Excluding the expensive and sometimes pretentious "gourmet" kind, there aren't many good pizzerias in the Bay Area, and ones making good thin crust pizza are rarer still. Crusts are often bland, often chewy, and almost invariably floppy, combinations are usually either vegetarian or heavy on meats, toppings are tossed on top of the cheese in strange proportions, and all too often a tasteless, creamy-textured processed cheese substitutes for the real thing.
Patxi's in San Francisco and Palo Alto, better known for its stuffed pizzas, makes a passable thin crust pizza as does San Bruno's own Seniore's. To get one that's truly good, Windy City Pizza, in San Mateo, is the only option. All three kinds of Chicago-style pizza are on offer: not only the deep-dish and stuffed pizzas, but also the less widely-known thin crust style.
In Chicagoland, deep-dish or stuffed pizzas are a once-in-a-while thing, more popular with tourists than with the natives. In a city with many options for pizza, the thin-crust pizza is the go-to choice, the "Chicago-style pizza" that Chicagoans actually eat, usually at parties or as a takeout meal after a day of yard-work on the weekends. Although San Mateo is a couple of thousand miles away from the style's place of origin, the reason for this should be clear after trying a thin crust pizza from Windy City Pizza. The crust is tender and has a distinctly crisp bottom, and is spread generously with unsweetened tomato sauce. Fresh, high-quality toppings, in balanced proportions, make up the next layer, and are held on by real, tangy mozzarella, not gently melted so it becomes soft, but roasted until it is browned, bubbly, and stretchy. The textures are right, the flavors are right. The only thing they get wrong is in the slicing; the staff never knows what I mean when I ask for it to be cut into squares. "Cut a round pizza into squares?" But a good thin-crust pizza cut into wedges is still a good thin-crust pizza.
Windy City Pizza is located at 35 Bovet Road, near the intersection of El Camino Real and the J. Arthur Younger Freeway. At the time of writing, hours are Monday-Saturday 11 AM-10 PM and Sunday 11 AM- 9 PM. Getting there from San Bruno in rush hour traffic can take up to half of an hour, but it's a convenient pickup for commuters coming home from work farther south on the Peninsula or in Silicon Valley. Take-out orders are accepted over the phone, at (650) 591-9457