Facebook may have put social networking on the proverbial map, but a smattering of tech startups aim to establish social networking platforms centered around housing. Houzz boasts 10 million monthly users who peruse the home design and remodeling site, creating image-driven idea books and sourcing contractors. Nextdoor.com focuses on neighborhoods, allowing its users to connect with neighbors and quickly exchange information about the area. Some sites -- like Miami Riches -- are virtual brokerages, piggybacking off of platforms like Facebook to market homes and client base.
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