In an R1 district, no building or use shall be permitted, except for the following:

Accessory building(s) or structures including one private detached garage.

Child daycare homes.

"Home occupations" as defined in this zoning title.

Planned developments, in accordance with chapter 19 of this title.

Single-family detached dwellings. (Ord. 2640, 5-23-1995)

In an R1 district, special uses may be allowed by the zoning board of appeals in accordance with chapter 18 of this title, as follows:

Group homes.

Public utility services.

Special uses for this district as indicated on the land use chart in chapter 21 of this title. (Ord. 2640, 5-23-1995)

In an R1 district, no more than two and eight-tenths residential units per acre may be erected. (Ord. 2640, 5-23-1995)

In an R1 district, no building may be erected or altered on a lot recorded after the effective date hereof which is less than fifteen thousand five hundred square feet in area and eighty five feet wide throughout its depth; provided, however, that the limitation as to lot area and lot width imposed by this section shall not prohibit the erection of a single-family detached dwelling on a lot shown as such on a recorded plat in the recorder's office of Cook County, Illinois, on November 26, 1967, and containing an area of not less than eight thousand seven hundred twelve square feet, and having a width of not less than fifty feet; and provided further, that the setback regulations herein are complied with. (Ord. 2640, 5-23-1995)

In the R1 district, no building with its accessory buildings or structures shall occupy (cover) more than thirty percent of a lot and the maximum floor area ratio shall not exceed 0.4 for lots less than twenty thousand square feet in area and 0.35 for lots twenty thousand square feet or greater (the resulting maximum gross floor area for lots twenty thousand square feet or greater shall not be less than eight thousand square feet). An accessory building may occupy not more than thirty percent of a rear yard. (Ord. 3235, 4-28-2008)

In the R1 district, a building erected or structurally altered after the effective date hereof shall not exceed thirty five feet in height and shall not exceed two and one-half stories for a lot with a width less than one hundred feet. A building erected or structurally altered after the effective date hereof shall not exceed forty feet in height and shall not exceed two and one-half stories for a lot with a width of one hundred feet or greater.

   A.   Accessory Buildings: An accessory building or structure erected or structurally altered shall not exceed eighteen feet in height or one and one-half stories, whichever is less, and an accessory building shall not include an inhabitable second floor.

   B.   Exceptions: Any building or accessory building erected or structurally altered prior to the effective date hereof which is damaged by fire, explosion or act of God may be restored or reconstructed to its height prior to said occurrence. The burden of proving what the height of a building was prior to the damage rests solely on the person invoking this provision. (Ord. 3105, 3-28-2005)

In an R1 district, buildings shall be set back from every lot line to provide an open yard in accordance with the following regulations. Every yard shall be unobstructed from ground level to sky except as allowed in subsection 10-20-2A of this title.

   A.   Front Yard: The required front yard setback shall be calculated as the average of the existing front yard setbacks as measured from the front lot line to the principal structure along the same side of the street and on the same block. The shortest and longest setbacks along the same side of the same block shall be eliminated in the making of the computation.

      1.   Through Lots: Shall provide the required front yard on both streets.

      2.   Corner Lots: Shall have its required front yard on the lot's primary street; such street being the street which has the greatest distance between the two cross streets forming the block frontage. On the secondary street the front yard shall be a minimum of thirteen feet for a fifty foot wide lot, however the secondary street's front yard shall be increased by two feet for each five foot increase in lot width (or portion thereof) to a maximum secondary front yard depth of twenty five feet, and provided further that no accessory building on a corner lot shall project beyond that front yard line established for each street.

      3.   Front Porches: All front porches built or modified after the effective date of this section shall comply with the following standards:

         a.   Maximum Encroachment Into Setbacks: A front porch shall not extend into a front yard more than eleven feet for a building having a front yard deeper than fifty feet. Where the front yard is fifty feet or less in depth, such front porch shall not extend into the front yard more than ten feet or twenty percent of the depth of the front yard, whichever is less.

         b.   Size Of Porch: A front porch that encroaches into a front yard shall have a minimum surface deck area of fifty square feet. The total area of any encroachment of the porch into a front yard shall not exceed three hundred square feet. In the case of a porch intended to wrap around to the side of a residence (including a porch that would encroach into the required setback of a secondary front yard), the side portion of the porch shall not exceed one hundred twenty five square feet and shall conform to all other requirements of this section.

