Category Archives: floor plan

What I learnt today – Provisional Sum

From Consumer Affairs Victoria: “A reasonable estimate of the cost of certain work if the builder, after making reasonable enquiries, cannot give a definite price when the contract is signed (for example, supply and installation of air conditioning).”  CAV recommend avoiding these in a building contract.From HIA: Provisional Sums “are used where there is a mixture of items and labour (installation). The PS allowance is the estimated cost price for the builder to do the work (item plus labour) for the owner. The price of the PS to the owner is the actual cost price plus the builder’s margin applied to the amount by which the actual cost price exceeds the PS allowance. The owner can choose whatever work they want within the range of work contemplated by the PS description. Therefore, unlike a PC (prime cost) item, where there is a change to the scope of work, there is no need to do a variation.”


Our first attempt at designing a new home (Federation Style)

Last week we got the first draft of a design (based on our design attempt above) with one of the building companies we are exploring options with.  We have paid $200 to get a floor plan design and ball park estimate done. Over the weekend we went back with our changes and questions.  One of the issues that has come up is the kitchen.  We (mainly “I” because I don’t like stone bench tops) want timber bench tops.  This company doesn’t do them, only Caesar Stone, and this was the second occasion in which the sales person tried to talk us out of timber.  Yes we know it requires maintenance, but timber is so much warmer and inviting and can look really spectacular!  Its also going to be a Federation Style home, so timber fits with the style.  So now we have to include the kitchen as a “provisional sum”, although we can use the same kitchen builder as the company uses, and they’ll negotiate the same rate for us.  (Starting to sound dodgy here?).  It got even weirder when the sales consultant who is doing the design wouldn’t give us the name of their kitchen company so we could go and look at what they do and decide whether they have the look/product/style/quality we want.  So now we are researching kitchens and trying to locate kitchen companies who do timber bench tops – which is quite difficult as we keep getting told no-one wants them.
I’m still not sure how this provisional sum would work.  If we go to a kitchen company and find the kitchen we want, get them to quote for supply – is the Provisional Sum an estimate for the builder to install it, or to purchase it on our behalf and install it?  (plus their margin of course!)
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A bit of history

I mentioned in the first post that we started this process 4 years ago with a design concept.  The two pictures here show our current floor plan and our design concept.  This was done in September 2006.  The cost estimate was $130k to $170k.  We had planned to do the renovation and extension in stages so we could stay in the house.  The extension involved going out to the side and the back.

Existing floor plan
Design Concept 2006
Mid-2007 we thought it was time to make a start and as I work as a contractor I planned to take a 3 month break between contracts and get the drawings done and tender for a builder, at the same I would get the house re-stumped.  This was the second time we had tried to get the re-stumping done – the first time the contractor never showed up and kept putting us off until we finally stopped contacting him.

And then we hit a bit of a hiccup – it was a result of watching House.  Fans of House will know the episode I am talking about.  House performs surgery on a foetus inside the womb, and the foetus grabs hold of his finger.   At that exact moment my body clock started up and immediately went into over-drive.  Up until that moment I had had no desire to have children; I waited 10 days for it to go away before telling my husband.  About 5 months later I was pregnant with Oscar.  This obviously caused us to rethink our plans.  Not wanting to try and do the extension while pregnant or with a new born, we decide to hold off and just renovate the existing house.  So we re-stumped, re-wired, put in a new heating and cooling system (sized for the extension) and had the roof re-sealed and painted.  That was hard enough!
Then Oscar came in 2008 and all of a sudden the house felt very small.
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