Zoning in Petersham

3 zoning codes on the assessor file.

Zone	Parcels	Median lot	Main use
RA	3	1.95 ac	Single Family Residential
.	1	3.9 ac	Single Family Residential
G	1	4.02 ac	Single Family Residential

Zoning codes as written on the assessor file; the zoning bylaw and map of the town are the reference. All towns.