Front Yard Requirements. No building shall be erected or shall be reconstructed or altered so as to project in any way beyond the average setback line observed by the buildings existing on the same side of the street within the block at the time of the passage of this chapter.

Variance of Front Yard Requirements. When a vacant lot is situated between two improved lots, each having a principal building within 25 feet of any side lot line of such unimproved lot, the front yard may be reduced to the greatest depth of the front yard of the such adjoining improved lots, provided, however, that where any lot shall front on a right-of-way which is proposed, on the Official Map of the Town, to be widened, the front yard of such lot shall be as required in the district where such lot is located and shall be measured from such proposed future right-of-way.