None of the requirements of this Zoning Bylaw shall apply to any municipal purpose or use authorized by vote of the Town, unless otherwise specified (e.g., § 201-8.1).
Where the application of this bylaw imposes greater restrictions than those imposed by any other regulations, permits, easements, covenants or agreements, the provisions of this bylaw shall control.
Construction or use under a building permit or special permit shall conform to any subsequent amendment of this bylaw unless the use or construction is commenced within not more than six months after the issuance of the permit and, in cases involving construction, unless such construction is continued through to completion as continuously and expeditiously as is reasonable.
The lawful use of any structure or land existing at the time of enactment or subsequent amendment of this bylaw may be continued although such structure or use does not conform with provisions of the bylaw, subject to the following conditions and exceptions:
A. 
Abandonment. A nonconforming use which has been abandoned or discontinued for a period of two years or more shall not be reestablished and any future use shall conform with this bylaw.
B. 
Alteration, reconstruction, extension or structural changes to lawfully preexisting nonconforming structures and uses.
[Amended 5-10-2004 ATM, Art. 30; 5-14-2007 ATM, Art. 9]
(1) 
Single- or two-family residential structures. The Building Inspector/Zoning Enforcement Officer, in accordance with MGL c. 40A, § 6, may issue a building permit to allow an alteration, reconstruction, extension or structural change to a lawfully preexisting nonconforming single- or two-family residential structure, provided that the alteration, reconstruction, extension or structural change meets the following criteria:
(a) 
Dwellings on nonconforming lots equal to or greater than one acre. Alterations, reconstruction, extension or structural change that complies with all current setback, building coverage, and building height requirements, provided that such alteration, reconstruction, extension, or structural change does not increase the footprint of the dwelling by more than 50%, and further provided that the lot nonconformity is limited to lack of frontage and/or failure to meet standards set forth in §§ 201-9.3A and B and 201-9.5A(1), (2) and (3).
(b) 
Other structures on nonconforming lots equal to or greater than one acre. The gross floor area of sheds and other outbuildings shall not exceed 10% of the main dwelling's gross floor area as determined by the data on file in the Assessor's office. Said sheds and other outbuildings shall meet all current setback requirements and be no taller than the dwelling.
[1] 
Decks shall meet all current setback requirements.
[2] 
Pools shall meet all current setback requirements.
(c) 
Main dwellings on nonconforming lots of less than one acre. Alteration, reconstruction, extension or structural change that complies with all current setback, building coverage and building height requirements provided that such alteration, reconstruction, extension or structural change does not increase the footprint or roofline of the dwelling.
(d) 
Other structures on nonconforming lots of less than one acre. The gross floor area of sheds and other outbuildings shall not exceed 10% of the main dwelling's gross floor area as determined by the data on file in the Assessor's office, provided that such 10% shall be cumulative to include the gross floor area of existing sheds and other outbuildings.
[1] 
Decks shall meet all current setback requirements.
[2] 
Pools shall meet all current setback requirements.
[3] 
Once changed to a conforming use, no structure or land shall be permitted to revert to a nonconforming use.
C. 
Restoration. Necessary repairs and rebuilding after damage by fire, storm or similar disaster are hereby permitted provided they are accomplished without undue delay and do not substantially change the character or size of the buildings nor the use to which they were put prior to such damage.
[5-9-2005 ATM, Art. 34; amended 5-14-2007 ATM, Art. 16]
A. 
Any increase in lot areas, frontage or yard requirements of this bylaw shall not apply to a legally created lot for single-family (and two-family) residential use in Residential Districts A and B not meeting current requirements, provided that the applicant documents that:
(1) 
At the time such increased requirement became applicable to it:
(a) 
The lot had at least 5,000 square feet of lot area and 50 feet of frontage on a street; and
(b) 
Said lot was not held in common ownership with any adjoining land; and
(c) 
The lot conformed to then-existing dimensional requirements; and
(2) 
The lot is not to be used for hotel, motel or nursing home use.
B. 
Such nonconforming lots may be changed in size or shape or their land area recombined without losing this exemption, so long as the change does not increase the actual or potential number of buildable lots.