Baskets can be easily pulled out and just look for ones that have some depth, so you can take full advantage. You could even add a column of baskets down the middle for items you need to access daily... it's a neat and tidy look and sorting always helps.

Thanks!.. Though since it's overhead and depth is double the standard depth of cupboard... what's the best way of utilising the baskets?.. I saw a couple of ideas where a ladder was kept to access it.

We had good luck with a consultant at easyclosets.com. Be very accurate with your measurements for each wall.

Not sure about your style, but it might be fun to paint the wall above the shelf a different color (blue picture below).
Additionally, there are so many storage solutions (boxes, baskets, containers, etc...) that you can design inexpensively to make the space work for you. TXMaxx, Rosses, etc... have those hat boxes, decorated boxes, baskets and containers that are cheap and easy to store items.
If you draw out the space and take it to a local hardware store (Home Depot, lowes, etc...) they can design the space with cabinet doors so you can "hide" the items on your shelves.

Can you post some more pictures of the space?

I guess layout might be more helpful. I have attached layout created by easyclosets.com. It's not getting attached :/

Link for layout: https://postimg.org/image/96ip7lyq5/

Room: 6 ft X 9 ft

Height of the room: 11 ft. The overhead horizontal cabin in structure is along the 9ft wall and has 22 inches depth within this room and 22 inches depth beyond the room.

It's at height of 6.5 ft

It's in between Master bedroom and washroom (thus has two doors on two adjacent walls). Thus closet can be build on 2 to 2.5 walls of the room.

I plan to build walk-in closet + dressing room in it. Any ideas in general for the room as well will be helpful too.