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Rock Island County Unincorporated
City Zoning Code

ADDITIONAL REQUIREMENTS

EXCEPTIONS, MODIFICATIONS

§ 154.070 HEIGHT LIMITS.

   Height limitations stipulated elsewhere in this chapter shall not apply:
   (A)   To barns, silos, or other farm buildings, provided these are not less than 50 feet from every lot line, to church spires, belfries, cupolas and domes, monuments, water towers, fire and hose towers, masts, and aerials; to parapet walls extending not more than four feet above the limiting height of the building. However, if, in the opinion of the Building Inspector, such structures would adversely affect adjoining or adjacent properties, such greater height shall not be authorized except by the Zoning Board of Appeals.
   (B)   To places of public assembly such as churches, schools, and other permitted public and semi-public buildings not to exceed six stories or 75 feet, provided that for each foot by which the height of such building exceeds the maximum height otherwise permitted in the district, its side and rear yards shall be increased in width or depth by an additional foot over the side and rear yards required for the highest building otherwise permitted in the district.
   (C)   To bulkheads, conveyors, derricks, elevators, penthouses, water tanks, monitors, and scenery lofts; to monuments, fire towers, hose towers, cooling towers, grain elevators, gas holders, or other structures, where the manufacturing process requires a greater height. Where a permitted use for the highest building otherwise is permitted in the district.
   (D)   To hospitals, provided that for each foot by which the height of such building exceeds the maximum height otherwise permitted in the district, its side and rear yards shall be increased in width and depth by an additional one-half foot over the side and rear yards required for the highest building otherwise permitted in the district.
(Ord. passed 5-16-2023)

§ 154.071 LOT AREA REQUIREMENTS.

   (A)   Existing lots of record. In any district where dwellings are permitted, a one-family detached dwelling may be constructed on any lot of official record at the time of enactment of this chapter, provided that proposed yard spaces satisfy requirements stipulated for the district in which said lot is located, or requirements as may be modified by the Zoning Board of Appeals.
   (B)   Lots unserved by sewer and water. In any district where neither public water supply nor public sanitary sewer is accessible, the otherwise specified lot area and width requirement shall be 20,000 square feet and 100 feet, respectively, provided however, that where a public water supply system is accessible and will be installed, these requirements shall be 10,000 square feet and 75 feet respectively, provided further, that the Health Officer has certified that the said areas will be large enough to satisfy all applicable requirements concerning water supply and the disposal of sanitary wastes.
(Ord. passed 5-16-2023)

§ 154.072 LOT AREA PER FAMILY.

   (A)   Where part or all of the off-street parking spaces required for dwelling are provided within the principle building, the minimum lot area per dwelling unit specified may be reduced by a maximum of 20%.
   (B)   Division (A) above shall be in accordance with the following formula: a/b x 20%, where:
      (1)   “a” is the number of spaces provided within the principle building; and
      (2)   “b” is the number of spaces required for the dwellings.
(Ord. passed 5-16-2023)

§ 154.073 FRONT YARD EXCEPTIONS, MODIFICATIONS.

   (A)   Front yard requirements do not apply to bay windows or balconies occupying, in the aggregate, not more than one-third of the front wall, provided that these projections come entirely within planes drawn from either main corner of the front wall, making the interior angle of 22 and one-half degrees in the horizontal planes with the front wall; to chimneys, flues, belt courses, leaders, sills, pilasters, uncovered porches, or similar features not over three feet high above the average finished grand and distant five feet from every lot line.
   (B)   Interior lots in any district where the average depth of two or more existing front yards on lots within 150 feet in either direction of the lot in question and within the same block front less than the average depth of said existing front yards or the average depth on the two lots immediately adjoining, provided, however, that the depth of a front yard in any R District shall be at least ten feet and need not exceed 30 feet.
   (C)   Corner lots. In any district where the average depth of two or more existing front yards on lots within 150 feet of the lot in question and within the same front is less than the least front yard described, the depth of the front yard on such lot shall not be less than the average depth of said existing front yards or depth of the front yard on the lot immediately adjoining; provided, however, that the depth of a front yard on a lot in any R District shall be at least ten feet and need not exceed 30 feet, except as provided in § 154.045.
(Ord. passed 5-16-2023)

§ 154.074 SIDE YARD EXCEPTIONS, MODIFICATIONS.

