Tuolumne County Zoning, Planning & Building Codes

Last reviewed: July 3, 2026

Overview

The County's land-use rules for unincorporated Tuolumne County are codified in the Tuolumne County Uniform Zoning Ordinance (Title 17), which organizes permitted uses, development standards, and procedures that apply only to the County's unincorporated areas (§ 17.02.010). The Title is intended to implement the General Plan and to promote public health, safety, and welfare in unincorporated Tuolumne County (§ 17.02.020).

This orienting page explains where to find key rules in the local code, the County’s zoning district families, how major development standards (height, setbacks, lot coverage, parking) are set, the principal overlay/special-purpose districts, the normal building‑permit / discretionary review path, and how state housing laws (ADUs, density bonus, etc.) interact with Title 17. For detailed text use the County's zoning menu; start with the County’s zoning and land‑use pages.

How Tuolumne County's code is organized

• Title name and scope — The ordinance is titled the "Tuolumne County Uniform Zoning Ordinance" and applies to unincorporated areas; it is adopted under state authority and must be consistent with the General Plan (§ 17.02.010; § 17.02.060; § 17.02.070).
• Articles and chapters — Title 17 is arranged into Articles and Chapters. Key Articles include: Article 1 (General Provisions, e.g., § 17.02), Article 2 (Zoning Districts and Allowable Uses, e.g., §§ 17.10–17.20), Article 3 (Development Standards, e.g., §§ 17.22–17.34), Article 4 (Standards for Specific Uses, e.g., § 17.36 for ADUs), and Article 5 (Common Procedures, § 17.98).
• Who administers it — Administration and decision roles are assigned to the Board of Supervisors, the Planning Commission, and the Community Development Director, according to the approval‑authority rules in Chapter § 17.96 and the procedural rules in § 17.98.

How to navigate the code quickly: look up the Article/Chapter in the Title 17 table of contents (e.g., §§ 17.10–17.20 for district chapters; § 17.22 for standards; § 17.30 for parking; § 17.36 for accessory dwelling units) and then the specific section numbers cited here.

Zoning district families

Tuolumne County groups zones by purpose. The primary district families are set out in Article 2 and include:

• Agriculture & Open Space (see § 17.10) — agricultural and resource zones are described in Chapter 17.10.
• Residential (see § 17.12) — residential districts include R‑1, R‑2, R‑3, and a series of RE (Residential Estate) zones such as RE‑1, RE‑2, RE‑3, RE‑5, and RE‑10; purposes and minimum parcel/servicing rules are in § 17.12.010–.090 (for example R‑1 purpose and minimum parcel size rules are in § 17.12.020).
• Commercial & Mixed‑Use (see § 17.14) — commercial and mixed‑use districts and their allowable uses are in Chapter 17.14.
• Industrial (see § 17.16) — industrial districts and standards are in Chapter 17.16.
• Special Purpose / Combining Districts (see § 17.18 and § 17.20) — includes combining districts such as the Historic Combining (H), Historic Design Preservation (HDP), Planned Unit Development (:PD), Airport (:AIR), Agricultural Preserve (:AP), and others; rules for combining‑district modifications and special permit requirements are in Chapter 17.20.

Practical note: permitted uses and the level of review (ministerial vs. conditional/use permit) for a specific parcel are determined by the parcel’s zone (see the use tables referenced in each district chapter, e.g., the R‑1 allowed uses table is in § 17.12.020).

