Tuolumne County Municipal Code Ch. 12.12 Uniform Property Numbering System
Tuolumne County Municipal Code · 2026-09 edition · updated 2026-10-02 · Tuolumne County
Cite as: Tuolumne County Municipal Code Chapter 12.12 · Text as of 2026-10-02
Sections:
12.12.010 Purpose.
12.12.020 Adoption of system by cities.
12.12.030 Basis for system-Point of origin.
12.12.040 Master grid index map.
12.12.050 Subindex grid maps.
12.12.060 Road names.
12.12.070 Administration.
12.12.080 Display of numbers.
12.12.090 Legal description of property not affected.
12.12.100 Enforcement responsibility.
12.12.110 Violation; enforcement.
12.12.010 Purpose. The board of supervisors¶
hereby finds and declares that the public interest, safety, welfare and convenience require the establishment of a uniform system of street and road addresses in the unincorporated areas of the county. To accomplish this purpose, the "Uniform Property Numbering System" described in this chapter is established. (Ord. 817 § 1 (part), 1975; prior code § 7-19.0).
12.12.020 Adoption of system by cities. Any¶
city within the county may adopt the uniform property numbering system. (Ord. 817 § 1 (part), 1975; prior code § 7-19.1).
12.12.030 Basis for system - Point of origin.¶
The basis for the uniform property numbering
system shall be a point of origin which shall be
the intersection of a west base line and a south
base line. The west base line shall run due north
and south to include the westernmost territory of
the county. The south base line shall run due
east and west to include the southernmost
territory of the county. Index lines shall run
parallel with their respective base lines at two
kilometer intervals. Numbers shall be assigned
along each base line in increasing magnitude in
easterly and northerly directions in accordance
with the distance from the point of origin. Eight
hundred numbers shall be assigned to each mile
along each base line, which, for the purposes of
this chapter. shall be deemed equivalent to one
thousand numbers to each two kilometers, and
will begin with the number one at the point of
origin. For the purpose of determining the proper
number for a particular location, the number
assigned shall be proportioned to the distance of
the location from its adjoining index lines and
shall be in sequence with numbers established on
adjacent properties. On all streets and roads the
numbers on the north side and the west side
shall be even numbers and the numbers on the
south side and the east side shall be odd
numbers.
(Ord. 817 § 1 (part), 1975; prior code § 7-19.1).
12.12.040 Master and index map. A master¶
grid index map or maps shall be adopted by the board of supervisors showing the point of origin, base lines and index lines. The map or maps shall become effective on adoption by the board. (Ord. 817 § 1 (part), 1975; prior code § 7- 19.3(A)).
12.12.050 Subindex and maps. Subindex maps¶
shall be prepared by the county surveyor
showing details of precisely numbered areas.
These maps shall then be maintained as
necessary by the county surveyor to designate
the numbers and location of numbers assigned to
particular buildings or lands. These maps shall
become effective on completion or revision by
the County Surveyor. (Ord. 817 § 1 (part),
1975; prior code § 7-19.3(B)).
12.12.060 Road names. All streets and roads.,¶
whether public or private, whether dedicated or not, and county highways (all hereinafter referred to as "roads") shall be named pursuant to this section and such roads shall be known by the name assigned. No road shall be deemed officially named unless it has been approved by
the board of supervisors by order duly made and
reflected in its minutes or by resolution. All
official names existing on January 8, 1976, shall
remain the same until changed pursuant to this
section. The road department shall administer
this section and shall have administrative
responsibility for all road naming in the county.
The road department shall maintain a list of all
road names so approved or in existence and shall
certify to the board of supervisors that no name
submitted for approval duplicates or so closely
approximates an existing name as to cause
confusion. The road department shall initiate a
program to officially name all existing roads for
which no name has been officially assigned and
shall cause any future roads to be officially
named. Where unofficial road names exist or are
commonly used on January 8, 1976, they may
continue to be used, and the road department
shall initiate their official naming, provided that
they are not in conflict with existing official
names. Where a public hearing is required to
officially name, or change the name of, a road,
the road department shall initiate such a hearing
before the board of supervisors. No subdivision
or division of land shall be approved until all the
roads therein or contiguous thereto have been
officially named by the board of supervisors after
initiation by the road department. A road may
bear one name for its entire length or where a
road changes direction by ninety degrees or
greater, a different name may be adopted for
such changed direction to facilitate its
numbering. (Ord. 817 § 1 (part), 1975; prior
code § 7-19.4).
