I love that you're looking to invest in restoring it. I initially would have wondered whether there's still risk of it being bought by developers when you put it on the market again as they may retain the existing home to appease the heritage overlay but build others on the large block, especially if the area if growing in demand. In that case I would recommend keeping it simple, retaining cladding, just doing cosmetic changes plus fresh but inexpensive kitchen & bathroom. However, after reading your follow-up post, it sounds like you're actually going to be doing a lot with it and the integrity & heritage of the home is important to you, so I would do it well to attract a premium buyer, pricing it out of developers' budgets. In that case, avoid aluminium windows - even the more traditional style ones don't look quite right. And windows make such a statement visually so I think it would be ideal to invest in original style ones. My mum just did a renovation on a 1920s Tudor home and the windows that had to be replaced she ended up getting cheaper custom made by a local joinery than by the big Stegbars etc, but she did shop around. Alternatively there are building materials vendors/recyclers that could have good original windows, or even demolition homes listed on gumtree can come up with some great finds providing you're happy to remove yourself. And you need quite a few, I wouldn't worry about not having them identical from room to room which may be an issue finding so many matching, provided all your trims are painted say in a fresh white, they should tie in nicely together. And again, I was originally going to suggest keeping the cladding if you're doing a simple renovate to sell, however seeing all the work you're doing to the rest of the house, I'd be tempted to remove it and uncover the weather boards beneath. A once beautiful double-fronted Victorian house near me (unlike yours it was a complete dump - holes in the floor, had been derelict...) with vinyl cladding was sold last year and the new owners have removed the cladding and there was beautiful and very well preserved brick-pattern weatherboard underneath (I can't remember the name of it, it may not be common in your region). So you could have well preserved weather boards underneath. And if not, if you're both handy (and have trade friends) it is fairly straightforward and relatively inexpensive to replace them. And with your extension you'd want the weatherboards to all tie in too. It may also be easier and cheaper with wiring and insulation/sisalation too? And lastly, just make sure there's lots of light coming into that central lounge room from the adjacent rooms. Those features are amazing! Good luck! I'd love to see the progress photos!

Maybe try Asian/Balinese style business or look at pinterest: that will give you idea that you could take to a tradesman and get a quote on bespoke or if you have a male that is very handy some great ideas on that link. https://www.pinterest.com.au/pin/419679259009258301/

i was wondering about a downstairs front door but then how would you use the upstairs entry and what about potential loss of the grandparents' bedroom and space taken away from the garage and storage... different internal stairs meant enlarging the whole downstairs floor area (and changing the roof) and sacrificing space needed for the new upstairs deck and future pool (and extending further into the yard encroaches on the neighbours' views) but the old front stairs can be lengthened to maintain the original look of the house and you'll find that friends and family will more likely come in through the garage or rumpus room and the old front stairs will be used for only very enthusiastic sales people and photo ops but you do need to confirm all the dimensions on the original floor plan as the room sizes are inconsistent and an accurate original floor plan (including exact location of doors and windows) will help ensure that my suggestions could fit with the least amount of alteration to the existing structure and may also invite different suggestions from other HOUZZERS and happy to redraw your plans if you can correct this copy

Hi Rae, I don't think they export to Australia. It is really hard to say without seeing an actual sample as colour on a screen is always varied, however the two alternatives to your Lucent Arctic White (top image Lucent Arctic White) available here for both the colour and style are the Caesarstone's London Grey (middle image) or Caesarstone's White Attica (bottom image). You may like to check these out by seeing actual large samples at a Caesarstone showroom near you. Hope this helps, Malcolm.