Tinkham Realty, Inc. sold 42 Birch St. to CHL Management of Londonderry, LLC. The structure is a free standing 5,760 s/f two story office building, zoned for office/medical use and is located across from Parkland Medical Hospital. The buyer plans on leasing a portion of the property for medical or professional use. Judy Tinkham, principal of Tinkham Rlty. represented the buyer and Chris Goodnow, principal of Goodnow Real Estate represented to seller, West-Rock Endowment Association, Inc. The selling price according to the Registry of Deeds was $530,000.