To carry out the purpose and the provisions of this title, the following zones and overlays are established:

All areas within the corporate limits of the city are divided into zoning districts. The use of each tract and ownership of land within the corporate limits is limited to those uses permitted by the zoning classification applicable to each such tract as designated on the city of Aurora zoning map. Density shall generally be as follows:

A.

R-1 Low residential density: average lot size seven thousand five hundred (7,500) square feet equal to 4.36 units per acre.

B.

R-2 Moderate residential density: average lot size five thousand (5,000) square feet equal to 6.53 units per acre.

C.

HR Historic residential density overlay: minimum lot size ten thousand (10,000) square feet equal to 3.27 units per acre.

Exact densities are subject to area, height, density and setback provisions of each district.

A.

The boundaries of the zones established in this title are to be indicated on a map entitled "City of Aurora Zoning Map," referred to hereafter as the city zoning map, which is adopted by reference. The map shall be dated with the effective date of adoption and be signed by both the Mayor and City Recorder.

B.

Each lot, tract and parcel of land or portion thereof within the zone boundaries as designated and marked on the zoning map, is classified, zoned and limited to the uses as hereinafter specified and defined for the applicable zone classification.

C.

Amendments to the city zoning map may be made in accordance with the provisions of Chapters 16.74 and 16.76. Copies of all map amendments shall be dated with the effective date of the document adopting the map amendment and shall be maintained without change, together with the adopting document, on file in the office of the City Recorder.

D.

The City Recorder shall maintain an up-to-date copy of the city zoning map. Any map amendments shall be accurately portrayed, listed in the amendment column on the face of the map, with the date, the number of the ordinance authorizing the change and the initials of the City Recorder.

When there is uncertainty, contradiction or conflict as to the intended location of any zone boundary, the exact location shall be determined by the City Recorder in accordance with the following standards:

A.

Street Lines. Where the boundaries are indicated as following approximately the street, alley or railroad center lines, such lines shall be construed to be the zone boundaries.

B.

Street Vacations. Whenever a street is lawfully vacated, the area vacated shall revert (in equal proportions) to the adjoining properties and shall acquire the zone classification of the property to which it reverts.

C.

Lot Lines. Where the boundaries are indicated as following approximately the lot lines, such lot lines shall be construed to be the zone boundaries. If a zone boundary divides a lot into two zones, the entire lot shall be placed in the zone that accounts for the greater area of the lot, by means of an adjustment of the boundary of not more than fifty (50) feet.

D.

Water Courses. The boundary lines are intended to follow the center lines of water courses.