Citywide development standards

Tuolumne County centralizes cross‑cutting development rules in the "Standards for All Development" article and several chapters:

• Height — Default height limits are set by district; many residential and open space districts are limited to 40 ft and many commercial/industrial and some higher‑density residential districts are limited to 50 ft unless otherwise provided (§ 17.22.020).
• Parcel, yards, and setbacks — Yard, setback, and parcel dimension rules (front/side/rear setbacks, minimum lot sizes, and related parcel standards) are in § 17.22.030 and in the individual district chapters that provide parcel‑specific minima (§ 17.22.010–.030; district chapters such as § 17.12 for residential).
• Lot coverage and FAR — Maximum site coverage and floor‑area regulations are stated either in the district chapters or in the Planned Unit Development (:PD) rules where custom intensity is approved; Article 3 and the PD provisions allow adjustments to coverage/FAR through approved permits (§ 17.20.060; § 17.22).
• Parking — Off‑street parking standards are codified in Chapter § 17.30; small‑lot subdivision guidance and parking minimums for residential units (e.g., 1 space for studios/1‑bed and 2 spaces for two‑bedroom and larger units in small‑lot subdivisions) are specified in § 17.25.060.G. The County's parking page is the natural next stop for dimensional and ratio rules.
• Fences, landscaping, screening, garages, and transparency — these elements are specifically referenced in the development standards chapter and in accessory / use‑specific chapters (see § 17.22 and the later standards chapters such as § 17.30 and § 17.34 for signs).

For objective vs. discretionary deviation: the code provides a Minor Modification procedure for limited departures from development standards (application/approval rules and findings are in the Minor Modification provisions) and disallows modification of certain core standards like residential density, lot area, or maximum FAR (§ 17.100.* as implemented and the Minor Modification criteria shown in § 17.100.090.B).

Linking to local guidance: consult the County’s Development Standards page for design checklists and the Landscaping and Screening page referenced in the code. (§ 17.22 and related district chapters).

Specific plans & overlays

• Specific plans / planned districts — The County uses Planned Unit Development (:PD) combining districts and permits to establish site‑specific rules that supersede standard district limits where approved; the PD rules allow modification of height, FAR, parking, signage, and parcel layout through a Planned Unit Development Permit (§ 17.20.060).
• Historic overlays — The Historic (H) and Historic Design Preservation (HDP) combining districts apply additional controls on demolition, relocation, and exterior alteration and may modify certain development standards when a use permit is obtained; the County allows application of the State Historical Building Code in H districts and requires use permits for demolition or relocation in many cases (§ 17.20.020; § 17.20.060 and related H‑district rules). The County’s overlay districts and historic preservation pages summarize these local combining district rules.
• Airport and other combining districts — The Airport (:AIR) combining district implements the Airport Land Use Compatibility Plan and imposes use and safety constraints in airport influence areas (§ 17.20.010 et seq.).

Building permits & review

• Permit types and process — The County distinguishes ministerial permits (building permits) from discretionary land‑use entitlements (use permits, variances, site development permits). Common procedures for application, completeness, environmental review (CEQA), notices, and time limits are in § 17.98, which prescribes application submittal, fees, environmental review, and authority delegation.
• Approval authorities — Who decides: the Community Development Director, Planning Commission, or Board of Supervisors are assigned duties and final authority depending on the permit type; the approval authorities and appeal paths are set in § 17.96 and in the approving‑authority tables referenced there (§ 17.96.010 et seq.).
• Typical review route — Most projects start with an application to the Director under § 17.98.050. Discretionary projects undergo environmental review per § 17.98.060 and, depending on the permit, will be heard by the Planning Commission or Board (appeals available). Fees, submittal checklists, and pre‑application guidance are required by § 17.98.050.
• Inspections and code compliance — The County performs pre‑approval and post‑approval inspections; building permits cannot be issued if the project conflicts with Title 17 and other County ordinances (§ 17.98.030; § 17.02.060).
• Relationship to the California Building Standards Code (Title 24) — Building permits and construction must comply with the State building code; the County references and enforces Title 24 through its building permit process (see the County's California Building Standards Code resource and the permit requirements in § 17.98).

Practical path for most residential projects: confirm zone/use in the district chapter (e.g., § 17.12 for residential), confirm objective development standards in § 17.22 and the district table, submit a complete application per § 17.98.050, and obtain building/grading permits after any discretionary approvals and CEQA clearance (§ 17.22; § 17.98).

