Browse Forums Building A New House Re: $36K site costs for P class soil 3Mar 27, 2020 4:20 pm P only stands for problem, this could be because there are several existing trees on site or an existing dwelling. There should be another classification (A, S, M, H1, H2 or E) which might help understand the claimed associated costs a bit more. It does seem quite excessive... Re: $36K site costs for P class soil 5Mar 27, 2020 6:33 pm In addition to Jays2007 answer, check whether the Geotech report identified decent founding soils/rock at each location (at least three locations). Where boreholes finish in fill, loose/soft soil (or further investigation is required which should be specified) there are question marks about footing type/founding depths so the fee could be ass-covering. Or, on the other end of things, you could have bedrock at the bottom of the boreholes but at a depth requiring piers so it becomes a matter of reducing the cost of the piers. For example, geotech. investigation for residential builds may only prove extremely or very low strength rock as lightweight equipment often used. This can result in closely spaced piles/piers when in reality the rock may be stronger and cope with higher loads hence fewer piers and reduction in cost. Or a thousand other reasons in between so you should probably post a bit more info to take out the guesswork. Re: $36K site costs for P class soil 6Mar 27, 2020 6:54 pm You've really given us no information whatsoever. P can mean a lot of different things. No one can know if $36000 is too much money, what are you basing your assumption that $36k is too much on? Re: $36K site costs for P class soil 8Mar 27, 2020 8:04 pm ![]() P only stands for problem, this could be because there are several existing trees on site or an existing dwelling. There should be another classification (A, S, M, H1, H2 or E) which might help understand the claimed associated costs a bit more. It does seem quite excessive... Yes we did thought the tree was a factor. We have a 17m tall tree in the front yard, which is 3m close to footing. Land size is 255m2. Site costs quote included 450mm diameter piers "P" class, waffle pod system slab "P" class. Re: $36K site costs for P class soil 9Mar 27, 2020 8:51 pm ![]() You've really given us no information whatsoever. P can mean a lot of different things. No one can know if $36000 is too much money, what are you basing your assumption that $36k is too much on? I've added more info in the post and added a screenshot of part of the geotech report. Hope that helps. Thanks Re: $36K site costs for P class soil 10Mar 27, 2020 8:53 pm ![]() In addition to Jays2007 answer, check whether the Geotech report identified decent founding soils/rock at each location (at least three locations). Where boreholes finish in fill, loose/soft soil (or further investigation is required which should be specified) there are question marks about footing type/founding depths so the fee could be ass-covering. Or, on the other end of things, you could have bedrock at the bottom of the boreholes but at a depth requiring piers so it becomes a matter of reducing the cost of the piers. For example, geotech. investigation for residential builds may only prove extremely or very low strength rock as lightweight equipment often used. This can result in closely spaced piles/piers when in reality the rock may be stronger and cope with higher loads hence fewer piers and reduction in cost. Or a thousand other reasons in between so you should probably post a bit more info to take out the guesswork. Thanks worldofmud.. I just attached a screenshot of part of the geotech report in my post. Hope that helps with some info. Re: $36K site costs for P class soil 11Mar 28, 2020 9:05 am Hi home135 Thanks for the soil report That is a standard blanket report but It doesn't indicate where the extra over costs are? For that you will require the preliminary and final Engineering details translated to your unique design. There are footings on your original quote ie, A,S,M? you'll need to work out the extra costs involved upgrading Slab and formwork Costs On average say there is 40m3 of concrete in a house ( see eg above) The base material concrete costs say $200/m3 Therefore, 40 x 200 = $8K + reo + forms + labour +pump You need to ask the builder/engineer where's the extra $36K going? In a nutshell the building contract says pay up or pullout... unfortunately some Sales reps/builders don't give you that information up front as it spooks potential clients So now you will need to scrutinise the above data and costs and negotiate