10% is actually the rule of thumb number that I have heard used for years. Of that 10%, about 60% typically goes to construction docs and the other 40 goes to the earlier phases of the job. Pre-design, if any, is often done hourly. None of this is set in stone anywhere and it will vary depending on the designer's experience and overhead, the complexity and size of the job, etc. There is certainly nothing alarming or unreasonable about asking 10%, and in design, as in most things, you generally get what you pay for.

Well balancing out material and costs labour costs is one thing but 2 story is quite a bit cheaper to build ; far less foundation and roofing area. It also simplifies the plumbing and of course is far more energy effective as downstairs heating will also contribute to upstairs heating. PROs can develop on this. And as Curt points out, modular is a very fast and cost effective solution which can allow you to put your pennies into better quality. Be very careful to select a known and competent professional if you go this way though, i don't know about NZ but europe abounds with cowboys ; low costers are to be strictly avoided.

Hi Marianna, I recommend you to ask for a quote from at least one contractor, to have a more accurate cost estimate. Regards!

I couldn’t buy it. I was dependent on 3 other people to pay the rent, and have just $15,000 in Kiwisaver. Every Big Wednesday I think “If I win, I’m gonna find out who’s got it, and offer them whatever it takes to get it off them”. It might not be a good deal, but it’s my home. I could write a whole essay on how perfect that spot is. My whole life revolved around living in THAT EXACT SPOT. I twice told the landlord and the agent together that I want the house, but can’t afford it. The second time I said “If there’s any helper person that can buy the house for me, that’s what I want to do”. Alas no. That might sound laughable, like the ultimate in dreaming, but of course I was gonna ask. It has an RV of $500,000 ($440,000 land, and $60,000 house). It sold for $508,000. To renovate it would be almost building new: at most you’d keep the perimeter wall, what isn’t rotten of the framing and weatherboards, and everything else would have to be new. So you’re getting up near a million no matter what you do. Re: Deserving a medal for living there for 12+ years: There were spots you couldn’t stand on the floor. The floor wasn’t remotely level – people got a kick out of how it ramped up and down. The bathroom ceiling was covered in mould (though I’m sure I killed it). Weeds and ivy grew through the walls into the interior. Termites and clothes moths had eaten it. Every windy day when I got home form work, I was scared to look at the roof, thinking “Is it still there?” Of course Healthy Homes killed it as a rental. Staying so long was my way of staking claim to it in whatever little way I could ‘cause I couldn't let go of the spot. I ate at my computer desk, with is the kind of desk I had in primary school. I liked to jump down those two steps leading to the toilet. I did pick up speed like you guessed, and had to put the breaks on myself each time. Yes, that bedroom is the noisy one. I had that one. I go to sleep at 6PM to get up at 2AM, and it was near impossible to get sleep in that room. Though the 90's house I'm flatting in at the moment has cheaper walls even worse for keeping the sound out.