It's standard practice here in Colorado to have secondary inside valves to your outside faucets. And you close those and drain your outside faucets every winter and then turn them back on each spring.
This is pretty standard up here as well from what I understand.
That said, I believe my home builder had some form of phobia of shut off valves - the only ones installed when I moved in were the for the main water & the hot water tank. For the outside faucets, they installed some kind of pressure release faucet that prevents burst lines. A home builder friend of mine was surprised to see them installed, but said do prevent burst lines and that with them you wouldn't need the inside shut off valves. I've been in the house 12 years now and have had no issues so far.
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