Building under, illegal height ?s

Sorry I can't seem to get the search option to work for me, so apologise if I've repeated any questions.

We're planning to build some rooms under our home. At present measurement is about 3cm short of legal height. I just read elsewhere that it's illegal to even build any of these rooms at this height and illegal to use them unless we lift the house. Is that correct?

I'm sure I've seen other homes with what are called 'utility rooms' built in where height did not meet the 2.40. Are they illegal, and does the council give approval for this, or are people just breaking the law doing illegal building?

I spoke to a real estate agent recently who said personally he would not bother to lift the house as it's so expensive not to mention inconvenient.

We already have a slab under the house so could go ahead, but now rather confused. Thanks for any help. :)

I think its about what you define the room as - I think 'habitable' is the definition - so ours is a rumpus, not a spare bedroom! 3m shouldn't be a problem, though. You will also need to check the flood levels for your block - ours is only 1.5m above sea level so to 'officially' build under I'd need to raise the house so the new 'ground' level would need to be 2m off the ground - back where it started from!

Have a look at http://www.brisbane.qld.gov.au/BCC:B...720:pc=PC_2334
http://www.ourbrisbane.com/living/ho...iderations.htm
http://www.brisbane.qld.gov.au/BCC:B...1860:pc=PC_224

The building code answers these questions pretty specifically. I think 2.1m is OK for kitchen and bathroom. Less than 2.4 for part of the room is ok for a sloped ceiling eg in an attic extension...

this is all from memory so check the BCA,

cheers Pulse

Minimum ceiling height of habitable rooms 2400 except a kitchen which can be 2100.
As Pulse said for a raked ceiling - but the height must average 2400 or better.
Non habitable rooms - bathroom, laundry, 'storeroom', wc, hallway, lobby, walk in robe etc 2100 min.

Where have you measured to? Is it a timber framed floor or slab? If it's timber framed and you have measured to the bearers, then you could get away with hanging your ceiling lining off the joists and leaving the bearers exposed.

Nevertheless, I've yet to see a building inspector with a tape measure. :wink:

(I once paid some plasterers to hang a ceiling in a new extension. The bottom chord of the trusses were 2440 from the floor. I told them the finished height had to be minimum 2400. They hung the furring channel with brackets from the truss and obviously couldn't read a tape, so we ended up with 2350 finished height. I spent the whole weekend pulling off roof sheets and reaching down through the trusses to unscrew the hanging brackets, while my Father in law lifted the ceiling from below. We got it back up to 2410. I was so p'ed off when the building inspector didn't even look at the ceiling.)

I thought it went on how old the house was ? and what regs were in place at time of council approval.
we have a brick and tile (highset) early 80's but the downstairs is 2370, once i put down new tiles on the floor this will go down to 2350(ish) but still think that this will be OK because at the time of the house being built that was the norm.
Am I correct in thinking this ?

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Am I correct in thinking this ?

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I'm pretty sure that you'll find the BCA requires any new development to comply, even if it's modifications to an existing dwelling. In fact, I believe that under BASIX if you modify an existing dwelling, you're required to bring the whole house up to standard energy efficiency-wise.

In short, they can't make you tear down your old house because the frame is not up to current specs but they can make sure that anything new you add to it complies.

The requirement is from finished floor level to finished ceiling level.
If you've got 100mm thick undelay I suppose your in trouble !
If you're trying to do something that's 'illegal', I've heard of people putting on the plans that it is a store room or big cupboard or whatever. Just don't put down that it is a Bedroom. Rumpus romm or any other type of 'habitable' room & then you can build down to 2100.

how do they police this ???
do building inspectors go round and check what people are doing via anonymous tip offs.
what sort of fines are we talking about.
in our stairwell the spacing for the banister was 140 mm wide which under current laws is illegal see pic,
so i riped this out and replaced it with a solid wall and glass top see pic.
if i get a call from an inspector what sort of trouble am i going to be in ???
It needed to be done for safety reasons with a little rug rat who is just walking and another one on the way. (thats my excuse :D )

There's no requirement - unless you're doing a major reno - to bring things such as your banister spacing from 140 to 125.
When you submit plans for an extension [such as asked about] you need to meet the requirements of the BCA & this will be checked by the building surveyor initially before the plans are approved & then by the building inspector at the designated inspections.
For a registered builder I think the penalty is up to 10 points or $10,000
For an owner builder [or a registered builder], the fact that the 'dodgy' work has been 'passed' does not relieve them of responsibility & who ever did the work will be liable when / if it goes to court.

thanks for the response.
sorry for getting off the subject, I will continue with my reno's and just hope that 2350(ish) is good enough after all what's 2" between friends :wink:
davo

It's a common question Davo.
Just remember if your going to sell that the rooms are 'storage rooms', 'wine cellars', 'golf ball lockers' or whatever . . . as long as they're not 'habitable' rooms :;

Hi All,

Having just had my final inspection on the renovations we had done to our house. Me being the owner builder, the inspector went over it with a fine tooth comb. Even measured the gap between the stair treads to make sure they were the right height. I made sure with the a builder friend that everything i had done was legal and met all requirements as specified on the plans. He checked the plans and measure every ceiling height on the rooms that were built down stairs. He made sure they were at least 2.4 for habitable rooms and 2.1 for any other room i.e. store room. Made sure bracing was in the right places and the right amount was used. I had to have every possible certificate you could image available for inspection as well. Trusses, glazing, termite, slab, footings............

It's a costly exercise to redo things, like changing ceiling heights etc. I didn't want to take that chance. I'm not sure if it was because i was an onwer builder or the certifiers are getting more strict with building inspections but he was certainly thorough in my case.

Cheers

Michael.

P.s. Everything passed, excepte for one small ant cap/termite barrier issue. Which has been rectified.

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I'm not sure if it was because i was an onwer builder or the certifiers are getting more strict with building inspections

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I'd say you were unlucky and got the 1 out of 100 that actually takes time to do a proper inspection. Was he a local council inspector, or did you enlist the services of an inspection company?

Hi SilentC,

He was with a private certification group. All though he was very thorough he was also very fair. I have found a few inspectors to be very arrogant and think all owner builders are dumb and wasting their time. The only time i saw a council inspector was when i had to build over a sewer line and they charged me some ridiculous amount of money for him to say "It looks ok to me" and walk away.

At least I know i have a house that meets all spec's and have no fear of hiding anything if i do sell someday.

cheers

Michael.