I think Jonathan may mean put a drainage trough in and drop the level of the driveway to a deeper slope so that the trough is below the DPC. If you look at the height of the DPC visible on the side wall, it's going to have to be quite a lot deeper. However, you will probably get away with no drainage trough as block pavers are supposed to be a porous material. I find the best source of local people for building projects such as this Yell. Have a look under your area or also take advice from people on your local Facebook pages which are always jam packed with names and number of people that have been used already and will come with good reviews. I'd go for a dark grey with an edge like this to compliment your front door.

Thanks for comments all. To answer some questions: 1) Fence on left is neighbours, we only own the slatted fence and gate, which are cedarwood (so would not want to paint/stain), 2) Door is composite (so again, wouldn't want to paint). As well as a sandy colour I did think of dark grey, so thanks for reinforcing that. the idea of a dark blue is interesting too...what about something like peignoir or setting plaster from F&B... neutral, warmish colour? bit weird?

Thank you to both of you. The colour palatte is really useful. Ive been looking at different materials, mostly natural stone or porcelain cladding. Im also considering a rendered wall. I took a drive round the neighbourhood today to see what I liked the look of.

If you made outer wall then its okay to build window on the side, your neighbor privacy will be maintained and you can get the sunlight needed, I would advise to move the garage to the front so it can be accessible for a car from the main road, you can still have direct path to the garden from the front if you move the enterance to the right and just put a fence, if it were me here's the layout i will do, it'll give more space for closet, bigger bath, utility room, and additional storage unit, so basically move the wall to the left and focus buildng that side, the previous garage will become the new master bedroom with en-suite