Website Links Here are some other sites we recommend. portsmouthnh.com Guide to Portsmouth, NH and the seacoast. Urban Forestry Center For More Information: contact the Urban Forestry Center at 45 Elwyn Road, Portsmouth, N.H. 03801-5701, (603) 431-6774. Portsmouth Chamber of Commerce For More Information: contact the Chamber at 500 Market St, Portsmouth, NH 03801, (603) 436-1118 . UNH Community Scholarship Program Greater Piscataqua Charitable Foundation Warner House Strawbery Banke