Need help with cheap/easy storage

[hfxmike]

I live in a condo, and we are being forced to put storage lockers at the ends of our parking spaces. the cost is $828 for an 8'(w) x 3'(d) x (6'(h) plywood box!!

So looks like I'll be building my own.

I have a corner lot - so the back and one side of the "box" will be the existing concrete.

I have next to zero experience building things, and I'm not sure how to build a solid " L " shape that won't fall over.

---------------------------
|
| parking
| space as is
| left and top are
| the existing concrete walls
|
|
|

----------------------------
| |
|---------------------------
|
| what i need to build
| (red vertical line should be on right side)
|
|
|


it's too simple for me to figure out. but i can't bring myself to fork over $800 for this!
help
mike

 

[hfxmike]

here's the cheapest thing I can think of :
dl.dropbox.com/u/1124641/t2.jpg

(hang front and side from ceiling)

but - how to access the storage.....hmmmmm?

thoughts?
mike

 

[patan]

Hi Mike,
If it is possible for you to make holes in the ground and walls you could then seal in the timber.Then screwing the plywood onto them.