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Lisle City Zoning Code

CHAPTER 16

ARCHITECTURAL DESIGN STANDARDS

5-16-1: PURPOSES:

This regulations of this Chapter are intended to:
   (A)   Establish architectural design standards for development within the Village;
   (B)   Improve the overall quality of development in the Village;
   (C)   Ensure the compatibility of development with surrounding land uses;
   (D)   Provide for architectural variety;
   (E)   Establish quantifiable design standards;
   (F)   Provide greater certainty about project design expectations;
   (G)   Establish non-monotonous detached house design; and
   (H)   Guide the development review and entitlement process by clearly stating the Village’s desires for quality development. (Ord. 2021-4931, 11-15-2021)

5-16-2: RESIDENTIAL ARCHITECTURAL DESIGN STANDARDS:

   (A)   Applicability
      1.   The residential architectural design standards of this Section apply to the construction of a new principal building containing uses classified in the residential use category, as defined in Chapter 7 of this Ordinance.
         (a)   Exception: Multi-unit buildings, as defined in Chapter 7 of this Ordinance are subject to the nonresidential architectural design standards of this Chapter.
   (B)   Standards
      1.   Architectural Design Elements
         (a)   A minimum of five of the following architectural design elements shall be incorporated in the street facing façade(s) of detached houses, duplexes, townhouses, multi-unit, and group living facilities. Duplexes and townhouses shall contain a minimum of five of the following architectural design elements in the street facing façade(s) of each dwelling unit.
            (1)   Wing walls
            (2)   Balconies
            (3)   Bay or oriel windows
            (4)   Dormers
            (5)   Covered front porch
            (6)   Shutters
            (7)   Columns
            (8)   Cupola
            (9)   Ornamental brackets, trusses, or rafters
            (10)   Arbor / trellis
            (11)   Portico
            (12)   Ornate chimney pots
            (13)   Window planting boxes
            (14)   Decorative gable vents
            (15)   Doorway pediment
            (16)   Stone accents
            (17)   Quoins
            (18)   Brick solider coursing and other similar details
            (19)   Decorative trim boards located at outside corners, inside corners, and at transitions to masonry elements
            (20)   Exterior window molding
            (21)   Similar architectural design elements approved by the Zoning Administrator
         (b)   A minimum of one of the following architectural design elements shall be incorporated in all non-street facing facades. Duplexes and townhouses shall contain a minimum of one of the following architectural design elements in all non-street facing facades of each dwelling unit.
            (1)   Wing walls
            (2)   Balconies
            (3)   Bay or oriel windows
            (4)   Dormers
            (5)   Covered porch
            (6)   Shutters
            (7)   Columns
            (8)   Cupola
            (9)   Ornamental brackets, trusses, or rafters
            (10)   Arbor / trellis
            (11)   Portico
            (12)   Ornate chimney pots
            (13)   Window planting boxes
            (14)   Decorative gable vents
            (15)   Doorway pediment
            (16)   Stone accents
            (17)   Quoins
            (18)   Brick solider coursing and other similar details
            (19)   Decorative trim boards located at outside corners, inside corners, and at transitions to masonry elements
            (20)   Exterior window molding
            (21)   Similar architectural design elements approved by the Zoning Administrator
      2.   Building Material
         (a)   Face brick or stone shall be provided on not less than 50% of the exterior wall area, not including windows and doors.
            (1)    Exception. Detached houses
         (b)   Face brick or stone shall encompass not less than 90% of the ground level, not including windows and doors. Ground level shall be defined to be eight feet measured vertically from the adjacent grade.
            (1)   Exception. Detached houses (Ord. 2021-4931, 11-15-2021; amd. Ord. 2022-4972, 8-1-2022)

5-16-3: NONRESIDENTIAL ARCHITECTURAL DESIGN STANDARDS:

   (A)   Applicability
      1.   The nonresidential architectural design standards of this Section apply to the construction of a new principal building containing the following uses:
         (a)   Buildings containing uses not classified in the residential use category as defined in Chapter 7 of this Ordinance.
         (b)   Mixed use buildings, including mixed use buildings that contain residential uses.
         (c)   Multi-unit buildings. as defined in Chapter 7 of this Ordinance.
   (B)   Façade Articulation. Street facing façades shall consist of one of the following design elements:
      1.   Changes in horizontal or vertical plane with a depth of a minimum of two feet occurring at intervals not less than 20 feet or more than 100 feet.
      2.   Changes in exterior wall covering color, texture, or material, horizontally or vertically, at intervals not less than 20 feet or more than 100 feet.
      3.   A repeating pattern of recesses and projections with a relief of at least 8 inches.
   (C)   Architectural Relief. No more than one side with fewer than four outside corners as measured at the foundation plane and carried through the exterior wall plane(s). To qualify as an outside corner, the corner must be located within 30 feet of the side in question. Outside corners shall be defined according to Figure 1 and Figure 2 below.
      1.   Exception. Buildings containing uses classified in the Industrial use category as defined by Chapter 7 of this Ordinance.
Figure 1. Prohibited Design
 
