Carroll County, Ohio

SECTION V  -   Subdivision Design Standards

 

5.1          LOTS

 

5.1.01  General: The lot size, shape, orientation, and minimum setback lines shall be appropriate for the location of the subdivision and for the type of development and use contemplated.

 

5.1.02  Lot Dimensions: (minimums) Shall be governed by the following table and conditions:

 

Type of Development	Centralized water and sewer available	Centralized sewer available	Neither centralized water or sewer available
Single Family	75’ Width 9,375 Sq. Ft.	100’ Width 20,000 Sq. Ft.	140’ Width 36,000 Sq. Ft.
Two Family	95’ 13,300 Sq. Ft.	120’ Width 27,600 Sq. Ft.	200’ Width 50,000 Sq. Ft.
Multi-Family	110’ Width 5,000 Sq. Ft. per dwelling unit	150’ Width 14,000 Sq. Ft. per dwelling unit	To be considered individually
Commercial or Industrial – To be considered individually

 

A)    All widths are to be measured at the required building setback 1ine.

 

B)    In case of unusual soil conditions or other physical factors which may impair the health and safety of the neighborhood in which a subdivision may be located, upon recommendation of the County Board of Health or the County Engineer, the Commission may require larger lot widths and lot areas as deemed necessary or may require the installation of an adequate sewage disposal plant.

 

C)    In zoned townships the lot dimensions, the lot area, and building setback lines shall conform to the zoning ordnance where the standards are higher than those in these regulations.

 

D)    The Width to Depth ratio of a lot shall not exceed 1 to 5.

 

E)    Rear lot lines shall have a minimum length of 25 feet.

 

F)    Corner lots for residential use shall have the required extra width or such other provisions as are deemed necessary to permit building setbacks with respect to both streets.  Corner lots with no public water or sewer available shall have an additional minimum area of 4,000 square feet. (0.092 acres)

 

5.1.03  Exceptions: Every tract or lot which is not covered under 5.1.02 of the Carroll County Subdivision Regulations shall front upon or abut an existing public road shall have a minimum of twenty -five (25) feet and shall be located in an area that can be developed for the access by a conventional automobile, however, this does not affect the sale or exchange of parcels between lot owners as stated in the Carroll County Subdivision Regulation Section 4.2.02.

 

5.1.04  Street Frontage: All Lots shall abut by their full frontage on a dedicated "Public" or "Private" Street.

 

5.1.05  Double Frontage Lots:  Double frontage lots may be allowed where they are essential to provide separation of residential development from traffic arteries or to overcome specific disadvantages of topography and orientation.  Their use, however, should be avoided except as a last resort.

5.1.06  Building Setback Lines: The minimum residential building setback line shall be forty (40) feet for lots fronting on minor streets and fifty (50) feet for lots fronting on secondary and primary streets.  Double frontage lots and corner lots shall maintain the required setback distances from all streets right-of-way lines.

 

5.1.07  Side Yard Requirements:

 

A) Residential:   Two side yards, each having a minimum width of eight (8) feet and together having a combined minimum of twenty (20) feet shall be required.

           

            There shall be a minimum side yard clearance for every garage and accessory building hereinafter erected, independent of the dwelling unit and not attached, thereto, of at least five (5) feet.

 

B) Commercial or Industrial: Side yard requirements for commercial and industrial buildings shall be determined by local zoning resolutions and/or the Ohio State Building Code.

 

5.1.08  Rear Yard Requirements: There shall be a rear yard clearance between any structure erected and the rear lot line, or alley right-of-way, if present, of five (5) feet.

 

5.1.09  Lot Numbering: All lots shall be numbered in progressive numbers under one of the following systems:

 

A)    If a subdivision lies within the three (3) mile jurisdiction of a municipality, the numbering system employed by that municipality shall be used.

 

B)    For subdivision lying outside the jurisdiction of a municipality, the numbering system of the township shall be used if one exists.

 

C)    If a subdivision is located in an area where neither (A) nor (B) above apply, the subdivider shall number the lots in a uniform and progressive manner suitable to the general pattern of the development.  When several plats are used to completely develop an area and the plat names are the same except for the number of each plat, the lot numbers shall be consecutive throughout the series of plats to prevent confusion when lots are transferred.

 

 

5.2          BLOCKS

 

5.2.01  Pattern: Blocks shall be designed to meet existing topographic conditions, provide adequate building sites, and provide adequate access and traffic circulation.

 

5.2.02  Dimensions: Blocks shall normally provide for two rows of lots and shall normally by not less than 450 feet nor more than 1320 feet in length.

 

5.2.03  Walkways: Walkways with a ten (10) foot right-of-way or easement width may be required through a block to provide access to schools, playgrounds, or other community facilities.

