Yup and the builder probably had to agree to them in order to get building permits. They will turn into ordinances from the City or HOA when your hood is populated.It's possible that covenants exist without an HOA, especially if the neighborhood is new (if nobody has moved into any of the houses, there are no people to form a committee).
The good news is now is the time to challenge them if you want, say a pink, rather than brown fence.
Satellite dishes are rather hideous looking. But I think a prior poster is correct and you cannot be denied placement of a device that delivers telecommunications to you. Check this out though.