St Robert, MO Zoning Ordinance

St Robert City Zoning Code

CHAPTER 412

Density and Dimensional Regulations

Section 412.001 Minimum Lot Size.

[Ord. No. 2118 §§1 — 3, 8-18-2008]

Every building hereafter erected or structurally altered shall be located on a lot as herein defined and in no case shall there be more than one (1) principal building on a lot except as otherwise provided in this regulation.

All lots in the designated zones shall have at least the amount of square footage indicated in Section 412.015. Subject to Section 412.005, every lot developed for residential purposes shall have a lot area equal to or greater than that indicated in Section 412.015, based on the number of dwelling units. In determining the number of dwelling units permissible on a tract of land, fractions shall be rounded to the nearest whole number.

Section 412.003 Residential Floor Area.

[Ord. No. 2118 §§1 — 3, 8-18-2008]

Every building hereafter erected, or structurally altered, to be used as a residential dwelling shall meet or exceed the minimum floor area requirements set forth in the International Residential Code (IRC) adopted by the City of St. Robert.

Section 412.005 Minimum Lot Widths.

[Ord. No. 2118 §§1 — 3, 8-18-2008]

No lot may be created that is so narrow or otherwise so irregularly shaped that it would be impracticable to construct on it a building that:

Could be used for purposes that are permissible in that zoning district, and

Could satisfy any applicable setback requirements for that district.

Without limiting the generality of the foregoing standard, Section 412.015 indicates minimum lot widths that satisfy the standard set forth in Subsection (A). The lot width shall be measured along a straight line connecting the points at which a line identifies where the required setback from the street intersects with lot boundary lines at opposite sides of the lot.

No lot that is less than the minimum lot width set forth in Section 412.015 shall be entitled to a variance from any building setback requirement.

Section 412.007 Setback Requirements.

[Ord. No. 2118 §§1 — 3, 8-18-2008]

Subject to Section 412.009 and the other provisions of this Section, no portion of any building may be located on any lot closer to any lot line or to the street right-of-way line or centerline than is authorized in the Table set forth in this Chapter.

As used in this Section, the term "building" includes any substantial structure which by nature of its size, scale, dimensions, bulk or use tends to constitute a visual obstruction or generate activity similar to that usually associated with a building. Without limiting the generality of the foregoing, the following structures shall be deemed to fall within this description:

Gas pumps and overhead canopies or roofs.

Light standards for parking lot lighting.

Satellite receiving dishes.

Fences running along boundaries adjacent to public street rights-of-way if such fences exceed six (6) feet in height.

As used in this Section, the term "lot boundary line" refers to lot boundaries other than those that abut the streets.

The building setback table indicates the minimum setback for buildings in each zoning district. If the street right-of-way line is readily determinable (by reference to a recorded map, set irons or other means), the setback shall be measured from such right-of-way line. If the right-of-way line is not so determinable, the setback shall be measured from the street centerline.

The Land Use Administrator may waive the setback from lot boundary lines for buildings in "C" commercial or "I" industrial zones when a common fire wall is provided between buildings.

Whenever a lot in a "C" Commercial District or the "I-1" Industrial District has a common boundary line with a lot in a "R" or "R-M" Residential District, no building, structure or any storage or display of merchandise, equipment or vehicles on the commercial or industrial lot is allowed within twenty-five (25) feet of the boundary line shared with property in the "R" or "R-M" District.

Whenever a lot in the "I-2" Industrial District has a common boundary line with a lot in a "R" or "R-M" Residential District, no building, structure or any storage or display of merchandise, equipment or vehicles on the commercial or industrial lot is allowed within one hundred (100) feet of the boundary line shared with property in the "R" or "R-M" District.

Setback distances shall be measured from the property line or street right-of-way line to a point on the lot that is directly below the nearest extension of any part of the building that is substantially a part of the building itself and not a mere appendage to it (such as a flagpole, etc.).

Buildings located adjacent to private roads serving or intended to serve more than three (3) lots or more than three (3) dwelling units or that serves any non-residential use tending to generate traffic equivalent to more than three (3) dwelling units shall be set back from the centerline of the private road a minimum of fifteen (15) feet.

Light standards at points of ingress and egress are allowed within the minimum yard setback when approved by the Public Works Director.

Motor vehicles, mobile homes, trailers, boats or equipment parked, stored or displayed outside shall be located:

No closer than five (5) feet from any street right-of-way line; and

So as to not encroach upon any portion of a utility easement or easement of access.

In mixed-use ("MU") zoning districts, no lot may have both a zero (0) side yard and a zero (0) rear yard.

Section 412.009 Accessory Building Setback Requirements.

[Ord. No. 2118 §§1 — 3, 8-18-2008]

All accessory buildings in "R" Residential Districts must comply with the street right-of-way and side lot boundary setbacks set forth in Section 412.015 but, subject to the remaining provisions of this Subsection, shall be required to observe only a five (5) foot setback from rear lot boundary lines.

Maximum lot coverage of an accessory building shall not exceed thirty percent (30%) of the rear yard area.

No accessory building, structure or appurtenance thereon shall extend into any public right-of-way, utility easement or easement of access.

All accessory buildings in non-residential districts must comply with the designated street right-of-way and side yard setback requirements.

Section 412.011 Building Height Limitations.

[Ord. No. 2118 §§1 — 3, 8-18-2008]

For purposes of this Section:

The height of a building shall be the vertical distance measured from the average elevation of the finished grade within twenty (20) feet of the structure to the highest point of the roof.

A point of access to a roof shall be the top of any parapet wall or the lowest point of a roof's surface, whichever is greater.

Subject to the remaining provisions of this Section, building height limitations in the various zoning districts shall not exceed those identified in Section 412.015.

