KLS wrote:

I feel that I have no
obligation to spend extra time or money addressing the runoff issue
beyond what I need to achieve avoiding water entering my house. Am I
missing something here?

If you're in Texas, you don't have the right to correct a problem on
your property by exporting it to someone else's property. For example,
my downhill neighbor didn't like water running down the hill across my
property and onto his. He leveled his yard and built a large dam
against the fence. When it rained, his yard was OK, but mine had six
inches of water in it.

Further, state law requires the developer to submit a drainage plan for
the subdivision, and no one is allowed to change it without approval.

Do you have a lawyer friend? Take him to lunch and ask about these
issues.

--
Steve Bell
New Life Home Improvement
Arlington, TX