   (A)   Along any district boundary line, an abutting side yard on a lot in the less restricted district shall have at least a width equal to that required in the more restricted district; and in a B-2 or I District, on a lot abutting a lot in any R District, such side yard for a building higher than the limiting height in such R District shall be increased by three feet for each story over such limiting height.
   (B)   Side yards shall be increased in width by two inches for each foot by which the length of the side wall of the building, adjacent to the side yard, exceeds 40 feet in any R-1 or R-2 District, or 50 feet in any R-3 District.
   (C)   Side yards may be reduced by three inches from the otherwise required least width or sum of the least widths for each foot by which a lot of record, at the time of enactment of this chapter, is narrower than the lot width specified for the district in which the lot is located in the case of buildings not higher than two and one-half stories, and in case the owner of record does not own any adjoining property; provided, however, that no side yard shall be narrower at any point than three feet.
   (D)   No part of any accessory building shall be nearer a side street lot line than the least depth of any front yard required along such side street.
   (E)   Side yards may be varied where the side walls of a building are not parallel with the side lot line or is broken or otherwise irregular, in which case the average width, or narrower than three feet in any case.
   (F)   (1)   Structures or projections into side yards may be permitted as follows:
         (a)   Fences, plantings, or walls not over six feet above the average natural grade;
         (b)   Fire escapes three feet from a side lot line; and
         (c)   Bays and balconies not more than three feet from the building, provided these projections are entirely within planes drawn from either main corner of the side wall, making an interior angle of 22 and one-half degrees in the horizontal plane with the side wall.
      (2)   The sum of the lengths of such projection shall not exceed one-third of the length of the side yard.
   (G)   Chimneys, flues, belt courses, leaders, sill, pilasters, lintels, ornamental features, cornices, eaves, gutters, and the like into or over a required side yard not more than one and one-half feet.
   (H)   Terraces, steps, uncovered porches, stoops or similar features not higher than the elevation of the ground story of the building and distant three feet from a side lot line.
(Ord. passed 5-16-2023)

§ 154.075 REAR YARD EXCEPTIONS, MODIFICATIONS.

   (A)   Rear yards may be reduced by three inches from the required least depth for each foot by which a lot at the time of enactment of this chapter is less than 100 feet deep, in the case of a building not higher than two and one-half stories, and in the case the owner of record does not own adjoining property to the rear, provided, however, that no required rear yard shall be less than ten feet deep.
   (B)   (1)   Structures or projections into rear yards may be permitted as follows:
         (a)   Fences, plantings, or walls not over six feet above the average natural grade;
         (b)   Fire escapes six feet from the building; and
         (c)   Bays and balconies not more than three feet from the building, provided these projections are entirely within the planes drawn from either main corner of the rear wall, making an interior angle of 22 and one-half degrees in the horizontal plane with the rear wall.
      (2)   The sum of the lengths of such projections shall not exceed one-half of the width of the rear wall.
   (C)   Chimneys, flues, belt courses, leaders, sills, pilaster lintels, ornamental features, cornices, eaves, gutters and the like, into or over a required rear yard not more than one and one-half feet.
   (D)   Terraces, steps, uncovered porches, or similar features not more than ten feet into a required rear yard, nor:
      (1)   Closer than six feet of an alley;
      (2)   Within ten feet of a rear lot line nor an alley lot line; or
      (3)   Within six feet of an accessory building.
(Ord. passed 5-16-2023)

§ 154.076 SUPPLEMENTAL YARD REQUIREMENTS.

   (A)   When 40% or more of the frontage on the same side of the street is improved with buildings that have a front yard that is greater or less than the required front yard in the district, a building may project to the average front yard so established.
   (B)   (1)   Whenever a lot of record has an average width that is 20% or more less that the minimum average width required in the district in which it is located, the width of the side yards may be reduced to 10% of the average width of the lot.
      (2)   No side yard shall be less than three feet in width unless authorized by the Zoning Board of Appeals.
   (C)   The required front yard setbacks on corner lots shall be provided on both streets where a lot is located at the intersection of two or more streets.
   (D)   On double frontage lots, the required front yard shall be provided on each street.
   (E)   (1)   Temporary structures that are used in conjunction with construction work only may be permitted in any district during the period that the construction work is in progress.
      (2)   Such temporary structures shall be removed upon completion of the construction work.
      (3)   This temporary structure shall not be used as a dwelling.
   (F)   Exterior storage of goods, materials, or equipment shall not be permitted in any AG-1, AG-2,
SE-1, SE-2, or R Districts, or any other district except as explicitly authorized by this chapter.
(Ord. passed 5-16-2023)