Figure 2. Permitted Design
 
   (D)    Customer Entrances. All street facing facades shall include at least one customer entrance. Where a principal building directly faces more than two streets, this requirement shall apply only to two sides of the building. Customer entrances shall include one of the following design elements:
      1.   Recess or projection
      2.   Canopy or overhang
      3.   Architectural details, such as raised corniced parapets, arches, or pediments
      4.   Pilaster or decorative columns projecting a minimum of 8 inches
      5.   Similar architectural design elements approved by the Zoning Administrator.
   (E)   Primary Entrance Design. All principal buildings shall include one clearly defined primary entrance. Primary entrances shall consist of at least two of the following design elements:
      1.   Recess or projection
      2.   Arcade
      3.   Portico
      4.   Canopy or overhang
      5.   Architectural details, such as raised corniced parapets, arches, or pediments
      6.   Integral planters or wing walls
      7.   Pilaster or decorative columns projecting a minimum of 8 inches
      8.   Similar architectural design elements approved by the Zoning Administrator.
   (F)   All facades of a building that are visible from adjoining properties and/or streets shall feature architectural features similar to the street facing façade.
   (G)   Building Material
      1.   Primary building material shall encompass a minimum of 50% of the exterior wall area, not including windows and doors. In addition, the primary building material shall encompass 100% of the ground level. Ground level shall be defined to be eight feet measured vertically from the adjacent grade. Acceptable primary building materials include the following:
         (a)   Face brick, stone, or glass
         (b)   Exception: Buildings containing uses classified in the Industrial use category as defined by Chapter 7 of this Ordinance.
      2.   Accent building material shall encompass a maximum of 50% of the exterior wall area, not including windows and doors. Acceptable accent building materials include the following:
         (a)   Split face concrete masonry unit
         (b)   Fiber cement
         (c)   Architectural metal cladding
         (d)   Pre-cast concrete, if texturing, banding, or masonry inlay products are utilized.
         (e)   The Zoning Administrator is authorized to approve accent building materials not addressed herein on a case-by-case basis in which the accent building material shall be evaluated based upon such factors as durability, quality, maintenance, architectural intent, and compatibility with the surrounding character of development.
         (f)   Exception: Buildings containing uses classified in the Industrial use category as defined by Chapter 7 of this Ordinance.
   (H)   Roof Design. Roof design shall consist of at least one of the following design elements:
      1.   Parapets with horizontal tops having height changes of at least one foot occurring not less than every 100 feet of building frontage.
         (a)   Regardless of building frontage, a minimum of three height changes of at least one foot shall be required.
      2.   Sloping roofs with a roof slope plane change occurring not less than every 100 feet of building frontage.
         (a)   Regardless of building frontage, a minimum of three roof slope plane changes shall be required.
         (b)   Overhanging eaves shall be provided with sloping roofs.
         (c)   Sloping roofs shall have a minimum roof pitch of 3:12.
   (I)   Rooftop Equipment Screening. When rooftop equipment exists, parapet walls shall be utilized to screen all equipment and appurtenances from the public right-of-way and adjacent properties. Parapet walls must be constructed to a height that is greater than the equipment or appurtenance height, unless demonstrated by line of sight analysis.
   (J)   Windows
      1.   Street facing facades and facades adjacent to parking areas or pedestrian paths shall incorporate transparent features (clear glass on windows and doors) over a minimum percentage of the wall surface area at ground level. Ground level shall be defined to be between two and eight feet measured vertically from the adjacent grade.
         (a)   For retail, eating, or drinking establishments, a minimum of 50% shall be transparent.
         (b)   For all other uses, a minimum of 35% shall be transparent. (Ord. 2021-4931, 11-15-2021; amd. Ord. 2022-4972, 8-1-2022; Ord. 2023-5042, 12-18-2023)

5-16-4: ANTI-MONOTONY STANDARDS:

   (A)   Applicability
      1.   The anti-monotony standards of this Section apply to all new detached houses.
         (a)   Exception. The Zoning Administrator is authorized to modify the standards of this Section when the applicant for a building permit could not be expected to anticipate the design of a neighboring detached house for which a building permit has already been issued but is not yet built.
   (B)   Standards
      1.   No building permit shall be issued for any new detached house which street facing facade is of substantially similar to any other detached house within three lots on either side of the subject property and within the four nearest lots across the street.
      2.   Substantially Similar. To be determined not to be substantially similar, the street facing façade must differ in a minimum of two of the following characteristics:
         (a)   Roof type (gable, hip, mansard, gambrel, or combination)
         (b)   Number of stories
         (c)   Shape or silhouette
         (d)   Relative location and size of windows
         (e)   Entryway design elements
         (f)   Garage orientation
         (g)   Primary and accent building materials (type, style, or location) (Ord. 2021-4931, 11-15-2021)