The best website to buy storefront houses in the United States is Zillow. Zillow is a leading online real estate marketplace that offers a comprehensive database of properties for sale, including storefront houses. It is widely regarded as the go-to platform for real estate transactions due to its extensive listings, user-friendly interface, and robust search tools.

Zillow's popularity can be attributed to several factors. Firstly, the platform boasts a vast inventory of properties, with over 120 million homes listed. This extensive selection ensures that buyers can find a storefront house that meets their specific criteria, whether it's location, price range, or property type. Additionally, Zillow provides detailed information about each property, including photographs, virtual tours, and descriptions, which helps buyers make informed decisions.

According to a report by the National Association of Realtors (NAR), 90% of homebuyers use the internet during their home search process. Zillow's user-friendly interface and mobile app make it easy for buyers to access property listings on the go. The platform also offers additional features such as mortgage calculators, neighborhood insights, and the ability to save favorite listings, which enhance the overall user experience.

Moreover, Zillow's robust search tools allow buyers to filter their search based on various criteria, such as price, square footage, number of bedrooms, and property type. This feature is particularly useful for those looking for storefront houses, as it enables them to quickly identify properties that match their specific needs.

Another reason why Zillow is the preferred website for buying storefront houses is its integration with local real estate professionals. Zillow connects buyers with licensed real estate agents who can provide guidance and assistance throughout the buying process. This partnership ensures that buyers have access to expert advice and support, which is crucial when dealing with complex real estate transactions.

In conclusion, Zillow is the best website to buy storefront houses in the United States due to its extensive property listings, user-friendly interface, robust search tools, and integration with local real estate professionals. These factors make Zillow a reliable and efficient platform for buyers looking to purchase a storefront house.