Zillow is a great tool in subdivisions of like model homes where there has been recent sales of like models. It becomes more difficult in areas of custome homes.
Possible comparable for your home is 5804 Mount Holly rd sold 6 months ago by my company. 3 bedrom 3 bath on 2 acres 2112 sq feet living space. Listed at 249,900 sold for 245,000.
Feel free to call 443-521-0256 (cell) or email me at firstname.lastname@example.org for mor detailed info. Lacaze Meredith is a long and foster company with an office in Cambridge.