In addition to the specific requirements and recommendations contained in Square Guidelines for the applicable coordinated planning area, the Standards set forth in this subpart C are uniformly applicable to any development within the Development Area.

Development must maintain a uniformly high standard of architecture, representative of the best contemporary design and planning concepts. Great care and sensitivity must be shown in the architectural treatment of new buildings, particularly in terms of massing, facade design (including materials, composition, and detailing), the ground floor and sidewalk pedestrian environment, interior public spaces, and provisions for pedestrian and vehicular access. Special design considerations for each coordinated planning area are set forth in Square Guidelines.

Rehabilitation of buildings within the Development Area, which, according to the Plan and the Historic Preservation Plan of the Corporation, are specified for preservation, shall be acomplished (a) in accordance with the Secretary of the Interior's “Standards for Historic Preservation Projects”: (36 CFR part 68), and (b) consultation with the State Historic Preservation Officer for the District of Columbia.

(a) Off-street parking as a principal use is prohibited, although off-street parking as an accessory use in a development (such as a below-grade parking garage) is permitted.

(b) All parking spaces shall be located below grade level.

(c) The minimum number of parking spaces shall be provided in accordance with DC Zoning Regulations.

(d) The maximum number of parking spaces permitted by PADC for a development may not exceed the aggregate of the number of spaces allowed for each use within the development. The schedule of limitations for parking spaces is as follows:

(1) Hotel: One parking space for each four sleeping rooms or suites;

(2) Places of public assemblage other than hotels: (i.e., arena, armory, theater, auditorium, community center, convention center, concert hall, etc.) one parking space for each ten seats of occupancy capacity for the first 10,000 seats plus one for each 20 seats above 10,000: Provided, that where seats are not fixed, each seven square feet of gross floor area usable for seating shall be considered one seat;

(3) Retail, trade, and service establishments: one parking space for each 750 square feet of gross floor area;

(4) Residential: One parking space for each 1.2 units;

(5) Offices: One parking space for each 1,800 square feet of gross floor area.

(a) Every development shall incorporate features which will make the development accessible by the physically handicapped. The standards in the “American Standard Specifications for Making Buildings and Facilities Accessible to, and Usable by the Physically Handicapped,” published by the American National Standards Institute, Inc. (ANSI A 117.1-1961 (1971)), are recommended.

(b) Where a development includes a historic structure, the Advisory Council on Historic Preservation's policy, “Supplementary Guidance—Handicapped Access to Historic Properties,” (45 FR 9757, Feb. 13, 1980), should be observed.

Fine arts, including sculpture, paintings, decorative windows, bas-reliefs, ornamental fountains, murals, tapestries, and the like, should be included in each development. PADC encourages commissions for original works of art which are appropriate for the development. For information and guidance, a reasonable expenditure for fine arts is deemed to be one half of one percent of the total construction cost of the development.

All new development shall be designed to be economical in energy consumption. The Energy Guidelines of the Corporation, and the District of Columbia Energy Conservation Code Act of 1979 and its implementing regulations set forth the appropriate standards to be observed.

As a complementary action to satisfying required District of Columbia codes related to fire safety, it is highly recommended that all new development be guided by standards of the NFPA Codes for fire and life safety and that all buildings be equipped with an approved sprinkler system.

Exterior illumination of a building shall be in conformance with the standards specified in the Pennsylvania Avenue Lighting Plan of the Corporation.