No building, structure, or part thereof shall be constructed,
altered, moved, added, or reconstructed, except in accordance with
the Table of Dimensional Requirements (see Table 2) or as exempt therefrom
by other provisions of this Bylaw, and no buildable or built-upon
lot shall be subdivided, altered, or reduced, except by taking by
eminent domain or conveyance for a public purpose for which a taking
by eminent domain could have been made, so as to result in a violation
of the requirements of said Table.
No lot on which a building is located in any district shall
be reduced or changed in size or shape so that the building or lot
fails to comply with the lot area, frontage, coverage, set back, yard,
or height provisions of this Bylaw applicable to the construction
of said building on said lot. A lot already nonconforming to the above
dimensional provisions shall not be further reduced or its boundaries
revised so as to increase the extent of non-conformance or non-compliance
with the requirements of this Bylaw. If land is subdivided, conveyed,
devised, or otherwise transferred so as to reduce any lot conveyed
or retained in violation of this section, no lot resulting from such
division, conveyance, or transfer, regardless of its dimensions, shall
be deemed to be a building lot or entitled to a building or occupancy
permit. This prohibition shall not apply, however, when a portion
of a lot is taken or conveyed for a public purpose.
Except for authorized group housing projects and for combined
dwelling and business uses on lots in General and Local Business districts,
there shall be provided for each residential structure containing
one or more dwelling units, as allowed by the applicable district
regulations, a separate lot of land meeting the requirements of this
Bylaw for the district in which the structure will be situated, or
falling within the exemption for previously recorded lots. Nothing
herein shall prohibit or restrict the continued use of lawfully established
existing living quarters in buildings accessory to the principal residential
or other permitted use. The provisions of this paragraph shall not
prohibit or restrict the issuance of Special Permits for dwellings
accessory to the principal non-residential use in Limited Manufacturing
districts.
When the distance between any two points on lot lines is less
than 50 feet, measured in a straight line, the smaller portion of
the lot which is bounded by such straight line and such lot lines
shall be excluded from the computation of the minimum lot area unless
the distance along such lot lines between such two points is less
than 150 feet.