kind of an odd thing to put in... I'm assuming it's not against the HOA rules, and that he owns the property, or at least has a mortgage on it. Still, might make it tough to sell if the whole backyard is concrete.
FFG, you're still young albeit old, and impressionable if not set in your ways. If I were you, I'd have a jackhammer there by 10pm. I love the smell of jackhammers at midnight. Smells like victory.
Thanks Chaoyi Shih for the sig.