How High Should Chair Rail Be?

30-36 inches up from floor is pretty common. You might get away with higher if your ceilings are high.

Our kitchen has wainscotting on one wall with the cap at 3 ft, top of rail. Our dining also had a rail, no wainscotting at the 3 ft mark. 8 ft ceilings in both rooms.

Again, you can go higher, but I think you should start in the roughly 1/3 up the wall range... get some painters masking tape and lay out the line... adjust to fit your eye.

Also, what are you doing above and below? Same wall up and down? Diff colors? Wood down? What's the plan?

Only thing to think about there is if there is a difference in texture or dark to light, the height of the rail can change the look...

30-36 inches up from floor is pretty common. you might get away with higher if your ceilings are high.

our kitchen has wainscotting on one wall with the cap at 3 ft, top of rail. our dining also had a rail, no wainscotting at the 3 ft mark. 8 ft ceilings in both rooms.

again, you can go higher, but i think you should start in the roughly 1/3 up the wall range... get some painters masking tape and lay out the line.... adjust to fit your eye.
Yes Thank you!