12.12.070 Administration. The uniform¶
property numbering system shall be initiated, continued, operated and maintained by the county surveyor and all numbers assigned shall be in accordance with this chapter. It shall be the duty of the community development department to require the installation of numbers as required by this chapter prior to the start of construction on any new construction completed after the effective date of subindex maps for the area in which the construction is taking place. (Ord. 2314 § 36, 1999; Ord. 1875 § 4, 1991; Ord. 817 § 1 (part), 1975; prior code § 7-19.5).
12.12.080 Display of numbers. After the¶
effective date of any subindex map, or revision thereof, the county surveyor shall give written notice to the owner or occupant of buildings or land which are assigned, or reassigned numbers pursuant to his chapter, which notice shall contain the new number assigned. Written notice may be given by posting, personal delivery or first class mail. Notice for new construction shall be given to the community development department which shall require display of the number prior to the start of construction. Within thirty days after the county surveyor has given notice, the owner or occupant of the building or property shall cause the number to be displayed horizontally on the building or land in such manner as to be visible from the street or road on which the building or land fronts and shall remove or obscure from public view any old or previous numbers not in accordance with this chapter. Where a building is located more than fifty feet from the edge of the main road surface to the edge of the building the number shall be displayed at the entrance of any roadway or driveway leading to the building and be readable and legible from both directions on the main road, including one-way roads. Numbers shall be maintained in a neat and orderly manner so as to remain readable.
A. Numbers shall be displayed in the following format:
Single Family Residential: Size of letters, numbers, and symbols for addresses shall be a minimum four inch letter height, one-half inch stroke, reflectorized, contrasting with the background color of the sign.
Multi-family residential (duplex, triplex, fourplex and apartment complexes): size of letters, numbers and symbols for addresses shall be a minimum four inch letter height, one-half inch stroke, reflectorized, contrasting with background color of the sign. Addresses mounted to buildings will use same size configuration and be illuminated.
Commercial/industrial complexes and buildings: Size of letters, numbers and symbols for addresses shall be a minimum of six inch letter height, five-eighth inch stroke, reflectorized, contrasting with background color of the sign. Addresses mounted to buildings will use same size configuration and be illuminated.
Letters, numbers or symbols may not exceed twelve inches in height.
B. Installation, location and visibility of addresses:
- Any number not attached to a building
shall be located at least four feet from the improved shoulder of the adjacent roadway and shall be no higher than four feet from ground level and no lower than three feet from ground level, and be mounted on a pressure treated or decay resistant post. All numbers shall be attached or mounted to be visible and legible from the road on which the address is located.
Where multiple addresses are required at a single driveway, they shall be mounted on a single post with all numbers placed no lower than three feet from ground level.
Where a roadway provides access solely to a single commercial or industrial business, the numbers shall be placed at the nearest road intersection providing access to that site. (Ord. 3016 § 3, 2009; Ord. 2314 § 37, 1999; Ord. 1875 § 5, 1991; Ord. 817 § 1 (part), 1975; prior code § 7-19.6).
12.12.090 Legal description of property not¶
affected. The adoption and implementation of this chapter shall in no manner affect the legal description of any property. (Ord. 817 § 1 (part), 1975; prior code § 7-19.7).
12.12.100 Enforcement responsibility. The¶
Community Development Department, the Code Compliance Officer, the Sheriff and the employees thereof shall enforce the provisions of this chapter. (Ord. 2836 § 1, 2007; Ord. 2296 § 11, 1999; Ord. 817 § 1 (part), 1975; prior code § 7-19.9).
12.12.110 Violation; enforcement. A violation¶
of this chapter shall be enforced as provided for in Chapter 1.10 of the Tuolumne County Ordinance Code. (Ord. 2296 § 5, 1999; Ord. 817 § 1 (part), 1975; prior code § 7-19.8).
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