Chapter 29 ZONING*
Section 29-26 Height and area exceptions.
The regulations and requirements as to height of buildings
and area of lot which may be
occupied by buildings, side yards, front yards and rear yards; and other regulations and
requirements as established in the sections of this chapter, shall be subject to the following
exceptions and additional regulations:
(1) a. In districts R-1, R-2 and R-3,
where public or semi-public buildings, such as schools,
museums, libraries, public administration buildings, etc., either public or private, are permitted,
such buildings may be erected to a height not exceeding seventy-five (75) feet, unless a greater
height is allowed, provided that such buildings shall be set back one additional foot on all sides
for each additional foot that such buildings exceed the specified height limits as established by
the regulations of the district in which such building is situated.
b. In the
R-3 district only, schools may be constructed to a height of one hundred (100)
feet without additional setback requirements.
(2) Dwellings in districts R-1 and
R-2 may be increased in height, not exceeding ten (10)
feet, in addition to the limitation prescribed in such districts, provided that two (2) side yards of
not less than fifteen (15) feet in width each, are provided.
(3) Parapet walls, false mansards,
flagpoles, chimneys, finial cooling towers, elevator
bulkheads, penthouses, stacks, cupolas, antennas (as defined in section 29-21.3) and spires shall
not extend more than six (6) feet above the height limit.
(4) On through lots one hundred twenty-five
(125) feet or less in depth, the height of a
building may be measured from the curb elevation of either street. On through lots of more than
one hundred twenty-five (125) feet in depth, the greater height shall apply to a depth of not more
than one hundred twenty-five (125) feet from the higher street.
(5) In district A-1, such items as
silos, windmills, barns, and other structures normally
associated with agricultural use of the land, may not exceed seventy-five (75) feet in height.
(6) In districts R-1, R-2 and R-3,
private noncommercial radio and television antennae may
be permitted to be constructed to a height in excess of thirty-five (35) feet, but none shall be
greater than forty-five (45) feet in height. Such antennae shall not be located in the front yard
area of any lot, and shall be in compliance with all applicable laws and ordinances of the city.
(1) In districts R-1, R-2, R-3 and
R-4, where lots composing forty percent (40%) or more of
the frontage, on the same side of a street between two (2) intersecting streets (excluding reverse
corner lots), are developed with buildings, the median of the front yards of such buildings shall
establish the minimum front yard depth for the entire frontage. Where a recorded plat has been
filed showing a setback line which otherwise complies with the requirements of this chapter, yet
is less than the established setback for the block as provided above, such setback line shall apply.
(2) Where an official plan line has
been established for future widening or opening of a
street upon which a lot abuts, the depth or width of a yard shall be measured from such official
plan line to the nearest line of the building.
(3) Every part of a required yard
or court shall be open from its lowest point to the sky,
unobstructed except for the ordinary projection of sills, belt courses, cornices, chimneys,
buttresses, solar energy systems, ornamental features, and eaves. None of the above projections
shall extend into a court more than six (6) inches nor into a minimum yard more than twenty-four
(24) inches; and provided further, that canopies or open porches having a roof area not exceeding
sixty (60) square feet may project a maximum of six (6) feet into the required front yard. Open
paved terraces may project not more than ten (10) feet into a front or rear yard, and existing open
porches extending into a required yard shall not be enclosed.
(4) An open fire escape may project
into a required side yard, but not more than half the
width of such yard, and not more than four (4) feet from the building. Fire escapes, solid floored
balconies, and enclosed outside stairways may project not more than four (4) feet into a rear
(5) A terrace garage in a district
R-1 to R-3 inclusive, may be located in a front or side yard,
provided that it is completely recessed into the terrace, and that the height of the terrace is
sufficient to cover and conceal the structure from above, and further that the doors, when open,
shall not project beyond any property line, and that the structure be set back at least four (4) feet
from the front property line.
(6) In any residential district, a
detached accessory building shall not:
twenty-four (24) feet in height;
b. Be higher
than the main building; or
more than thirty (30) per cent of a rear yard.
A detached accessory building may
be connected with the main building by a lightly
constructed, covered passage, open on each side, not more than six (6) feet wide inside, the roof
of which is not more than twelve (12) feet high at its highest point, and is not an extension of the
roof of the main building.
(7) No rear yard shall be required
in any nonresidential district on any lot of which the rear
line adjoins a railway right-of-way or which has a rear railway track connection.
(8) In computing the depth of a rear
yard for any building where such yard abuts an alley,
one-half of such alley may be assumed to be a portion of the rear yard.
(9) Buildings constructed on the campus
of an institution of higher learning, and which
buildings have been included as part of a development plan approved by the council, need not
comply with the yard requirements of the district in which they are located, but shall comply with
the following requirements:
distance to a street line--twenty-five (25) feet, except that where there is a
building existing at the time of the passage of this section, with less than a twenty-foot setback
on the same side of the street and within one hundred (100) feet on either side of the proposed
building, such building may be located not less than twenty (20) feet from the street line.
distance to a property line other than a street--fifteen (15) feet for buildings
thirty-five (35) feet in height, and five (5) additional feet for each additional ten (10) feet in
(c) Balcony projections over property
lines in district C-2:
(1) In district C-2, balconies on
new, renovated or retrofitted construction may project into
the public right-of-way only if:
a. The improvement complies with section
24-2(c) of this code; and
b. The balcony projects only over
a public sidewalk or an alley, provided that such
projection does not cause a disruption to any city service or maintenance of the underlying public
improvements. No balcony shall project over the travel lanes of any public street; and
c. The maximum projection and minimum
height above the public sidewalk shall be
governed by the Building Code of Columbia, Missouri, adopted in chapter 6 of this code; and
d. The proposed
balcony meets all applicable design standards contained in this code and
other ordinances passed by the city council.
(Code 1964, § 19.210; Ord. No. 9958, § 1, 10-3-83; Ord. No. 15471, §
1, 1-5-98; Ord. No. 20284,
§ 3, 6-1-09; Ord. No. 21791, § 1, 9-3-13)
(Ord. 21791, Amended, 09/03/2013, Prior Text; Ord. 20284, Amended, 06/01/2009, Prior Text; 15471, Amended, 01/05/1998, Prior Text)