I live in Cypress, too, so I'm assuming you also use CenterPoint. I think ours was upgraded by Centerpoint when they switched us to the remote meter reading system (no more meter readers traipsing through our yard). There was no charge for that.
Our PB, along with the others we interviewed, all said it was possible we would need to upgrade but to wait and see after the pool was completed. Well, the pool was completed, and nobody ever mentioned it again. Things work fine now, so there must not be a problem.
The other possibility of when it was upgraded was when CenterPoint rerouted our gas line which was running through the middle of the pool location. I don't think it was done then, because CenterPoint was very precise about every step of that process, and nothing was mentioned about a meter upgrade. But if I'm wrong then, the upgrade was included in the rerouting - about $350.
I had to contact CenterPoint. They bill you through your gas bill, so they need your account number, etc. The good news is CenterPoint was great to work with unlike moving the cable of the phone/Internet company I use.
The other good news is I've been pleasantly surprised (so far) at the cost of heating our spa. It may get worse as the water is colder and takes longer to heat. On average, my son uses it about 4-5 evenings a week. He was very worried about the cost of heating it. We've had 3 bills since heating the spa. I told him our gas bills have almost doubled, and he nearly fainted. Then I explained they've gone from about $17 to $30 a month. (our only gas appliance is the water heater). He didn't find my joke very funny.
Take care,
Suz.