a cellar that cost $130k ..empty Re: Cost of building a Basement 4Nov 22, 2010 10:00 am Going below ground is expensive...engineering, building, excavation, waterproofing, retainging...etc etc My cellar is part underground. 1.6m by 5.4m by 2m is 24k. For a 350m2 basement...its going to be exy... But maybe worth it if you can properly utilise the space. Re: Cost of building a Basement 6Nov 24, 2010 2:04 pm Thanks for some input but you can built a 2 storey spec home for @250>300k complete with walls flooring etc & people quote 150k+ for an empty basement?? doesn't add up to me... note: above floor would not be on a slab Marco Re: Cost of building a Basement 7Nov 24, 2010 6:41 pm [quote="marco72"]Thanks for some input but you can built a 2 storey spec home for @250>300k complete with walls flooring etc & people quote 150k+ for an empty basement?? doesn't add up to me... note: above floor would not be on a slab Marco /quote] Think of it this way, you can easily pay $80K for a swimming pool ..and a lot of basements have become one. Re: Cost of building a Basement 8Nov 25, 2010 11:15 am Builders do not like building down too many unknowns. As well as expertise in the area is scare. My cellar cost 3.4 * 3.4 * 2.2 (high). Was no more than $5,000, but that was my labour, except the excavator (i'm not that fit) which is also included in the cost. good luck Pulpo Re: Cost of building a Basement 9Nov 25, 2010 11:58 am Just to break it down a little further... 350m2 area. So lets say you have to go down 3m for a good height. 350 x 3 = 1050 cubic metres of dirt. Lets say all up it costs $100 a cubic metre to excavate and remove. Thats already 105k. Add to that the foundations. So its a 350m2 slab with foundations. Whats the general cost? Lets just say 35k. Retaining walls and waterproofing. Lets keep it simple and your house is a sqaure. 19m x 19m is 361m2. So you are building a 76 metre long retaining wall with waterproofing at 3m high. Again, rough numbers $100 a metre. Thats 76k. So Excavation 105k Foundations 35k Retainning wall 76k Very rough numbers. Probably on the cheap side. 216k for a 350m2 basement. I'd probably go for it. But it would need to have proper supports which allow me to build me rooms in when I need/want/decide. Re: Cost of building a Basement 10Sep 21, 2012 10:21 pm Hi I am new to this forum am considering getting a house built with a basement garage of 300m2 1.can anybody tell me what sort of cost of this basement garage should i expect in the goldcoast,qld area please? I believe it will require some form of screwpiling to bedrock 2.was told by builder that hebel flooring system would be lot cheaper for first floor. I suspect he is guiding me towards hebel flooring for his own personal reasons. I have also heard from another builder that there is some sort of 'bounce' with hebel flooring and this builder recommended slab for first floor.Has anyone had much experience with hebel flooring? so would appreciate also a rough cost estimate of slab per sq m VS hebel for the first floor? much appreciated david Re: Cost of building a Basement 11Sep 23, 2012 4:01 pm Digging is expensive. I would say more than the average sqm rate for your home. Plus, basements leak water like mad. I doubt youll get warranty against leaks in the basement. Look at any unit complex and you will see how the water leaks through the blockwork. Keep everything above ground. Sqm rates are deceptive. It depends on the size of the home and the inclusions. DIY, Home Maintenance & Repair to do it properly you need to dig out the garden and waterproof the outside of the wall. There are some products you can put on the face of the bricks but the water is… 2 4611 custom probably not. Volume, most defiantly, but spec would vary. If youre doing a knock down, there additional costs associated with that that will eat into your budget… 1 10224 multiple occ properties are always billed by trades at a premium, rarely per sqm for the lot. You either have trades you know whoe will do by sqm or youre going to get… 1 2181 |