Browse Forums Building A New House 1 Jul 22, 2008 7:50 pm Our builders have estimated the following expenses in our contract :-
Sewer & stormwater - $6,000 Excavation of rock or shale - $16,000 Stormwater retention tank - $28,000 NSW Basix requirements - $18,000 These are all provisional costs & we should find out the actual cost by the end of this week. We may get some money back - oh, I do hope so ! We are hoping to hear what other people's provisional costs were, especially if anyone is also building in the Ku-ring-gai council area - as we think these are quite high. Let me know your thoughts please ! We are loving living in our new home ! https://forum.homeone.com.au/viewtopic.p ... &start=315 Re: NSW Basix & detention tanks... 2Jul 22, 2008 8:22 pm I'd like to know specifically what you're getting for $18,000 Basix requirements. Basix asks for very little and it would be hard to need $18,000 worth of stuff to meet Basix. Keep in mind that roof and wall insulation is something that you probably want regardless of Basix. Demolition August 2009, Construction Started September 2009, Completed December 2010 Re: NSW Basix & detention tanks... 4Jul 22, 2008 8:33 pm Well, we're having dramas with Ku-ring-gai Council right now over the retention tank stuff. Our builder quoted $19,000 to supply and install 2 x 10,000 litre underground tanks. I got a quote from a supplier, and the cost of the tanks is $9,700. Big difference. I'm waiting for the supplier to give me a quote that includes installation. Once I get that I'll let you know what they're charging. It's a pain, isn't it?!
Judie Re: NSW Basix & detention tanks... 5Jul 23, 2008 10:05 am this may be a silly question - but what is the point of the retention tank? Does it have the same purpose as a rainwater tank? After 4 years - we're in! Re: NSW Basix & detention tanks... 6Jul 23, 2008 10:16 am No, its designed to capture the massive downpour you cop in a storm, and then slowly release that captured water.
It's to try & prevent localised flooding of areas during large thunderstorms/heavy showers that can overload our inadequate stormwater system. Once upon a time it was the developer's responsibility to provide stormwater detention basins in new suburbs to detain the sudden influx of stormwater, and slowly release it into our barely acceptable stormwater drainage system. Often these detention basins served a dual purpose - as open green space, or even playing fields. Re: NSW Basix & detention tanks... 7Jul 23, 2008 12:37 pm There's some confusion here:
Retention tank = rainwater tank = keep water for usage Detention tank = provide a buffer for rainwater, but get rid of it. Demolition August 2009, Construction Started September 2009, Completed December 2010 Re: NSW Basix & detention tanks... 8Jul 23, 2008 12:48 pm commodorenut No, its designed to capture the massive downpour you cop in a storm, and then slowly release that captured water. It's to try & prevent localised flooding of areas during large thunderstorms/heavy showers that can overload our inadequate stormwater system. Once upon a time it was the developer's responsibility to provide stormwater detention basins in new suburbs to detain the sudden influx of stormwater, and slowly release it into our barely acceptable stormwater drainage system. Often these detention basins served a dual purpose - as open green space, or even playing fields. Actually, that's so true, We were renting a house opposite a park, in the old 2000 Olympic media village at Lidcombe. (The development was sold off & then rented out to media during the Olympics).When we moved in we laughed at the flood level indicators at either end of the park. Well, we stopped laughing earlier this year, when we had quite a few hours of heavy rainfall - wow ! The park actually disappeared along with the play equipment, benches, steps leading down into the park, etc..... the water was actually spurting like a fountain out of the large drain grate. The photos need to be seen to be believed ! Built the Eden Brae Cambridge 34 Family with Boston Corner Facade Re: NSW Basix & detention tanks... 9Jul 23, 2008 7:57 pm In our case, our builders built one big underground tank & put a dividing wall through the middle to make it two. One is the rainwater tank (retention). Once that fills up, all surplus water overflows into the detention tank. That's why we are a little puzzled as to why our builders have charged us 28K for a detention tank, then a further $18k in the name of Basix for a retention tank - when they are one & the same.
