Take the lattice out, the lattice looks as though it has had its day, replace with horizontal or vertical slats, you can get in many different colours, using colour bond type product...would really give the fence a face lift

Congratulations Aaron on finding your "Forever home" & wanting to preserve it's 70's vibe. It does look like a big project to get your teeth into! I would think the black to be a bit strong & tend towards a warmer tone with the brick. Sandstone is also a light stone with yellows, apricots & warm tones. Woodland Grey from the Colorbond range has olive/brown tones which might suit. It depends on the vision you are trying to achieve but it looks like a natural modern style would suit the theme of the house. By that I mean taking cues from nature for colours. Good luck!

I would go with Monument. The house is dark brown so adding some relatively small surfmist elements wouldn’t change the perception of the house. At the photo above the surfmist works well as the roof is visible from the ground and it’s surfmist as well. The brown brick has those dark spots which go well with Monument. The house will look dark but elegant. In order to make the house more cheerful I would invest into adding as much greenery as possible. You might even think about adding couple relatively large pots along your side wall and/ or at the front right. You can also paint the front door any cheerful colour you like.

depending on your existing roof insulation a light coloured roof would be better to avoid overheating eg Colorbond Paperbark? with brick colour for guttering and downpipes, white for fascias and eaves and cladding and roller doors same as the roof