Honestly, cladding the house in grey because it is trendy right now is only going to date your renovations and is not going to do anything special to the house. What is the finish on the house now? I'm assuming you are cladding to save on maintenance which is very wise, but if you paint the windows you are only going to start another maintenance issue. The finish on them now has been designed to last - paint won't. I also note you have brown posts on the verandas, brown/cream tiles on the ground and a cream fence - this all has to be taken into consideration if you want to change to a grey palette and achieve something really special. It has to be a total package. Unfortunately, colours do not reproduce on computer screens so there is no point in me suggesting colours, but I would call in a cladding specialist or 3, they are used to doing this type of work and generally know what the finished result will look like to advise you. They should be able to suggest colours that will blend better with the browns and creams but still give the house a more individual and timeless look. If you are still not sure, put the photos of your house onto a Paint Company's website and paint it in a similar colour. To me though, this house really needs some softening, I think a bit of a cottage look will make it look much more warmer and welcoming. It is just not blending in with its environment. Work on your landscaping - look on Houzz for some ideas for a front path to lift your home out of the ordinary, you don't have to spend a fortune, just be creative, change the hand railing, maybe even fence the veranda or grow a hedge in front of it and screen one (or both) ends of it to give you some privacy to sit out there, Perhaps grow a creeper across under the guttering to really soften the front of the house and make the veranda more welcoming. Beautiful, well kept lawns and gardens and some special outdoor areas in your back garden will really enhance the house so the brown windows will cease to become an issue.

I think if you replace front door and glass panels as well as the old fashioned lights with something more contemporary it will make a huge improvement. I'd also remove the ironwork and as you cannot re-glaze place some pots and plants on the sides of the large windows to draw the eye away from all the green cross pieces on the windows. Eventually paint the gutters fascia in a light grey/green.

About your question about sourcing some of your own internal fittings. It is best you discuss this with the builder early on. Usually, the builder's contract will specify an allowance for particular fixtures. However, some may specify actual brand and model of fittings ie taps, toilets, sinks, etc in their quote, and they may or may not allow you to vary this. IF you are happy with those specified fixtures and you think the allowance amount is reasonable, then you can go with it. Otherwise, any changes or variances need to be discussed with builder, and it is very important this be discussed upfront and before any contract is signed. Some building contracts may also disallow some variances. In any event, carefully read the contract so you completely understand what you are agreeing to, and discuss any and all parts where you are not in agreement so these issues can be ironed out. Also, and this is my own experience and opinion, but I advise specifying in the contract the completion date AND if the build is not completed on time then what happens (consider that you may be paying interest on your mortgage, be financing a bridging mortgage, etc. and/or you may also have already sold your home and then have to pay rent until the build is finished). If you are in agreement with builder to source some of the internal fittings yourself, there are any number of suppliers and sources to investigate, and this might be a good way to keep your budget in check. There will be Houzzers who are experienced at this and can provide you with ideas. Just keep in mind that you will have to have all fittings READY and ON SITE when the tradesmen require them, otherwise you will be holding up the build and that is going to cost YOU money.

My kitchen is primarily 'burnt red' and the red bricks , which are slightly less brown than the burnt red . the ceiling is white , with stainless downlights , the rest is red , charcoal , white , the odd fleck of grey and black . The floor and blind are brown wood . I don't consider it overly decorated . It opens to the dining room , which is also a natural wooden floor , a black glass top table with black legs , black steel framed chairs with red leather seats and backs , an almost black wooden sideboard , a couple of big colourful abstract paintings , and 3 walls are wallpapered in a wheat weave pattern , the 4th is that red brick . There are 2 large wooden venetians too . The lounge is , yep , red leather lounge suite and extra chairs , there's even a red leather footstool that is heart-shaped ! The TV cabinet is custom made and is nearly 4 metres long , all wood with a dark stain . The floor is wheat coloured carpet with a large shaggy red rug , a black glass coffee table , a 65 inch TV and 7 speaker home theatre , a couple of those polished search light spot lights on wooden tripods , and several original paintings ( only 1 is an abstract , the rest are people , although a couple are Picasso-esque ! ) . Not much white , not a great fan . I'll put up some pics in a couple of years when I've tidied hahaha .