If you let them take an inch, they will take a mile.

The sidewalk is uneven about an inch and is considered a tripping hazard.

We just got 10 inches of snow .

If I have to charge someone for new damage or cleaning I want to make sure every single thing inch is documented. 

So the argument can be made by him that they aren't actually going in your yard at all. 4 ft on the outside of his fence is more than enough room for a walkway. 4" is how one typically indicates 4 inches.

Although very unlikely, babies and toddlers can still drown in just a few inches of water if left unattended.Your tenants need to get rid of that trampoline, asap. 

I've even offered to pay them JUST TO HAVE ACCESS TO THE 24 INCHES!

Further, the leaves in the summer made it impossible for a surveyor to discover the lines in summer using GPS (accurate to 1/4 inch).

It's really nice of you, but I have a feeling if you gave an inch, they'd take more than a mile.Here's the HEAP info for New Jersey (assuming the rental is in NJ):http://www.state.nj.us/dca/divisions/dhcr/offices/...There are also charities that will help if they are facing a cut-off, and some will pay their bill up to date once a year. 

If the basement is 50% + 1 inch below grade it is not counted in the floor area ratio total.