Removing base of kitchen cupboard

casper_gutman

molerat said:

They won't be glued together.  You need to look for screws attaching it to the back wall, to the worktop above and to the cabinets either side - the screws could be behind the hinge bracket in the cupboard next to it or if they have a false back behind that.  There is also the very small chance that they could be joined by a bracket behind. If the legs have screw feet they should be loosened to drop it down from being wedged against the worktop.

There could be dowels glued into holes in the base and sides. This is common with some suppliers where the units are delivered pre-assembled.

I think the key point is the one others have made though: it may well be that the OP actually needs to remove the whole cupboard, not just the base of the cupboard.