Fully Approved Building Lot in Berlin Boro! This nearly 1 acre parcel is fully approved for construction of a twin duplex Unit or (1) single family residence. Owner has done all the work applying for and obtaining all required township approvals. Looking for a new income property? These Twin units make great rentals! The choice is yours – if you’re not interested in a duplex unit, then utilize the property for a new custom single family home. The approved duplex construction drawings are completed and available from the owner for an extra fee.