A. 
Application. All buildings or structures shall follow the applicable requirements of §§ 756-3, 756-4 and 756-5.
B. 
Minimum floor areas.
(1) 
One and 1 1/2 stories. The first floor area of a one-story or one-and-one-half-story dwelling shall be not less than 1,200 square feet exclusive of porches, garages, and other outbuildings, except on lots less than 70 feet at the building line, in which case the requirement shall be 1,000 square feet.
(2) 
Two or more stories. The first floor area of a dwelling of two stories or more shall be not less than 1,000 square feet exclusive of porches, garages, and other outbuildings, except on lots less than 70 feet at the building line in which case the requirement shall be 800 square feet.
C. 
Room areas. Room sizes for one- and two-family dwellings shall be equal to or greater than those listed in Table No. 2. Multiple-family buildings shall have room sizes as approved by the municipality.
(1) 
Minimum dimension of living rooms shall be 11 feet, and of kitchens, six feet. Minimum room areas shall not include areas used for storage or closet purposes.
(2) 
Rooms and spaces not herein regulated as to area shall be connected to a living or other habitable room. Rooms and spaces not herein regulated and of areas less than the minimum areas herein required shall not be used for living, dining, sleeping or kitchen purposes.[1]
[1]
Editor's Note: Original § 30.15(2)(c), which immediately followed this subsection, was deleted by Ord. No. 2007-17.
(3) 
No additional dwelling units shall be created or maintained by rearranging room suites, by subdividing rooms or by alterations in any existing building or structure unless such dwelling units have been authorized by permit and comply with this and other applicable regulations.
Table No. 2
Room Areas
Category
Requirement
(square feet)
Minimum Dimension
(feet)
Living room
160
11
Living room with dining space
180
Dining room
80
Kitchen — usable floor area
60
6
Bedroom
100
Other habitable rooms
70
Bathroom
See § 756-15G(3)
D. 
Ceiling heights.
(1) 
Except as otherwise permitted by local requirements, the minimum clear ceiling height of all habitable rooms in one- and two-family homes shall be seven feet six inches. Basement ceiling height shall be a minimum of six feet 10 inches under joists.
(2) 
Sloping roofs may penetrate rooms provided that any portion of any room under a sloping roof having a height of less than five feet shall not be considered as part of the floor area in computing areas or volumes of such rooms. Rooms under a sloping roof shall have a minimum ceiling height of seven feet six inches for not less than half of the required area of the room.
(3) 
Rooms in any building or structure having ceiling heights or areas which do not conform to the regulations of this section shall not be used for human habitation. For ceiling heights of bath and toilet rooms, see Subsection G(3).
E. 
Light and ventilation.
(1) 
Natural light. All habitable rooms shall be provided with natural light by means of glazed openings of at least 8% of the net floor area.
(2) 
Ventilation. Natural or mechanical ventilation shall be provided as follows:
(a) 
Natural ventilation. All habitable rooms, except kitchens and bathrooms, shall be provided with natural ventilation by means of openable exterior doors or windows of at least 3.5% of the net floor area.
(b) 
Mechanical ventilation. Where a mechanical ventilation system is provided in lieu of openable exterior openings providing natural ventilation, the system shall be capable of providing at least one air change per hour. Exhaust ventilation shall terminate outside the building.
(3) 
Cold-side venting. Cold-side venting of insulation shall be provided at roof/attic, flat roof/ceiling and sloping roof/ceiling assemblies. Ventilation shall be provided at the rate of one square foot of free ventilating area for each 300 square feet of area. At least 50% of the vents shall be located at the soffit area.
(4) 
Crawl space venting. Unheated crawl spaces shall be provided with a minimum of two ventilators located at opposite sides of the crawl space.
(5) 
Exhaust fan venting. Exhaust fans are required in all bathrooms which have bathtubs, shower or water closets and in utility rooms, when no openable window is available.
(6) 
Safety glass. Glass in entrance and exit doors, sliding glass doors, storm doors, bathtub enclosures, shower doors and fixed glass panels immediately adjacent to doors shall be safety glass.
F. 
Stairways, landings, platforms and roof decks. Every exit stairway shall not be less than three feet in width and no more than four inches on one side may be used for handrails. Every platform shall be at least as wide as the stairway, measured at right angles, to the direction of travel. Whenever a door opens onto a stairway, a platform shall be provided extending at least the full width of the door in the direction of travel.
(1) 
If stairways are provided in addition to those required by code, such additional stairways need not conform to the width requirements of this chapter.
