JimBinMI, there's no such thing as "townships" in Texas. And the nearest "city limits" are 10 miles away. Naturally, there are some state laws regulating septic systems or other sewage facilities, and if you have less than 10 acres, you have to get a permit, have an inspection, etc., but if you have 10 acres or more and do the work yourself, you don't even have to abide by those things if you stay far enough away from the property line, and don't run anything over onto someone else's property. When you get new water service, they tap the main and install the meter. From there on, you're on your own except for an inspection of new construction to check for cross connections and such. For new electric service, the electric company will tell you what kind of pole, weatherhead, ground rod, wire, conduit, etc. to the meter base and master panel. From there on, anything you want to do. And you wouldn't believe some of the things the prior owner did to this property. From a single 100 amp master panel, and a 100 amp breaker, he ran wiring to a 100 amp breaker panel in an old mobile home, ran another wire from that same 100 amp master breaker straight to a water heater in the mobile home, ran another wire off the same breaker to an outside security light, then put a 70 amp breaker in the master panel and ran wires overhead on a couple of 4 x 4 posts to a 200 amp breaker panel in the shop, and ran wires from that 200 amp panel underground (about 3" deep) to a 70 amp panel in the barn. I still haven't figured out why the whole place hadn't burned down before I bought it. I added a second meter, with master panel, for the shop and barn, and replaced everything below the meter base (including the pole it was on) on the original meter, upgrading it to 200 amp service (and replaced that ragged old mobile home with a new doublewide). As far as your residence is concerned, you can pitch a tent or build a castle or anything in between, modify it anyway you want, anytime you want. If you have insurance or a mortgage, those folks might put some restrictions on you, but that's the only folks who will.
Bird