Disused vs. Unused

Disused
If a place, building,road or railway is disused ,it is empty and no longer used.

- A mouse ran out of the disused fireplace in the sitting room.
- The clearing out of disused workshops laid bare thousands of glazed tiles.

Unused
If something is unused:
. it has never been used :
- When I entered her office, I saw a lot of unused pencils , stamps and envelopes there.

. has not been used for a long time:
- His old car sat in the garage,unused.
- The books looked faded,dusty and unused.

. it is not used at present:
- The insurance on his BMW has run out and the car stands unused.