I suggest the very first thing to do , would be to decide your budget and what you want to achieve , and to a certain degree what the suburb is like ? If it's the 'worst' house in an upmarket suburb , then $100K or even $200k may really lift its value , but if its in a 'cheaper' suburb , you may over capitalise . Like others , some things I'd look at -- -- Do the gardens , trim the tree , looks more like rank grass along the side of the driveway ? Maybe a white stone garden , with a Yukka ort similar . -- The concrete driveway looks 'drunk' , but that may be because of the shapes it was laid in ? Level it , take the front out to the street , talk to an expert about doing a one-run top coat of concrete . -- Remove the fairy lights , relocate the satelite dish . -- Personally , Id frame upwards on the top of the carport and lounge roof , and also the first floor roof , and put bright 25-30cm tall painted or powder coasted alloy panels -- cover the gutters and 'hide' the solar panels . Paint or coat them whatever colour you like , but I'd go for something like bright yellow or orange or red , mid blue , a crisp green ? -- Someone suggested brown wooden 'louvres' full-length over the upstairs windows . I'd be tempted to go with that idea ( buy 30mmx30mm pine , and a mid brown stain -- 6 or 8 'rails' along that upstairs on the side and front you can see in the pictures . Instead of mid-brown stain , a black/charcoal may suit better , especially if you go with those bright panels . -- Maybe a fence in the same 30 x 30 horizontal wood , same stain colour -- ties the upstairs to the 'ground' level ? Relatively budget , and can be done in several steps , but would 'lift' it no end IMO .

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Builders often roll their eyes when people ask for anything above the bare minimum when it comes to energy & thermal efficiency. But the builders won't be living there, or paying the power bills. You will be, so you'll want the most comfortable & energy efficient home, at an affordable price. So you have to ask yourself, where can you get the best bang for your buck, when it comes to comfort & thermal efficiency. First would be getting the orientation right, which is free. Then probably having appropriate levels of insulation (which may be above the bare minimum). Followed by things like building a tight house, with no drafts, incorporating sarking etc. Windows, even double glazed windows, are very poor insulators, much poorer than a well insulated wall. So if you have large areas of glazing it will effect your energy rating substantially. Even more so if it's poorly orientated. So where double glazing fits in will be very dependent on your climate, & also on your building design. Along with other glazing options, like window frame types, low-e glazing, window sizes. Although I don't believe window dressings effect energy ratings, this is also something that is important to consider. Honeycomb blinds or thick curtains with pelmets will increase comfort & thermal efficiency.

Zaffa, if you pop down to your local Spotlight store, they have examples of all types of blinds and shutters Great to get an idea of what each look like, various options, pricing, etc, etc. Only, NEVER EVER order shutters from them! I ordered mine from them when building and they took longer than the house to make them! Ended up having to use temporary blinds for months until they arrived. Also, they really let a lot of light in, so not great for kids bedrooms at all! Romans and rollers keep out much more light if you don't want to go down the full curtain with pelmet option. You can also go automatic blinds with rollers if you're concerned about boys touching the blinds too much. Adds around $500 per window I think I was quoted, so depends on your budget. Cannot automate roman blinds apparently. Best of luck in your decision.