When you sell, you incur agent fees and tax.
When you buy again, you have stamp duty.
Developing for the purpose of selling entails most risk (as opposed to re-developing to engineer rent and therefore capital appreciation). Not only does it need to cover those costs I mentioned, it needs a much more substantial premium built in for the risk/effort.
I agree, hate selling, hate paying fees, comissions and stamp duty
HOWEVER, there are other considerable Pros and cons in holding, well in my experience/view
CONS
1. You now have a brand new shiny OTP product on a smaller block of land, and lets for arguments sake say its worth $300k, in 5 -10 years, this prdouct will be second hand and no different to next door that was built 5 years before yours, hence you lose your stand apart factor. ie less potential for CG
2. My personal belief is that in terms of %, the CG is the lowest for brand new, small block dwellings, ie the typical OTP nightmare. As there is no more value add you can do to it. The person who has held on to their old dwelling on a substansial block of land has done much much better
3. Usually the yields are poorer for brand new dwellings, because of the higher selling price and not as high rental return, so that could be a significant opportunity cost
PROS
1.Depreciation: you will get crap loads of it!
2. GST discount, due to the margin scheme its not exactly 1/11 but for arguments sake, lets say it is. Say if you sold your $300k dwelling, then essentially your sell price is $272+GST, so you esseitnally 'lose' almost 10%.
However, if you keep it for long enough the GST is reduced or becomes negligible, ie if you sell in 10 years then you get $300k
I see those magazine articles that say "person A subdivided their block and now the back new house at the back is worth $X with a net gain of $100k in 8 months work, who intend to sell it"
but when they consider the GST, their net profit might only be $40k including agency costs!!