Herndon

A wheelchair ramp may extend into any minimum required yard when it is a retrofit for an existing principal dwelling; and necessary for a person with a disability/special need.

Residential Community Perimeter (fences up to and including 6 feet in height) May be located on residential common area within 20 feet of the public right-of-way subject to the provisions of section 78-115.2.

The following standards shall apply within all zoning districts throughout the town unless otherwise stated.

Barbed wire fences and above-ground electrified fences are prohibited in all zoning districts.

Height and location restrictions for walls and fences in nonresidential districts.

Height and location standards for walls and fences in residential districts.

The town shall require adequate financial assurance consisting of a performance guarantee agreement and a security...

The performance standards in this section apply town wide.

No machinery, mechanical apparatus or other stationary feature affixed to the property or structure, or operating within a structure operation or activity shall cause or create noise in excess of the sound levels prescribed in the table titled 'Maximum Sound Levels' when measured from the property line of the sound source or any point within any other property affected by the sound.

No activity or operation shall cause or create earthborn vibrations in excess of the displacement values given in this section. Maximum permitted displacements determined by D = K/f.

No operation or activity shall cause or create the emission of smoke from any vent, stack, chimney, flue or other opening that exceeds the density or equivalent opacity prescribed in this division. The total emission of particular matter from all vents, stacks, chimneys, flues or other openings of any process, operation or activity shall not exceed the particulate matter limitations prescribed in this division.

The release of airborne toxic matter (including radioactive matter) shall not exceed five percent of the maximum permissible concentration allowed an industrial worker when measured at any point beyond the lot line, either at ground level or habitable elevation, whichever is more restrictive.

Uses involving the manufacture, storage and utilization of materials and products that decompose by detonation may be allowed only as a special exception use. ... Such materials or products may be stored outdoors, provided that such storage areas are setback at least 70 feet from all lot lines.

No operation or activity associated with any land use in any zoning district shall be conducted so as to cause any electrical disturbance or electromagnetic interference that is not in conformance with the regulations of the Federal Communications Commission that adversely affects, at any point, the operation of any equipment other than that belonging to the creator of such disturbance or interference.

No operation or activity associated with any land use in any industrial district shall be conducted so as to discharge any liquid or solid waste products or materials into any ditch, stream, river, other body of water or drainage facilities; and there shall be no discharge of toxic or nonbiodegradable products or materials into any sewer or sewerage facility, except as otherwise specifically authorized by the governmental authorities having jurisdiction over the discharge of liquid or solid waste products or materials.

Exterior lighting shall meet the following standards: ... Residential property light fixtures are no more than 14 feet above grade. ... On nonresidential properties, outdoor lighting is no greater than 15 feet in height ... Light fixtures in parking lots containing between 100 and 250 spaces are no more than 25 feet high ... more than 250 spaces no higher than 35 feet ... where visible from residential properties, fixtures do not exceed 20 feet above grade ... ground mounted fixtures not more than four feet in height.

The following signs are prohibited: ... (15) Pole signs. (16) Off-site signs. (18) Signs on the roof surface or extending above the roofline of a building or its parapet wall. (19) Neon signs, except when no more than two square feet and installed in windows...

General sign standards, prohibitions, and licensing requirements.

If a sign is not installed within six months following the issuance of a sign license or within 30 days in the case of a temporary sign license, the license shall be void.

On single-family, residential properties signs conforming to the following provisions may be permitted without a sign license: a. One or more temporary signs noncommercial with a total area of no more than 12 square feet...