Costs such as roof sarking, wall insulation, heating & cooling etc were paid for seperately, (so even though they are part of the basix requirements) they aren't part of the 18K. So we have no idea what this is for. Judie, maybe the 19K you are questioning from your builder covers the excavation of the 2m deep hole, removal of soil + possible rock excavation costs as well as the tanks. Just an idea. We will let you know when our builders tell us the final costs ! We are loving living in our new home ! https://forum.homeone.com.au/viewtopic.p ... &start=315 Re: NSW Basix & detention tanks... 10Jul 23, 2008 11:44 pm Rikster,
Your costs for stormwater do seem a high. Are you having poly tanks? I had a hydraulic engineer who designed a concrete underground ( built in situ) which was just too expensive. So now I have gone with poly underground tanks, which is much more cost effective. What is the size of the tank? I have costs for poly and concrete tanks ( not the ones built in situ) so if you like can provide this to you Raz If you think you can, you can. Re: NSW Basix & detention tanks... 11Jul 24, 2008 12:49 pm Raz Are you having poly tanks? I had a hydraulic engineer who designed a concrete underground ( built in situ) which was just too expensive. Hi Raz, Our tanks were built in situ from reinforced blocks filled with concrete. Hopefully today we will find out the final cost ! We are loving living in our new home ! https://forum.homeone.com.au/viewtopic.p ... &start=315 Re: NSW Basix & detention tanks... 12Jul 25, 2008 8:59 pm Bloody Tanks!!!!!! Just thought I'd pre-warn anyone who cares there are a lot of additional costs to factor in relating to the rainwater and detention tanks than just the cost of the tanks themselves. The hole ordeal has cost us $40k. Would rather have bought a car.
So glad we are almost done. We are loving living in our new home ! https://forum.homeone.com.au/viewtopic.p ... &start=315 Re: NSW Basix & detention tanks... 13Jul 25, 2008 9:01 pm Rikster The hole ordeal has cost us $40k. Would rather have bought a car. Freudian slip? mmm....donuts Homer Simpson 1956- Links: Site Costs Ready Reckoner | H1 Addiction Medical Advice | Château TDL: The Backyard Re: NSW Basix & detention tanks... 14Jul 25, 2008 10:51 pm $40,000 is the cost of a pool ( nearly). Well that the kind of quote I got from my builder for a concrete tank so I changed the hydraulic engineer.
What is the size of your tank? Should be 15,000 - 20,000 litres. Well I had to have a 13,200 litre tank so the engineer has given me 3x 5,000 litre tanks. Waiting to see the quote the builder will give me for this. I assume will be around $17-19,000 cos they add their 20% markup. Is your builder willing to negotiate on the mark up for provisional allowances? I went and had a look at the new display homes for Young Homes at bella vista. One of them is very smart but not lovely and traditional like yours. Raz If you think you can, you can. Re: NSW Basix & detention tanks... 15Jul 25, 2008 11:03 pm to_do_list Rikster The hole ordeal has cost us $40k. Would rather have bought a car. Freudian slip? Sorry, I have holes on the brain ! We are loving living in our new home ! https://forum.homeone.com.au/viewtopic.p ... &start=315 Re: NSW Basix & detention tanks... 16Jul 25, 2008 11:06 pm Raz $40,000 is the cost of a pool ( nearly). Well that the kind of quote I got from my builder for a concrete tank so I changed the hydraulic engineer. The $40,000 includes everything for Basix & the council requirements :- Dual plumbing for house - rainwater & town water Pumping & failover to town water if mains is off or tank is empty Tanks Digging out of rock. etc We are loving living in our new home ! https://forum.homeone.com.au/viewtopic.p ... &start=315 Re: NSW Basix & detention tanks... 17Jul 25, 2008 11:07 pm Raz I went and had a look at the new display homes for Young Homes at bella vista. One of them is very smart but not lovely and traditional like yours. We have not visited them yet. We will do when we pick up the keys I'll let you know what we think ! We are loving living in our new home ! https://forum.homeone.com.au/viewtopic.p ... &start=315 Re: NSW Basix & detention tanks... 18Jul 25, 2008 11:08 pm Raz What is the size of your tank? Should be 15,000 - 20,000 litres. Well I had to have a 13,200 litre tank so the engineer has given me 3x 5,000 litre tanks. I'll have to remember to pull out the hydraulics plan & let you know. We are loving living in our new home ! https://forum.homeone.com.au/viewtopic.p ... &start=315 Re: NSW Basix & detention tanks... 19Jul 26, 2008 9:49 am Wow, those are scary costs for something that's out of sight. Is this just a NSW thing? AFAIK they don't do it in QLD. I think they still give people a big rebate for installing a rainwater tank on suburban blocks.
The costs of those tanks also seems huge (assuming they're just a buried tank). On our rural block we installed 2 x 45,000 litre buried concrete water tanks. Cost was $11,000, plus about $1600 for digging the hole. Can't quite see where figures like $40,000 come from in NSW but I feel your pain Re: NSW Basix & detention tanks... 20Jul 26, 2008 10:21 pm Ancient Mariner - these costs are specific to Ku-ring-gai Council. They like to make you jump through flaming hoops! I feel the pain: I'm trying to jump them right now.
Judie That was always going to be a challenge and a test of patience. Full marks to your mate. Did you discuss the wet area near the trampoline? 16 17324 In NSW the maximum deposit for building work is 5% until the builder provides HBCF insurance 1 4813 |