 

 

5.3          STREETS

 

5.3.01  Pattern: All streets and roads shall be arranged in conformity with accepted practice in subdivision design, existing and planned streets, topography, these regulations, and shall provide for public convenience and safety.  Local streets shall be arranged to discourage through traffic.

 

5.3.02  Major Thoroughfare Plan: All streets and roads shall conform in right-of -way width and alignment to Carroll County Major Thoroughfare Plan.

 

5.3.03  Reservation: When land is subdivided fronting on an existing street or road,  the Commission may require an opening to be reserved for necessary public right-of-way or easement for traffic, utilities and drainage through said subdivision to lands located to the rear in order to prevent

            landlocking or isolation of such property.

 

5.3.04   Extensions: When an area is being subdivided, the streets shall be extended to the surrounding undeveloped areas in accordance with block requirements.  A temporary turnaround may be

            required.

 

5.3.05  Horizontal Alignment:

 

A)    Jogs:   Street  jogs shall be discouraged but where necessary shall be not less than 125 feet.

 

B)    Intersections:  

 

1.  Proposed street’s shall intersect as close to right angles as possible with no angle of intersection being less than 70 degrees.

 

2.  Approaches to street intersections shall be straight for a distance of 100 feet from the centerline of the street intersected.

 

3.  Right-of-way lines at street intersections shall be connected by a curve with a minimum radius of 25 feet.

 

C)    Reverse Curves:   A minimum tangent length of 100 feet shall normally be required between reverse curves on all but minor and local streets and frontage roads.

 

D)    Classification Table:

 

                       

Classification	Minimum Right-of-Way Ft.	Minimum Centerline Radius Ft.	Maximum Grade %	Maximum Centerline Deflection without a curve
Expressway or Freeway	Use applicable State or Federal Standards
Rural Minor Arterials	100	716	6	5°
Rural Major Collector	80	318	7	10°
Rural Minor Collectors	60	230	8	10°
Local Rural & Urban Street	50	100	10	10°
Frontage Road	50	100	10	10°

 

E)    Horizontal Curves:  A centerline which deflects shall be connected by a curve in accordance with the values in the classification table.

 

F)    Half Streets:

 

      1)   Half streets shall be prohibited except under one (1) of the following conditions:

 

A)  The Commission finds it will be practicable to require the dedication of the other half of the street when the adjoining acreage is subdivided.

 

B)   There exists a half street which should logically be continued to a reasonable intersection.

 

C)   There exists a dedicated or platted half street adjacent to the tract to be subdivided, the other half shall be platted if deemed necessary, and advisable by the Commission.

 

        2)   Where a half street is permitted, the Commission may require provisions to prevent access from abutting property outside the subdivision until the other half of the said street is established as a public street.

 

 

G)    Dead-end Streets

 

      1)   Permanent:

 

A)   Permanent dead-end streets or cul-de-sacs shall be used only where a continuous street is not practical.  Such a street shall be no longer than eight hundred (800) feet including the length of the turning area and shall be provided at the closed end with a turn-around having a right-of-way radius of at least fifty (50) feet where parking is prohibited and sixty (60) feet where parking is permitted.  The street right-of-way lines and the circumferences of the turnaround shall be joined by an arc with a radius of at least fifty (50) feet.  Cul-de-sac pavements shall have a minimum radius of forty (40) feet.

 

B)  Where only single-family residences are involved and where the street does not exceed three hundred fifty (350) feet in length, a T-type back-around terminus may be approved within the normal right-of-way.

 

      2)   Temporary

 

A)  Where streets are extended to the boundary of a subdivision to provide for their proper continuance at such a time as the adjacent land is subdivided, they may be terminated with a T-type back-around within the normal right-of-way.

 

B)   If a street extends only one (1) lot past a street intersection, no turn-around is required.

 

H)    Frontage Roads:   Where a subdivision borders on, or contains a railroad right-of-way or limited access highway right-of-way, the Commission may require a frontage road approximately parallel to and on each side of such right-of-way for a distance suitable for necessary traffic circulation.

 

5.3.06  Vertical Alignment: Vertical grades of streets shall be governed by the values given in the "Classification Table" 5.3.05 (D).  The minimum grade on any road or street is 0.5%

           

The required length of a vertical curve to connect two grades on a crest depends on the stopping sight distance needed which in turn depends on the design speed of the street.  Minimum vertical curve length can be determined from referring to Figure 1 in the Appendix when the desired design speed and the grades are known.  Even if the chart in Figure 1 indicates there is no vertical curve needed, a vertical curve shall be required with a minimum length of forty (40) feet where the difference in grades is two (2) percent or greater.

 

The grade of an approach to an intersection should be kept as flat as the terrain will allow for a reasonable distance from the intersection.