It is the intent of these regulations that any building, structure or use of land, either principal or accessory, lawfully existing at the time of adoption of these regulations, or any amendments thereto, may be continued although such building, structure or use does not conform with the provisions of these regulations. Once a nonconforming use, building, or lot has been abandoned, however, neither it nor any other nonconforming use, building or lot, respectively, shall thereafter be re-established.
9.03.210 
Any nonconforming use shall not be expanded above the level at which such activity existed on the date on which it became nonconforming by virtue of these regulations.
9.03.220 
Any lot on which a nonconforming use has been conducted shall not be used for any other nonconforming use unless it is determined by the Zoning Board of Appeals (ZBA) to be less detrimental than the nonconforming use already existing.
9.03.230 
The discontinuance of a nonconforming use and the replacement thereof by a conforming use, for any period of time, no matter how short, shall constitute abandonment of the nonconforming use. Such replacement by a conforming use shall occur when that portion of the lot or building formerly devoted to a nonconforming use is used for a conforming use.
9.03.240 
To establish that a nonconforming use has been abandoned:
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The owner must have voluntarily discontinued the use; and
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There was intent of the owner not to re-establish the use.
If the owner of said premises desires to resume said presumptively abandoned nonconforming use, he may apply to the Zoning Enforcement Officer (ZEO) to determine whether or not said nonconforming use was abandoned. The burden of proof shall be upon the applicant to show that the use was not in fact abandoned.
9.03.310 
Any building in which a nonconforming use is conducted may not be enlarged either in area or in cubic content for purposes of expanding such nonconforming use. Such a building may be otherwise altered, improved or rebuilt.
9.03.320 
A building in which a portion of such building is used for a nonconforming use may be enlarged provided such enlargement is only for purposes of conducting a permitted use.
9.03.330 
When a building in which a nonconforming use is conducted is damaged or destroyed by fire, explosion, act of God or catastrophe not brought about by or on behalf of the owner, lessee or other person in possession and control of said building, it may be restored and used for said nonconforming use provided that the restored building covers no greater area, has no greater cubic content, and is at least as conforming as to location on the lot as was the building damaged or destroyed.
9.03.410 
Any building which has been made nonconforming as to front, side or rear yard dimensions, height or minimum size of dwelling by virtue of these regulations or the amendments thereto may be enlarged, altered or maintained notwithstanding any such nonconformity, provided that the enlargement or alteration of said building shall not increase the degree of such nonconformity. Said building shall comply with all the other provisions of these regulations for the zone in which it lies.
9.03.510 
Nonconforming vacant lots may be improved if the lot is part of an approved subdivision, utilizing the Zoning Regulations at the date of subdivision approval.
9.03.520 
Nonconforming developed lots may be further improved if buildings or additions are in compliance with current regulations or the buildings and/or additions do not increase the current nonconformity.
9.03.530 
Lots not in an approved subdivision may be developed only in compliance with the current Zoning Regulations.