(2) 
All stairway landings, platforms, roof decks or similar elevations or depressions more than two feet above or below adjacent grade or floor level shall have a guard rail on the open sides thereof, at least 36 inches in height, with an intermediate rail at midheight or vertical rails at 11 inches maximum spacing on center.
(3) 
Stairways on the outside of buildings and an integral part thereof, having more than three risers, shall have a handrail on each side.
NOTE: All exterior doors which swing outwards where there is more than eight inches above grade shall have a platform with minimum dimensions of three feet, supported on a foundation wall or other approved supports to a minimum depth of 48 inches below grade.
(4) 
Risers and treads. All stairways and steps shall have a uniform rise of not more than eight inches and a minimum tread width of nine inches. Risers shall be measured from tread to tread and treads shall be measured from rise to rise. There shall be no more than 18 risers in any one run.
(5) 
The continuous clear head room measured perpendicularly from the nosing shall not be less than six feet eight inches, except for the basement stairways, such head room may be six feet four inches.
(6) 
Winders may be used, provided that such winders are designed so the tread width, 18 inches from the converging end, will not be less than nine inches.
(7) 
Handrails. Handrails, except those serving fire escapes, shall not be less than 30 inches, nor more than 34 inches above the nosing of the treads on stairways or above the surface of ramps.
(8) 
Spiral stairs. Spiral stairs may be used as interior exit stairs. The tread shall measure at least 26 inches from the outer edge of the supporting column to the inner edge of the handrail and at least seven inches in width from nosing to nosing to a point one foot from the narrow end of the tread; provided, however, that each habitable room be provided with an egress window per § SPS 321.03(6), Wis. Adm. Code.
[Added 4-11-1995 by Ord. No. 65-914]
G. 
Toilets, bathrooms and kitchens.
(1) 
In every dwelling, there shall be provided, in each dwelling unit, and connected to a plumbing system, at least one kitchen sink, one water closet, one bathtub or shower and one lavatory.
(2) 
There shall be provided on the premises, for each dwelling unit, means for sanitary disposal of sewage without health hazards or nuisance and in conformity with generally accepted standards.
(3) 
Bathrooms for required toilets, tubs or showers or lavatories shall have a minimum floor area of not less than 12 square feet for each water closet and each tub and 10 square feet for each shower, lavatory or other sanitary plumbing fixture or equipment installed herein. The ceiling height of the required bathroom shall be not less than seven feet. Powder rooms or second baths are not subject to the above but shall have a minimum floor area of 14 square feet with a minimum dimension of three feet in one direction.
(4) 
Each bathroom or toilet room shall be provided with a door. No bathroom or toilet room shall open directly into a kitchen, nor shall such room provide sole access to any habitable room.
(5) 
Bathrooms and toilet rooms shall be provided with means of ventilation as required by this chapter for habitable rooms or positive mechanical ventilation providing one air change every five minutes.
(6) 
All mechanical ventilation shall be ducted directly to the outside. Exception: Exhaust fans with filters may be used without terminating to the outside if approved by the Department of Safety and Professional Services.
H. 
Exits and openings.
(1) 
Exterior stairways, other than to the first floor and basement, shall not be allowed. Every residential home shall have two exits on the first floor. Duplexes shall have two separate stairways or one stairway and an outside porch, not more than 10 feet above the ground.
(2) 
Access to each dwelling unit shall be provided without passing through any part of any other dwelling unit. In dwelling units, every habitable room shall have access to every other habitable room without passing through a bathroom or toilet room.
(3) 
Doors or openings.
(a) 
Exterior doors. The minimum size for at least one main entrance door to a residence shall be three feet wide by six feet eight inches high. The rear or side door shall be two feet eight inches wide by six feet eight inches high.
(b) 
Interior doors. Minimum size door serving as exit from any habitable rooms shall be two feet six inches wide by six feet six inches high. Bathrooms and closets, other than linen and broom closets, can be served by a door a minimum of two feet wide.
(c) 
An opening used without a door shall be the same size as the required minimum size of door.
(4) 
Corridors and hallways between rooms shall be not less than 36 inches wide.
(5) 
Exits, floors, and hallways shall be constructed as specified in § SPS 321.03, Wis. Adm. Code, including such amendments as may be made thereto from time to time in the future.
I. 
Attics, access thereto. In every building and structure having an attic, there shall be provided permanent access thereto by means of a scuttle, disappearing or permanently installed stairway; minimum size opening shall be 24 inches by 20 inches.
J. 
Insulation. Insulation in all buildings or structures and additions thereto shall be installed as required by Chapter SPS 322 of the Wisconsin Uniform Dwelling Code.