Did you know that a majority of housing available in many of the neighborhoods in Chicago is in multiunit buildings? It’s true. 2 to 4 stock, or homes where two to four families live in one building make up more than a quarter of the housing market across the city. That’s before you factor in the high-rise apartments and condominiums spread across Northwest Chicago. Vanguard Plumbing & Sewer knows this well since we just so happen to be the most trusted, most respected and highest-rated plumbing contractor serving these customers.