16.10.110 – Calculation of estimated population

  1. Calculation of Requirement

Table of Estimated Ultimate Population Per Dwelling Unit

 

Type of Unit

Elementary

Grades K-5

5 – 10 years

Middle

Grades 6 – 8

11 – 13 years

High School

Grades 9 – 12

14 – 17 years

Total Population

 

Detached Single Family

  • 2 bedroom

0.136

0.048

0.020

2.017

  • 3 bedroom

0.369

0.173

0.184

2.899

  • 4 bedroom

0.530

0.298

0.360

3.764

  • 5 bedroom

0.345

0.248

0.300

3.770

 

Attached Single Family (Townhomes)

  • 1 bedroom

0.000

0.000

0.000

1.193

  • 2 bedroom

0.088

0.048

0.038

1.990

  • 3 bedroom

0.234

0.058

0.059

2.392

  • 4 bedroom

0.322

0.154

0.173

3.145

 

Multi Family (Condo/Apartment)

  • Efficiency

0.000

0.000

0.000

1.294

  • 2 bedroom

0.002

0.001

0.001

1.758

  • 3 bedroom

0.086

0.042

0.046

1.914

  • 4 bedroom

0.234

0.123

0.118

3.053

Source: Illinois School Consulting Service/Associated Municipal Consultants Inc., 1996

The “Table of Estimated Ultimate Population Per Dwelling Unit” shall be used to calculate the amount of required park and school site land and cash contributions in lieu thereof. It is recognized that population density, age distribution, and local conditions change over time, and that, therefore, the table is subject to periodic review and amendment as necessary.

B. Objection

A written objection to “The Table of Estimated Ultimate Population Per Dwelling Unit” may be filed by the Subdivider, or by the School or Park District, prior to City Council approval of the Preliminary Plat. The City shall notify the School District and the Park District of any objection and shall provide the School District and Park District at least ninety (90) days to file their own response. Such objection shall include a demographic study showing the estimated ultimate population to be generated by the subdivision. Final determination of the estimated ultimate population shall be made by the City

Council at the time of Preliminary Plat approval.

C. Credit for Existing Lots and Dwellings

A credit to the estimated population shall be granted as follows:

  1. Existing Subdivided Lots: Lots previously subdivided for residential use, pursuant to a Subdivision Plat previously approved by the City of St. Charles and previously recorded with the County Recorder of Deeds, shall receive a credit calculated as a reduction of one residential unit per existing subdivided lot located wholly within the proposed subdivision.
  2. Existing Lots of Record: Portions of previously subdivided lots that were lawfully conveyed as Lots of Record prior to September 17, 2012, provided said Lots of Record meet the minimum lot width and area requirements of the applicable zoning district in which it is located, shall receive a credit calculated as a reduction of one residential unit per existing Lot of Record located wholly within the proposed subdivision.
  3. Existing Residential Dwellings: Existing residential dwellings shall receive a credit calculated as a reduction of the estimated population for the dwelling based upon the formulas within this chapter. A credit shall not be granted under sections 1 and 2 above for any lot receiving a credit for an existing dwelling under this section.

D. Institutional Uses

A “Nursing Home” or “Assisted Living Facility”, as defined in Title 17 of the City Code, and similar institutional uses, shall not be considered residential dwellings, and therefore units or rooms within such facilities shall not be included in the calculation of estimated population.

(2018-M-29: § 2)