         c.   Depth Of Porch: The minimum depth of the porch shall not be less than five feet and the maximum depth of the porch shall not exceed twelve and one-half feet.

         d.   Enclosure Prohibited: Other than by a roof, the front porch shall be open and shall not be enclosed by any materials, including, without limitation, glass or screens.

         e.   Railings: A railing not exceeding forty two inches in height measured from the floor of the porch may be provided on the periphery of the front porch.

         f.   Noninhabitable Space: A front porch shall not have any deck, flooring, or inhabitable space above the first floor level.

         g.   Modification Of Existing Porches: An existing front porch that encroaches into a front yard or a secondary front yard may be modified in compliance with the standards in this section.

         h.   Previously Enclosed Porches: Dwelling units with existing porches that have previously been enclosed and which encroach into a front yard or a secondary front yard shall not be eligible for porches permitted by this subsection.

         i.   Front Porch Shall Not Affect The Average Allowable Setback: Front porches shall not be included in calculating the average front yard setback.

   B.   Rear Yard: A rear yard shall have a depth of not less than fifteen percent of the depth of the lot or twenty six feet two inches, whichever is greater. Provided, however, that accessory buildings may be constructed within the rear yard but no closer than three feet from any lot line.

   C.   Side Yards:

      1.   Requirements: The required minimum side yard setback shall be ten percent of the lot width or five feet, whichever is greater, and the minimum required combined side yard setback shall be twenty five percent of the lot width, or ten feet, whichever is greater as measured to the exterior wall of the structure. (Ord. 3460, 10-8-2012)

      2.   Exceptions:

         a.   Eaves: The eaves of a structure shall be required to maintain a minimum three foot side yard setback. The eave of an addition, where the eave of the existing structure does not meet this standard, may be constructed with a side yard equal to the existing nonconforming side yard of that eave. (Ord. 3743, 4-22-2019)

         b.   Additions: An addition to an existing structure that does not meet this standard must maintain either a three foot side yard or a side yard that is the same width as the current side yard, whichever is wider. A nonconforming wall built along a nonconforming side yard may be extended an additional twenty feet as of right into the nonconforming side yard, and the height of a wall that maintains a nonconforming side yard setback may not be increased.

         c.   Accessory Structures: An accessory structure may be constructed with a side yard of no less than three feet, provided that the entire accessory structure is within the rear thirty percent of the subject lot (as measured from the front property line to the rear property line). The eaves of a detached accessory structure shall be permitted to encroach a maximum of one foot into a required yard setback.

         d.   Standards: The standards set forth in this section shall be applied separately to each side yard of an existing or proposed structure or addition.

   D.   Attached Front Garage Projection: Attached front garages can project a maximum of twelve feet in front of the primary front plane elevation (as illustrated below) on lots with a width of sixty feet or less.

(Ord. 3460, 10-8-2012)

In an R1 District, no building may be erected unless there shall be provided two enclosed parking spaces for passenger automobiles which are not in any of the required open yards unless such enclosure is a detached garage, which may occupy no more than thirty percent of the rear yard.

   A.   Driveways: All driveways and places where vehicles stand shall be paved with concrete, asphalt or paving bricks.

   B.   Other Vehicles: No outdoor parking or storage of a recreational vehicle, boat or any trailer is permitted in a front or side yard, however, a recreational vehicle or boat may be parked in a paved portion of a rear yard provided such area is a minimum of five feet from the rear and side lot lines and twenty feet from the rear of the primary building, provided further, that no such vehicle(s) shall be visible from the street.

      1.   A recreational vehicle may not be parked on a driveway between the hours of one o'clock A.M. and six o'clock A.M. and then only for the remaining nineteen hours of one day, for the purpose of loading and unloading the vehicle.

      2.   At no time shall a parked or stored recreational vehicle, boat or trailer be occupied or used for habitation.

      3.   Any recreational vehicle, boat or any trailer which is parked in the rear yard of a corner lot shall be screened so as not to be visible from the street.

      4.   No truck or commercial vehicle shall be parked on a lot except in an enclosed garage, unless temporarily parked for the purpose of a delivery or service. (Ord. 2640, 5-23-1995)