Hiya! I would treat this as an opportunity to go totally steampunk! Put in a shutter, like the other folks have said, to hide the off centre window... then paint the bricks, and polish up the pipes and add a bunch of non functional complicated looking piping, with gauges and stuff. Of course, it would depend on the rest of your decor... I would also consider bringing the mortar up to brick-face level, before painting. If you went steampunk, you could keep the floor as is; it would fit right in! Get a sheet of copper or copper-look metal and hammer it up a bit and curve it slightly around the cistern IYKWIM, and hammer up a piece for a lid so you have access, (drop on lid, attach sheet to wall with dynabolts). Then paint up the pan in a nice distressed metal look, and seal with enamel clear lacquer, marine grade. Wooden toilet seat and you're 1800's sci-fi swish. I love odd rooms like this, because it's always going to look strange so you can make it spectacularly odd, instead of, 'oh dear, I tried to hide this, but...'

I have one of those Monika and I would venture to say that you wouldn't be able to cut it flat because with everything around everywhere having the waved top it would look really odd I think, and I doubt whether you would be able to paint it at least until the development is well over or you could find the developers all over you, along with residents who like yourselves have signed to agree to the covenants. A lot of people enter into these developments because there is a better chance of people looking after their properties however I will say that I am the only owner occupied in my part of the street, and I am forever weeding everyone else's garden, picking up the rubbish blown from the sea breeze on new builders not looking after their rubbish and the renters chucking empty beer bottles where they have sat on the steps drinking and throw the bottles into the garden and I actually water the rental alongside me as our gardens join, as yours probably does, and they refuse to water it. I want my place to look nice and if left to these renters it would look like homeless shelters. I think the tall pots and something like the black bamboo could look really good :)

Sorry to continue....the plan by Louise on the 20/01/2017.... But the laundry ( with internal access or through cloak room) and ensuite to the rear of the garage the master behind...... Then a Wir separating the master form the living or a bathroom...... The a fireplace if required against the western wall central in the house.... The entrance and small cloak room for the winter woollies against the garage and the other three beds at the front RHS with bath near.... The lounge/ kitchen/ dining in a similar layout but with minimal a walls blocking the view from the entry to the living/kitchen .... I like at lease a small wall dividing the living and lounge for the teenagers also.... If I get an chance I will sketch something up. Good luck this the paperwork... Plans are the fun part.

Are you sure the roof is stainless steel?? That is VERY expensive and only used in very exposed corrosive coastal locations since it lasts forever. I think it might be Zincalume, a low cost but very durable and very common roofing material that has a light silvery surface and should last for 50 years. Definitely do NOT paint the roof black (or any dark colour), it would add more than 10° to the internal heat load, and you would have to spend so much more on insulation and on-going AC costs just to get back to where you are now. Have the roof checked and repaired by a roof plumber instead. If it's an old leaky galvanised iron roof at the end of it's days, replace it with zincalume. The porch roof looks like it needs replacing, but I would replace it with new roofing, possibly the insulated sandwich panel kind, that has a smooth white underside, then add a gutter to the front edge so you don't make your visitors walk under a waterfall in the rain. The canvas awning suggested earlier would not last as long without looking tired and would require the removal of existing roof structure, so I think it would be the more costly option (and you would still have the waterfall problem). I would leave the front fence as is, it ties in nicely with the house, but trim the tree. The back deck could easily be roofed to match the front, and be more useful to tenants with weather protection. It would be good to make all trim colours the same, and against the cream brick I think the dark grey you have on the front door and columns works quite well. I would make the other windows and trim, as well as the weatherboards over the back door match that if it just involves painting. However, it's not essential and if it means changing powdercoat finishes it would be too costly to be worthwhile in a rental.