33 I' d go wider, my first shop was 30X48. 30 is narrow, my uncle saw mine and went 36X48, way nicer . Especially if you want a work bench along one side. My current shop at home is 42X64. 30x64 heated, 12x64 is a cold storage bay. All have been pole barns.

Checkout Mortin Pole Barns, there very nice.

$800 a year so no complaints. Next is a building at the new house with plans of a pole barn/home at the lake.

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I went with wood as it can be completely custom. The size of garage doors I wanted, The man door where I wanted it. The windows are the size & exactly where I wanted them. Other things like there are no windows that cant be seen from the house. Mine is 2x8 construction easy to add serious insulation. Its trusses too, nothing in the way. Im not sure if you can configure a kit building with that customization, maybe you can but I never looked into anything else very seriously

I went with a pole building 40 x42, already wish I'd have gone longer, but its a little late now.
Whatever dimension you think you want , just add a couple feet and you'll be close. Lol

A couple feet or 20 feet?

I need a bigger building

What size doors do you have to get that cat in?

Doors are 16'Wx14'H

Thanks, those are big