What is the minimum acreage required to subdivide a lot?

For most areas of Town, the minimum lot size is 2 acres per parcel with a required 200 feet of road frontage.  Interior lots are allowed by Special Permit.  The lot must have an accessway of 25’ (owned by that lot) and the lot must be at least 150% of the required minimum acreage for that Zone.  So in a 2 acre minimum zone, 3 acres would be required.  Interior lot accessways must not be located less than 500 feet from each other.  In other words, if you are creating an interior lot, the driveway can’t be closer than 500 feet to another interior lot’s driveway.