The 25 largest homes for sale in the United States, ranked

Courtesy of Douglas Elliman PR

"Serenity Ridge" - a property for sale in Colorado - was originally built as a corporate retreat. It has over 45,000 square feet of floor space.

• The largest homes currently on the market in the US range from 32,000 to 70,000 square feet.
• We teamed up with Zillow to take a look at the largest homes for sale, from a historic Virginia manor to a recently renovated Bel Air mansion.
• Visit BusinessInsider.com for more stories.

The largest home for sale in the US is a whopping 70,000-square-foot abandoned Philadelphia mansion. To offer some context, that's about 15,000 square feet larger than the White House.

We teamed up with Zillow to look at the largest homes currently on the US housing market, including Red Sox owner John Henry's Florida vacation home and Cher's former Beverly Hills estate. Other luxury properties in the top 25 range from a historic Virginia manor to a recently renovated Bel Air mansion with room to park 80 cars.

Read more: There are too many multimillion-dollar mansions for sale in Los Angeles, and real-estate agents are going to extreme lengths to get them off the market

Many of these homes have been on the market for years, as luxury homes have become hard to sell. Previous reporting from Business Insider's Lina Batarags shows that customized houses - like many of the country's largest - are hard to sell as they include extremely personalized features that do not appeal to every buyer.

Keep reading for a look at the largest homes for sale in the US: