Are there any comparison websites akin to something like Uswitch in the UK, where I can look up and compare costs of utilities such as Gas and Electricity in the Houston area?

Google is usually my friend on this type of thing, but I am drawing a blank today!

Thanks in advance!

No, probably not, because you probably don't have a choice usually.

What Bob said...

What Hotscot said.

Here one Electricity supplier, unless you count PV.

Propane you can call around for current price.

Water, well.

For electricity, Texas has been de-regulated for years.
I switch providers every year to take advantage of "introductory" rates.
Try Power To Choose | Home

For Gas, forget it, it is who you are connected to.