In ZIP code 99603, the average listing price is $267,558 this year, a small 4 percent drop from the year prior. Meanwhile, number of for-sale homes on the market marginally increased 1.1 percent, from 93 to 94 listings. Many of the residential properties situated in ZIP code 99603 have been landscaped, so the exterior of these homes is as well designed and as aesthetically pleasing as the interior. If you never want to feel rushed again, you can avoid the rat race and enjoy the benefits of country living in this vicinity. You won't feel cooped up in your ZIP code 99603 home when you have stunning panoramic views of the nearby bay to enjoy night and day.