Browse Forums Building A New House 1 Mar 03, 2012 1:24 am In the very early stages of thinking about a new house and, before the economic reality sets in, am thinking of the possibility of a below ground garage in order to maximize garden space (we can't build a second storey). i know it will be exxy, as we are on a flat block of land. If possible, the garage would be along the side of the house, in the middle. I was hoping that someone could point me in the direction of where i can find how much 'driveway' distance is required in order to stay within maximum slope requirement? I think the height of the garage will be 2.5 meters. Where can i go for this info? Re: under house garages 2Mar 03, 2012 5:20 am To some extent it will depend on the car you drive. The extremes are; If you drive a super car you would need a slope of about 1:20 to avoid scraping the underside of the car at the top and bottom of the ramp. If you have a Landcruiser you could probably go to 1:3 The Harder You Try - the Luckier You Get ! Web site http://www.anewhouse.com.au Informative, Amusing, and Opinionated Blog - Over 600 posts on all aspects of building a new house. Re: under house garages 3Mar 03, 2012 8:51 am max driveway slope in the hills seems to be 1:16 we were told. Re: under house garages 4Mar 03, 2012 9:16 am daveinthehills max driveway slope in the hills seems to be 1:16 we were told. The regulations for the hills (if I have the right development) appear to differ: 17. The maximum driveway gradient within the site is 22%. The driveway within the footpath verge must fall towards the top of kerb, even on low level sites, with a gradient between 2% and 4%. Transitions are required where the change in gradient is excessive. Refer to Council’s Standard Drawing 16 for more details, a copy of which can be found on Council’s website: http://www.thehills.nsw.gov.au/Engineer ... l#driveway A gradient of 1:5 does seem to be pretty steep, but I've seen many driveways that are steeper than this in hilly areas... Some people apparently have nothing better to do than comment on other people's sigs. Re: under house garages 5Mar 15, 2012 1:57 am thanks guys!! i obviously need an engineering degree to do this properly, but with my very limited maths skills i think i need 9.4 meters to decline 1.4 meters. do-able....hopefully!! thanks for all your help Re: under house garages 7Mar 15, 2012 2:45 pm if you have a flat block you are talking about extreme costs. Costs that would exceed building a 2 simple 2 storey home. If your block had a pre-existing fall with about 3.0m from the position of the garage to the main floor level of the house then I would say it is a possibility, but on a flat block no way. Its not just the cost of excavating, retaining, but also water proofing and drainage you need to consider. Re: under house garages 9Mar 20, 2012 2:48 pm stacey74 regrettably i'm heritage listed, so can't go up (but i do have permission to rebuild in the original heritage style). do you have any idea how much it would be, ball park? without plans or even a concept it really is impossible to say. But if you say you couldnt afford to build up (ignoring the fact that heritage listing will prevent that) then on a flat block I would say you can't afford to excavate. Yeah my reasoning is just that those house posts are designed for vertical load not lateral. I just didnt want to risk interfering with the existing house… 4 11549 you need to make an application to your local council for this as they are the approval authority for driveways cheers Simeon 1 7096 Interesting. You have great clearance to damp proof course all the way around which is rare with so many cowboy landscapers and concreters. Is there sufficient fall… 2 2434 |