State housing law in Tuolumne County

Tuolumne County's Title 17 expressly acknowledges and integrates state housing laws where applicable:

• ADUs / JADUs — Title 17 includes a chapter for Accessory Dwelling Units (ADUs) at § 17.36; local ADU rules are implemented alongside state ADU statutes and the County cannot adopt standards that conflict with state ADU limits where state law preempts local rules (§ 17.36; see also the County's acknowledgement that state law controls conflicts) (§ 17.26.010). The County's ADU implementation should be read together with statewide ADU rules summarized by the California ADU law resource.
• Density bonus — The County maintains a density‑bonus chapter (Chapter § 17.26) that implements state density‑bonus law and states clearly that if any provision conflicts with state law, state law controls (§ 17.26.010–.020).
• SB 9 / lot splits and ministerial housing laws — Title 17 contains subdivision and small‑lot subdivision rules (see § 17.25) and has processes for small‑lot subdivisions including objective standards; where state ministerial housing laws apply they will interact with the County’s small‑lot and subdivision rules and the County notes that state statutes govern over conflicting local provisions (§ 17.25; § 17.02.030).
• Rent control / tenant protections — The County Code excerpts retrieved do not contain a local rent‑control ordinance; Title 17 focuses on land use rather than rent/tenant regulation (Not found in retrieved materials; verify with County offices). (Verify — not located in Title 17 excerpts).

Quick pointers:

• For ADU questions begin at § 17.36 and confirm which standards are local objective standards and which are governed by state ADU law (§ 17.36; § 17.26.010).
• For density bonus inquiries consult § 17.26.

Information Gaps (what I could not confirm from the retrieved Title 17 excerpts)

• The full, district‑by‑district numeric tables for front/side/rear setbacks and lot coverage by zone (the code references these standards in district tables, but the exact numeric setbacks and coverage figures for each zone were not fully visible in the retrieved excerpts). See § 17.22.030 and the district chapters for the missing numeric tables.
• Complete text of § 17.36 (Accessory Dwelling Units): the Title 17 TOC identifies this chapter but the detailed local ADU rules (size limits, standards, and any local objective design rules) were not included in the snippets I reviewed; review the full § 17.36 to confirm local ADU specifics.
• The full approving‑authority matrix (Table 17.96.1) and the complete Minor Modification section with all cross‑references: the TOC and excerpts refer to these items but the complete tables and some cross‑references are not present in the snippets I received. See § 17.96 and the Minor Modification provisions as indicated in the code.

If you want, I can extract the missing numeric tables (setbacks, lot coverage, parking dimensions, the full § 17.36 ADU text, and Table 17.96.1) from the uploaded zoning file or fetch the official County online ordinance to fill the gaps.

Source References

• Tuolumne County Uniform Zoning Ordinance (Title 17) — Table of contents and Articles listing (e.g., Article 1–5, Chapters 17.02–17.98) (§ 17.02.010; §§ 17.10–17.20; § 17.22; § 17.26; § 17.36; § 17.96; § 17.98)
• General provisions (short title, purpose, authority, scope) — § 17.02.010–.060.
• Residential districts and R‑1/R‑2/R‑3/RE zones — § 17.12.010–.090 (R‑1 specifics at § 17.12.020).
• Standards for all development (height, parcel/yard, accessory structures) — § 17.22.010–.060 (height rules at § 17.22.020).
• Small‑lot subdivision standards, including parking minima for units — § 17.25.060 (parking at § 17.25.060.G).
• Density bonus and affordable housing incentives — Chapter 17.26 (purpose and state‑law supremacy at § 17.26.010–.020).
• Combining / overlay district rules (Historic H, HDP, PD, Airport) — Chapter 17.20 (e.g., § 17.20.010; § 17.20.020; § 17.20.060).
• Common procedures: applications, completeness, CEQA and inspection rules — Chapter 17.98 (e.g., § 17.98.050 Applications and Fees; § 17.98.060 Environmental Review).
• Approval authorities (Board, Planning Commission, Director) and duties — Chapter 17.96 (§ 17.96.010 et seq.).