We are moving. I currently have an A-frame tractor type coop:

coop area is 4x4 and run is 6x4.
New house has much smaller yard BUT it has a "shed" on one of the narrow sideyards. I'd like to section off part of the shed and then attach a run to it.
This is the wall of the shed that faces the backyard:

my husband is 6'3" for reference.
There is no opening on this side. My idea is to put an access door for me and a small door for the girls on this side, add a wall on the inside (maybe ~4 feet in) so the rest of the shed is still useable and accessible from the front, where the gate is. Anything I should beware of since it is right up against the fence and the house siding?
coop area is 4x4 and run is 6x4.
New house has much smaller yard BUT it has a "shed" on one of the narrow sideyards. I'd like to section off part of the shed and then attach a run to it.
This is the wall of the shed that faces the backyard:
my husband is 6'3" for reference.
There is no opening on this side. My idea is to put an access door for me and a small door for the girls on this side, add a wall on the inside (maybe ~4 feet in) so the rest of the shed is still useable and accessible from the front, where the gate is. Anything I should beware of since it is right up against the fence and the house siding?