A. 
Buildings and parts thereof shall be maintained so as to be capable of sustaining safely their own weight and the loads to which they may be subject.
B. 
Buildings shall be maintained so that loads are transmitted to the soil without undue differential settlement, unsafe deformation or movement of the building or any structural part.
C. 
Buildings shall be maintained so that protection is provided for all structural members which may become structurally unsound if left unprotected. Causes of such deterioration include, among others, action of freezing and thawing, dampness, corrosion, wetting and drying and termites or other destructive insects.
D. 
Buildings built in soil which is water-bearing at any season of the year shall be maintained so that ground- and surface water will not penetrate into habitable spaces.
A. 
Foundation walls.
(1) 
The foundation walls of every building or structure shall be maintained in good repair and be structurally sound.
(2) 
Foundation walls shall be considered in good repair and structurally sound if found free from damage or defects and capable of bearing imposed loads.
B. 
Stairs, porches, railings, entrance platforms and fire escapes.
(1) 
The stairs, porches, railings, entrance platforms and fire escapes affixed to the exterior of every structure shall be maintained in good repair and structurally sound.
(2) 
Stairs, porches, railings, entrance platforms and fire escapes shall be considered to be in good repair and structurally sound when found to be free of holes, cracks and rust, capable of supporting imposed loads and in a safe, operable condition.
C. 
Weather- and watertight.
(1) 
Every structure shall be so maintained that it will be weather- and watertight.
(2) 
Exterior walls, roof and all openings around doors, windows, chimneys and all other parts of the structure shall be so maintained as to keep water from entering the structure and to prevent undue heat loss. Damaged materials must be repaired or replaced. All parts of the structure that show evidence of wet/dry rot or other deterioration shall be repaired or replaced and refinished. Such replacements, wherever practical, shall be in conformity with the remainder of the structure.
D. 
Protective coating for wood surfaces. All exterior wood surfaces of a structure or building that are not of a species inherently resistant to decay shall be treated when necessary with a protective coating or other preservative applied to it and must be maintained to prevent deterioration.
E. 
Overhanging objects.
(1) 
Every structure or building shall be free from loose overhanging objects.
(2) 
Exterior walls, roofs and all other parts of the structure shall be free from loose and unsecured objects and materials. Such objects or materials shall be removed, repaired or replaced.
F. 
Exterior lighting. Exterior lighting shall be maintained in operating condition.
A. 
Free from dampness.
(1) 
Cellars, basements and crawl spaces in every structure or building shall be reasonably free from dampness to prevent conditions conducive to decay or deterioration of the structure.
(2) 
Ventilation shall be provided in every basement, cellar, crawl space and attic by means of windows, openings or vents or mechanical vents in accordance with generally accepted standards.
B. 
Structural members.
(1) 
Supporting structural members of every structure or building shall be structurally sound.
(2) 
Supporting structural members shall be considered to be structurally sound if such members are capable of bearing imposed dead and live loads safely and if there is no evidence of deterioration.
C. 
Chimneys, flues and vents. (See also § 475-37.)
(1) 
Chimneys and all flue and vent attachments thereto and all other flues and vents of every structure or building shall be structurally sound and free from defects to assure the performance of the function for which they were designed and are used.
(2) 
Chimneys, flues, gas vents or other draft-producing equipment shall provide sufficient draft to develop the rated output of the connected equipment. Chimneys and flue linings, where required, flues, gas vents and their supports shall be structurally safe, durable, smoketight and capable of withstanding the action of the flue gases.
D. 
Stairs and railings.
(1) 
Interior stairs of every building or structure shall be structurally sound and free from defects. Railings shall be provided in accordance with generally accepted standards for stairs, balconies, landings and stairwells.
(2) 
Treads or risers that evidence excessive wear or are broken, warped or loose shall be repaired. Stairs shall be securely fastened to supporting structural members and be capable of supporting normally imposed loads. Properly balustraded railings, capable of bearing normally imposed loads, shall be placed on the open portions of stars, balconies, landings and stairwells.
E. 
Floors, walls and ceilings.
(1) 
Floors, walls and ceilings of every building or structure shall be structurally sound and maintained free from deterioration in a clean and sanitary condition.
(2) 
Floors shall be considered to be structurally sound where capable of safely bearing imposed loads. Walls and ceilings shall be considered to be structurally sound and in good repair when clean, free from breaks, loose plaster and similar conditions.
F. 
Doors. Door(s) shall be structurally sound, free from openings, deterioration and with approved hardware.