Should I Lower

2015 Corolla L
Rear: floor to fender edge = 27.25"
Front: floor to fender edge = 26.50"

Going to be using 225/45/17 tires (25" OD)

If so, what type and how much?
If you haven't already, use a wheel offset calculator to make sure you get the fitment you're looking for, that low offset sounds like it's going to poke out of the fender. If that's the look you're going for then your ok.

I dropped my 2015 s about 2 inches all around. But I'm on stock wheels 17 x 7 39mm offset with 215 45 tires, every sits well within the wheel well
I'm going to get some konig hypergram wheels 18x8.5 38mm offset with tires at 245/40. I anticipate having to roll and or pull my fenders, I can keep you posted.
This past weekend I installed Tein Street Basis Z all around. Sits at 25.5” all around.
Nice job, I just dropped mine a bit more this weekend too, 24.75" all around with godspeed mono ss coilovers, crazy thing is, I still have an inch more that I can drop it.

How do you like there hight and ride? I'll have to take some pictures and post them