Discourage any encroachment by unrestricted commercial or industrial establishments or other uses which might adversely affect the specialized office, service and residential character of the district.

Encourage the conversion of existing dwellings to office use in order to encourage the preservation of sound residential structures, which maintains the visual character and architectural scale of existing development.

Attract professional office and service uses which do not generate large volumes of traffic and continuous customer turnover.

Encourage the orderly, well-planned development of professional and business offices and limited service establishments within the district when a proliferation of unrestricted commercial usage would be undesirable.

Professional offices for doctors, dentists, chiropractors or any other licensed practitioner of the healing arts for humans and lawyers, engineers, architects, urban planners, accountants, economic consultants and business and management consultants.

Business offices providing credit services, security and commodity brokerage, real estate sale, employment counseling, insurance sales, advertising and mailing and stenographic services.

Single-family and two-family dwellings, in accordance with the requirements of the R-3 Residence District with respect to area and height regulations as set forth in § 300-203E.

Mixed-use structures containing any combination of permitted uses as set forth in Subsections A through C, provided that in a mixed-use structure used in part for residential purposes, a maximum of three dwelling units shall be permitted.

Accessory uses on the same lot with and customarily incidental to any of the above-permitted uses.

No-impact home-based businesses in accordance with the standards set forth in § 300-26 herein.

Conditional uses. The following conditional uses shall be permitted when authorized by the Board of Supervisors, pursuant to the procedural requirements set forth in Article II, § 300-60, of this chapter and additional criteria set forth in Subsection B below:

Standards for consideration of conditional uses. The Board of Supervisors shall determine that the following standards are met, prior to granting approval of a conditional use application:

As a special exception only, communications antennas, in accordance with the provisions of § 300-25, mounted on an existing public utility transmission tower, existing building or other existing structure, and communications equipment buildings only upon a showing, in addition to any other that may be required under this chapter, that denial of such a special exception would have the effect of prohibiting the provision of personal wireless service. Communications towers are not permitted.

Lot area. A minimum of 40,000 square feet shall be provided for every principal building erected or used for any use permitted in this district. In addition, a lot width of not less than 150 feet at the right-of-way shall be provided. Conversion of an existing structure to any use permitted according to § 300-415 on a lot smaller than 40,000 square feet may be permitted as a special exception by the Zoning Hearing Board, provided that all required parking can be properly located on the same lot or on an adjacent lot to which access is legally guaranteed, that all additions to principal buildings be located at least 20 feet from all property lines and that all parking be located at least 15 feet from all property lines. The structural appearance of any building to be converted, in terms of roofing, siding, entryways and porches, windows and other exterior features visible from the public way, shall not be altered other than to repair or replace the original material or style of the building. The Zoning Hearing Board may, to encourage conversion of an existing viable building, permit a bonus of not more than 10% impervious coverage above that permitted in Subsection B herein. In allowing any conversion, the Zoning Hearing Board shall attach any reasonable standards it deems appropriate to ensure that said use(s) are developed in a manner consistent with other uses in the district and are compatible with said uses.

Building coverage. Not more than 25% of the area may be covered by buildings, and total impervious coverage shall not exceed 70%.

Yard requirements.

Height. The maximum height of buildings or structures hereinafter erected or enlarged in a Professional and Business Office District shall be 35 feet, not to exceed three stories, exclusive of basements. For any building or structure accessory to a building used for office and/or residential purposes, the maximum height shall be 15 feet.

Maximum building dimension. The greatest dimension of a structure measured parallel to exterior building walls shall be 125 feet. For circular or partially circular buildings, the diameter or assumed diameter shall not exceed 150 feet.

For double-parking bays, 15% of the area of each parking space may be maintained in grass, provided that the grass is separated from the paved area by a suitable wheel stop or bumper.

For parking areas of more than 20 cars, a minimum of 10% of the parking area shall be devoted to interior parking lot landscaping, exclusive of any other landscaping or buffering requirements and exclusive of the grass area permitted under Subsection A herein. The landscaping required individual landscaped area shall contain less than 200 square feet; the minimum horizontal dimension of any such area shall be 10 feet.

The owners of two or more adjacent lots may elect to share common parking facilities according to the following requirements:

Accessways leading onto a public street shall be built to the dimensional requirements specified in § 270-49 of Chapter 270, Subdivision and Land Development.

The spacing of access drives should be 200 feet apart on center, but if lesser spacing is necessary and adequate justification is made for more than one access point, then compliance with § 270-49A(8) of Chapter 270, Subdivision and Land Development, should be demonstrated.