with the builder if he wants your business OT you would have been better off financially if you sorted this out before you handed over a deposit for the preparation of plans (PPA) Cheers Chris Designer,Engineer (Civil,Const & Envir),Builder,Concrete & Masonry Contract.Struct Repairs Re: $36K site costs for P class soil 12Mar 29, 2020 9:20 pm why don't you ask your builder for timber floor on stumps? Foremost Building Expert in Australia,assisting with building problems/disputes, building stage inspections,pre-contract review advice for peace of mind 200 blogs http://www.buildingexpert.net.au/blog Re: $36K site costs for P class soil 13Mar 30, 2020 7:40 am We had a H1 soil classification and class P site (it was a knock down rebuild, which is always a P as they can't really do a full inspection). Our site costs at the contract stage were $35K, ended up being a few thousand less as they didn't need to go as deep with the piers as they expected. Our site costs were provisional, and were broken out into different categories, which is what I would expect any builder to do. i.e. Piering - $6250 Sewer - $4250 Stormwater - $4150 SL92 Reo - $2000 Re: $36K site costs for P class soil 14Mar 30, 2020 10:15 am I agree items should be broken down and explained. An observation on rebar upgrades All house slabs have mesh be it Sl82, Sl92 check the codes, upgrades from say SL82 to SL92 Reo mesh Costs are online $100-$80 = $20/m2 (Shop around builders buy it much cheaper) the cost for labour is included... I am curious as to what else is included in the $2K Also I do recommend that the Piers/Piles be properly checked on site here Checking concrete Piles with BOSCH Laser + App Cheers Chris Designer,Engineer (Civil,Const & Envir),Builder,Concrete & Masonry Contract.Struct Repairs Re: $36K site costs for P class soil 15Mar 30, 2020 11:14 am I don't know if it was 2K that was just an example... I didn't have the cost schedule handy, but remembered the other figures because I only received the final bill for those items a couple of weeks ago. I don't know about most builders, but mine wanted me onsite when the piers were done and we measured the depth of each one and cross-referenced them with the engineers plan. Only once the engineer and I signed off on the measurements was the concrete poured. Re: $36K site costs for P class soil 16Mar 31, 2020 10:00 pm ![]() Hi home135 Thanks for the soil report That is a standard blanket report but It doesn't indicate where the extra over costs are? For that you will require the preliminary and final Engineering details translated to your unique design. There are footings on your original quote ie, A,S,M? you'll need to work out the extra costs involved upgrading Slab and formwork Costs On average say there is 40m3 of concrete in a house ( see eg above) The base material concrete costs say $200/m3 Therefore, 40 x 200 = $8K + reo + forms + labour +pump You need to ask the builder/engineer where's the extra $36K going? In a nutshell the building contract says pay up or pullout... unfortunately some Sales reps/builders don't give you that information up front as it spooks potential clients So now you will need to scrutinise the above data and costs and negotiate with the builder if he wants your business OT you would have been better off financially if you sorted this out before you handed over a deposit for the preparation of plans (PPA) Cheers Chris Very helpful.. thank you structuralBIMGuy. Re: $36K site costs for P class soil 17Apr 13, 2020 3:33 pm What is not considered by StructuralBIMGuy is the cost of cut and fill excavation, soil removal or new soil, compaction, etc. Reo, concrete, poly, concreters labor, pump won't cost a fortune, indeed. Also, concrete is way over $200/m3 if your are in NSW. Re: $36K site costs for P class soil 18Apr 13, 2020 7:27 pm Just ask for a breakdown of the costings, review it and ask if the builder can get another couple of subby quotes. If it is fair and reasonable then move on and get cracking. Registered Building - Always happy to help where I can and simply loves the game. DM me if you need help in VIC. Hi The "P" just advises there are some problems with the site that the engineer needs to address, as you're a KDR the P would relate to the disturbed/loose soil with… 1 7348 ![]() Henley should give you some indication of site costs. Too many variable to give you any reasonable accuracy 1 13114 Hi El Forgo From what you are describing, I would be budgeting at least $6,000-7,000/sqm at an absolute minimum, possibly even $8,000. This factors in: 1. The sheer… 4 13466 ![]() |