The height limitations delineated in Section 412.015 may be amended for non-residential structures at the recommendation of the Commission and the approval of the Board of Aldermen if the structure to be constructed meets the use group design and construction type requirements for height limitations and area modifications as delineated in the adopted Building Code of the City.

Subject to Subsection (E), the following features are exempt from the district height limitations as set forth in Section 412.015:

Chimneys, church spires, elevator shafts and similar structural appendages not included as places of occupancy or storage.

Flagpoles and similar devices.

Heating and air-condition equipment, solar collectors and similar equipment, fixtures and devices.

The features listed in Subsection (D) are exempt from the height limitations set forth in Section 412.015 if they conform to the following requirements:

Not more than one-third (1/3) of the total roof area may be consumed by such features;

The features described in Subsection (D)(3) above must be set back from the edge of the roof a minimum distance of one (1) foot for every foot by which such features extend above the roof surface of the principal building to which they are attached;

The permit issuing authority may authorize or require that parapet walls be constructed (up to a height not exceeding that of the features screened) to shield the features listed in Subsections D(1) and (3) from view.

Towers and antennas are allowed in all zoning districts to the extent authorized in Chapter 404 (Permissible Uses). Telecommunication towers are governed by the criteria delineated in Chapter 411 of this regulation.

Section 412.013 Sight Triangle Regulations.

[Ord. No. 2118 §§1 — 3, 8-18-2008]

Other provisions of this regulation notwithstanding, on corner lots nothing shall be erected, placed, planted or allowed to grow in such a manner as to materially impede vision which exceeds three (3) feet in height above the grades at the back of the curb of the intersecting streets, within the triangular area formed by the right-of-way lines and a line connecting them at points ten (10) feet from their point of intersection or at equivalent points on private streets.

Section 412.015 Lot Density and Dimensional Tables.

[Ord. No. 2118 §§1 — 3, 8-18-2008]

The minimum area, setbacks, density and maximum height restrictions within each zoning district are prescribed in the following table:

District	Minimum Lot Area	Maximum Density^a	Minimum Lot Width	Minimum Front Yard Setback	Minimum Side Yard Setback^c	Minimum Rear Yard Setback^c	Maximum Building Height	Maximum Gross Lot Coverage^b
AGRICULTURAL
"A-1"	3 acres	1 du/3 acres	200 feet	35 feet	25 feet	50 feet	35 feet	25%
RESIDENTIAL
"R-1L"	20,000 sf	1 du/1 acre	125 feet	25 feet	15 feet	30 feet	35 feet	30%
"R-1M"	10,000 sf	4 du/1 acre	75 feet	25 feet	10 feet	15 feet	35 feet	40%
"R-1H"	6,000 sf	6 du/1 acre	65 feet	25 feet	5 feet	20 feet	35 feet	40%
"R-2"	10,000 sf	4 du/1 acre	70 feet	20 feet	10 feet	20 feet	35 feet	40%
"R-3"	8,500 sf	28 du/1 acre	75 feet	20 feet	10 feet	20 feet	40 feet	40%
"R-M"	6,000 sf	8 du/1 acre	60 feet	15 feet	10 feet	15 feet	35 feet	40%
COMMERCIAL
"C-O"	6,000 sf	12 units per acre	70 feet	25 feet	5 feet	5 feet	40 feet	40%
"C-1	N/A	N/A	65 feet	30 feet	5 feet	5 feet	50 feet	40%
"C-2"	N/A	N/A	70 feet	30 feet	5 feet	5 feet	50 feet	40%
MIXED-USE
"MU-1"
Single-use Project (combined uses)	3 acre	40 units per acre	N/A	20 feet (maximum)	5 feet^c	5 feet^c	3 stories	N/A
Single-use Project One- and Two-Family	10,000 sf	4 du/1 acre	60 feet	20 feet (maximum)	10 feet^c	5 feet^c	2 stories	30%
Single-use Project Townhomes/ Condo	8,000 sf	18 du/1 acre	60 feet	20 feet (maximum)	10 feet^c	5 feet^c	2 stories	30%
Mixed-use Project (combined uses)	10 acre	60 units per acre	N/A	20 feet (maximum)	0 c	0 c	4 stories	N/A
"MU-2"
Single-use Project (combined uses)	5 acre	60 units per acre	N/A	20 feet (maximum)	5 feet^c	5 feet^c	4 stories	N/A
Single-use Project One- and Two-Family	10,000 sf	5 du/1 acre	60 feet	20 feet (maximum)	10 feet^c	5 feet^c	2 stories	30%
Single-use Project Townhomes/ Condo	6,000 sf	24 du/1 acre	60 feet	20 feet (maximum)	10 feet^c	5 feet^c	2 stories	N/A
Mixed-use Project (combined uses)	20 acre	N/A	N/A	20 feet (maximum)	0^c	0^c	5 stories	N/A
INDUSTRIAL
"I-1"	N/A	N/A	75 feet	30 feet	0	0	50 feet	N/A
"I-2"	N/A	N/A	100 feet	50 feet	0	0	50 feet	N/A
PUBLIC
"P-1"	N/A	N/A	N/A	40 feet	0	0	50 feet	N/A

a.	Maximum density is the maximum number of dwelling units (du) or units per 1 acre (ac) of land area.
b.	Maximum lot coverage is the gross percentage of all primary and accessory buildings permitted on a lot.
c.	A 5 foot landscaped buffer and 20 foot setback will be established between an "MU" district and an adjacent "R" district.

All front yard setback distances shall be measured in a straight line from the street right-of-way line to the building or structure the street provides frontage to. In the case of corner lots, the minimum front yard setback distance shall apply to both sides of the building or structure that the two (2) streets provide frontage to.