For the purpose of this chapter, the following words and phrases shall have the meanings assigned to them in this section, unless already defined in Ch. SPS 320, Wis. Adm. Code. Words and phrases not herein otherwise defined shall have the meanings accepted by common usage.
ACCESSORY BUILDING
A part of a principal building, or a supplemental building located on the same lot with a principal building and generally used for storage, private garage, or other use customarily incident to a residence use.
ADDITION
Any new construction whereby an existing building or structure, or building or structure in course of construction, is increased in area or cubical content.
ADJOINING LOT LINE
The line between adjoining lots, plots of land, or parcels of land of different or same ownership.
ALLEY
A right-of-way which affords a secondary means of vehicular access to abutting properties. A street shall not be considered an alley.
ALTERATION
Any change or modification in construction or occupancy.
APARTMENT
A room or suite of rooms which is occupied or which is intended or designed to be occupied by one family for living and sleeping purposes.
APPROVED
As to materials and types of construction, refers to approval by the state or a licensed building engineer as the result of investigation and tests conducted by said association or by reason of accepted principles or tests conducted by said association or by reason of accepted principles or tests by national authorities or technical or scientific organizations.
AREA
As applied to dimensions, the maximum horizontal projected area of a building, structure, room, apartment or open space, not including overhangs.
BEARING
That area of any structural unit of a building or structure which is in direct contact with the supports which receive the loads from that unit.
BUILDING
Any structure built for the support, shelter or enclosure of persons, animals, chattels, or property of any kind.
BUILDING INSPECTOR
The officer charged with the administration and enforcement of this chapter or his regularly authorized deputy. Same for "building official."
BUILDING, EXISTING
A building erected prior to the adoption of this chapter or one for which a legal building permit has been issued.
CITY
Any political subdivision which adopts this chapter for regulation within its jurisdiction.
CUBIC CONTENTS
The actual cubic space enclosed within the outer surfaces of the outside or enclosed walls, outer surfaces of the roof and the finished surfaces of the lowest floors of a building or structure. Does not include the contents of courts that are open to the sky.
DWELLING
A building which is designed or used or which is intended to be used as a residence or place of abode.
EQUIPMENT
As specifically regulated by this chapter, includes heating, cooling, air-conditioning, and ventilating systems; plumbing and sanitary systems; electric light and power systems; telephone, electronic and radio signal and annunciator systems; dry cleaning, dyeing and washing machines; elevators and dumbwaiters; gas pipe systems; standpipes; sprinkler systems; fire protection apparatus, fire extinguishers, and pumps; oil burners, stokers, and conveyors; refrigerating systems; devices, machinery and apparatus of every description; furnaces, boilers, high- or low-pressure steam systems; gasoline pumps; all movable or portable containers of every description; all air pressure or other tanks; and all other self-contained systems used in conjunction with buildings or structures.
ESTABLISHED GRADE
The grade of the street, as established by ordinance, at the center line of the street.
EXISTING
A building, structure, equipment, or premises completed or in course of construction, or used or occupied, and for which a legal permit has been issued prior to the effective date of this chapter.
FLOOR AREA
The net area of any floor space enclosed by exterior walls, firewalls, or absolute fire separation, exclusive of open spaces.
FOOTINGS
That portion of the foundation of a structure that spreads and transmits loads directly to the soil or the piles.
LINTEL
The beam or girder placed over an opening in a wall that supports the wall construction above.
LOT
A parcel of land in a single ownership occupied or to be occupied by not more than one principal or main building and the accessory buildings or uses customarily incident to it, including such open spaces as are required by this or other codes, and having its principal frontage upon a street.
LOT LINE
A line or lines dividing one lot; plot of land, or parcel of land from an adjoining lot, plot of land, or parcel of land.
NONCONFORMING BUILDING, ETC.
A lawfully existing building (premises, structure, use, materials, or equipment), which does not conform to the requirements of this chapter.
OCCUPANCY or USE
The purpose for which a building, structure, equipment, materials or premises or part thereof is used or intended to be used as regulated by this chapter.
PERSON
Any individual, persons, partnerships, firm, organization, association or corporation, their agents, heirs or assigns.
PRINCIPAL BUILDING
A single main building or structure on a lot for specific use or occupancies.
REQUIRED
Mandatory by provisions of this chapter.
ROOM
A space within a building or structure completely enclosed with walls, partitions, floor, and ceiling, except for necessary openings for light, ventilation, ingress and egress.
SHALL
As used herein, is mandatory; same for "must."
SQUARE FOOTAGE OF BUILDING
The actual area in square feet enclosed by the exterior perimeter of the building walls on each separate floor level.
STAIRWAY
Three or more risers shall constitute a stairway.
STORY
The space in a building included between the surface of any floor and the surface of the next above or below or roof next above.
STRUCTURE
As specifically regulated by this chapter, anything which is constructed, erected, and framed of component parts and which is fastened, anchored, or rests on a permanent foundation or on the ground for any occupancy or use whatsoever, excluding fencing.
UNUSUAL CONSTRUCTION
Any construction methods or materials not covered in this chapter.
WALLS
Walls shall be defined as follows:
A. 
BEARING WALLA wall which supports any load in addition to its own weight.
B. 
CAVITY WALLWall built of masonry units or of plain concrete, or a combination of these materials, so arranged as to provide an air space within the wall and in which the facing and backing (inner and outer parts) of the wall are tied together with metal ties.
C. 
CURTAIN WALLA nonbearing wall between columns or piers.
D. 
EXTERIOR WALLAn outer enclosing wall of a building or structure.
E. 
FACED WALLA wall in which the masonry facing and backing are so bonded as to exert common action under load.
F. 
NONBEARING WALLA wall that supports no load other than its own weight.
G. 
PANEL WALLA nonbearing wall in skeleton construction, built between columns or piers and wholly supported at each story.
H. 
PARTITIONAn interior vertical structure usually of light construction serving to enclose an area, room, space, or division, extended from floor to ceiling, and having wall surfaces of approved materials as permitted by this chapter.
I. 
RETAINING WALLWall used to resist laterally imposed pressures.
J. 
VENEERED WALLWall having masonry facing which is attached to the backing but not so bonded as to exert common action under load; also having outer facing for the purpose of providing ornamentation, protection, or insulation.