Does it matter if kitchen floor cabinets are not level?

A wooden platform would have been easier to build -- and easier to change in the future. Somebody's going to want to remodel that kitchen some day.

Yes. It does matter if the base cabinets are not level. The cabinets themselves don't really matter, but your cooking surface matters very much.

The cooking surface needs to be as close to level as possible, so that sauces, and oils for frying or sauteeing, cover the bottom of the pan to a uniform depth. If the cooking surface is not level, it's very difficult to prepare sauces properly: while waiting for a sauce to thicken on the low side of the tilt (where it's deeper), you're burning it on the high side (where it's too shallow). Same goes for frying and sauteeing.

Any cooktop that mounts directly onto the countertop will be only as close to level as the countertop.

A free-standing range can be levelled independently of the countertop, of course -- but if the countertops are not level, and the range is, it will be obvious. It'll look like a sloppy, amateur job of installation.

Assuming countertops are going on top of the cabinets, they should be level. That means either you have to have the cabinets level, or else screw around shimming the countertops, which doesn't sound advisable. Plus, we don't know what the "gradient" is. Why didn't you make the cabinet base level when you poured the concrete?

Doing it right is not always the easiest, but it is always "right". Get it level. You'll appreciate it later.

I had an addition put on, and they didn't get a floor level. It didn't much matter, but it drove me crazy until I had it leveled.

Sounds like a plan. Be sure you have all tiles at same height. I watched a neighbor carefully check the level of all the pavers he cemented to the sidewalk - unfortunately, he had each at a tad different height so he gets puddles.

You could just run a bead of caulk along base of cabinet, or wring out the mop; so much easier :o)

I think I'd try leveling shims 'till you finish it

jvm

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