Your map has a real nice feel to it and is very detailed, but not too much. It is pretty small and should have a little more length to it just to prevent full on camping, and I can see real good things from you in the future just by seeing this is your first map. Many people just place props everywhere and call it a map but its really nice, except for a few key points.
Enjoy my criticism and help:
The Spawn Room
Its pretty big. I think you have made a world record for the biggest spawn room ever, congrats. A big room like this should never have so little decor.
I did not take a screen shot of the other side, but if you have a table with chairs that look like its for a meeting, place some books or paper work on the table too, or something to make it look like you didn't just place them their for detail.
This thing in the wall
If you have to think of yourself as a construction worker and think... what is this good for? Does it come with any purpose? Probably, probably not.... Maybe add a glass or vent that is barely see-through and on the other side would show a nice surprise.
This thing out of spawn
Anyone can go in here from jumping into this forest thingie from the second floor balcony thing.
First of all its horrible they can jump in, that's a bad spot to be in for anyone, and can easily camp there to hide... but it gets worse... there is no way to get out unless your a Demoman or Soldier, or sentry jump as an Engineer. NEVER EVER... and I repeat EVER allow players to enter a location where they can get stuck.
Lights without Light Source
Is this some sort of god, magic, or ghost? Maybe some unearthly kind of SciFi alien tech?
BLU and RED spawn both look the same
You should move the boxes, or change the types of boxes. Change around props, or add some new props that wont make a big difference in battle, like a mop or something. 2fort, and other CTF maps do this. They have the same layout but they never keep it exactly the same prop/decal/detail wise.
Floating Stairs
In any map you see stairs you always see stuff like boxes or barrels under them, that is because stairs don't float or support themselves... AND you don't want players under there. Thats a great place for a Engineer to camp