Century 21 Annex Realty is an independently owned and operated affiliate of Century 21 Real Estate, which is one of the largest residential real estate sales organizations in the world with more than 6,500 offices and over 110,000 real estate professionals in nearly 30 countries and territories. It is a fully licensed company that specializes in the buying and selling of commercial and residential properties. The firm deals in various properties, including single-family homes, condominiums, town houses, multifamily apartments, mobile homes, vacant land and commercial complexes. The company is comprised of more than 70 professionals and provides consulting and leasing services. Century 21 Annex Realty offers a variety of services, such relocation, property price evaluation, market analysis and financial assistance. It additionally provides online mortgage calculators. The firm is located in Wollaston, Mass.