Are chickens noisy and smelly?

I would really like to keep a few hens around just for the eggs, and the garden fertilizer, too. However, the city where I live only allows the usual domestic pets, such as cats and dogs, and all dogs are required to be either in a fenced yard, or on a chain, or on the leash when walking them. This is actually a good thing, since you almost never se a dog being hit by a vehicle like you would of they were allowed to be just running loose. However, I wish the city would reelax the restrictions, and at least allow people to have a fw chickens around.
I can see not allowing a rooster, and I would not want to have my sleep interupted by one crowing at the crack of dawn (or even before), but the hens are not noisy, eat bugs, and aree not smelly as long as the coop is kept clean.