Houzz, the online home remodeling and design site and app which has a significant presence in Orange County, said Wednesday that it is in a big international expansion. The company said it has opened office and hired local manager in the UK, Germany, and Australia, as part of a big global expansion by the company. The startup offers up a service which provides information about home improvement, remodeling, and design, and helps connect homeowners with home improvement professionals. The company said it has 170 employees, roughly half of whom are located in Orange County. The company's corporate headquarters are in Palo Alto.