Local zoning · Merced County

Merced County — Zoning

Zoning under the Merced County local zoning and planning code, with the controlling citations.

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Last reviewed: July 6, 2026

Overview

Merced County’s zoning rules live in the Merced County Zoning Code (Title 18) and apply only in the unincorporated areas. Every parcel carries a base zoning district on the County’s Official Zoning Map, which controls what you can build and how big it can be. Article 2 groups districts into Agricultural, Residential, Commercial/Mixed-Use, Industrial, and “Other” (PD/SPZ) categories, each with its own use lists and development standards (§ 18.06.020; § 18.06.030 ). For a project, you’ll also need to consider countywide development standards, parking, landscaping, and any design review triggers.

Plain-English rule of thumb: Your parcel’s base zone on the “Zoning Map for Merced County” governs your allowed uses and dimensional limits; if the zone boundary is unclear, the Planning Director decides the precise line using the map scale (§ 18.06.030; § 18.06.050 ).

How zoning is organized in unincorporated Merced County

  • Title 18 applies to all uses and development in the unincorporated areas (§ 18.02.030 ).
  • Base zones and their symbols (e.g., A-2, R-1, C-2, M-1, MU) are established in Table 1-1; each corresponds to General Plan land-use designations and lists either allowable density (DU/AC) or intensity (FAR) (§ 18.06.020, Table 1-1 ).
  • The Official Zoning Map is adopted by reference; amendments require hearings and a Board-adopted ordinance (§ 18.06.030; § 18.142.010–.030 ).
  • Some standards vary when a site abuts housing (e.g., extra setback and wall for commercial next to residential), and some uses have specific standards in Article 4 (§ 18.14.040(A); § 18.60.xxx ).
  • Separate pages cover Overlay Districts, Nonconforming Uses, and Variances and Exceptions.

Quick reference table: common dimensional standards (unincorporated areas)

Zone Minimum Parcel Front Setback Side Setback (int./street) Rear Setback Height Code Reference
A-1 (General Agriculture) 20 acres 20 ft 15 ft / 20 ft (corner) 25 ft — § 18.10.030, Table 2-2; § 18.10.040(M)
A-2 (Exclusive Agriculture) 160 acres 20 ft 15 ft / 20 ft (corner) 25 ft — § 18.10.030, Table 2-2; § 18.10.040(M)
R-R (Rural Residential, w/o pub. utilities) 1 net ac 50 ft 15 ft / 50 ft 25 ft — § 18.12.030, Table 2-4
R-1 (Single-Family) 6,000 sf (interior) 20 ft 5 ft / 20 ft 15 ft — § 18.12.030, Table 2-4
R-1-5000 (Small-lot SF) 5,000 sf 15 ft 5 ft / 15 ft 15 ft — § 18.12.030, Table 2-4
R-2/R-3/R-4 (Multi-Family) 6,000 sf 20 ft 5 ft (12 ft for 2-story next to SF) / 20 ft 15 ft — § 18.12.030, Table 2-4; § 18.12.040(B)
M-H (Single-Family Mobile Home) 4,000 sf 10 ft 3 ft / 10 ft 5 ft 30 ft (parks) § 18.12.030, Table 2-4; § 18.60.110(G)–(I)
C-1 (Neighborhood Commercial) none 10 ft 0 ft / 10 ft 0 ft 35 ft § 18.14.040(A), Table 2-6
C-2 (General Commercial) none 6 ft 0 ft / 6 ft 0 ft 75 ft § 18.14.040(A), Table 2-6
MU (Mixed-Use) none 5 ft 0 ft / 10 ft 0 ft 50 ft § 18.14.040(A), Table 2-6
B-P (Business Park) 8,000 sf 15 ft 0 ft / 10 ft 0 ft — § 18.16.030, Table 2-8
M-1 / M-2 (Industrial) 10,000 sf 15 ft 0 ft / 10 ft 0 ft — § 18.16.030, Table 2-8

Note: Where commercial sites abut residential, a 10 ft minimum side/rear yard plus a 6 ft masonry wall is required (§ 18.14.040(A)(1)(a)–(b) ). Multi-family next to single‑family has a 12 ft side setback for two-story elements (§ 18.12.040(B) ).

District-by-district guide (unincorporated areas)

Agricultural zones

  • A-1 (General Agriculture) — Purpose: support intensive farming close to urban areas; parcels as small as 20 acres allowed where consistent. Typical allowed uses include agriculture and accessory ag structures by-right; agricultural processing with an Administrative Permit; and animal confinement facilities subject to windshed rules (§ 18.10.010(A); § 18.10.020, Table 2-1; § 18.10.030, Table 2-2 ). Key standards: min parcel 20 acres; setbacks 20 ft front, 15 ft side (20 ft corner), 25 ft rear (§ 18.10.030; § 18.10.040(M) ). Where applied: agricultural designations in the General Plan; see Zoning Map (§ 18.06.030 ).

  • A-1-40 (General Agriculture, 40-acre min) — Purpose: support broader ag operations with 40-acre minimums (§ 18.10.010(B) ). Uses/standards generally match A‑1; key standard is 40-acre minimum parcel (§ 18.10.030, Table 2-2 ).

  • A-2 (Exclusive Agriculture) — Purpose: very large-parcel agriculture and open space functions, often foothill/wetlands; 160-acre minimum (§ 18.10.010(C); § 18.10.030, Table 2-2 ). Wind-shed separation rules apply to animal confinement (§ 18.10.020(C) ).

  • Ag housing note: one “additional residential unit” may be allowed on large ag parcels subject to occupancy (farmer/family) and size limits, or see Chapter 18.62 for ADUs where public utilities are available (§ 18.60.080; cross‑reference § 18.62 ). For state ADU rules, also see California ADU law.

Residential zones

  • R-R (Rural Residential) — Semi-rural lots, often on well/septic. Key standards: with no public utilities, min parcel 1 net acre; front setback 50 ft; sides 15 ft (50 ft street); rear 25 ft (§ 18.12.030, Table 2-4 ). One “additional residential unit” may be allowed on well/septic under § 18.60.080 (separate from ADUs) (§ 18.60.080 ).

  • R-1 (Single-Family Residential) — Urban single‑family neighborhoods. Typical use: one single‑family dwelling per parcel; garages/carports must clear 20 ft to right‑of‑way (§ 18.12.030; additional garage frontage rule in § 18.12.040(B) ). Standards: 6,000 sf interior lot; front 20 ft; side 5 ft; rear 15 ft (§ 18.12.030, Table 2-4 ).

  • R-1-5000 (Small-lot Single-Family) — Slightly higher density SF. Standards: 5,000 sf lot; front 15 ft; side 5 ft; rear 15 ft; garages/carports: 20 ft to ROW (§ 18.12.030, Table 2-4; § 18.12.040(B) ).

  • Fox Hills special single‑family districts: R-1-4500 and R-1-1600 are used within the Fox Hills Community Specific Plan; these tailor minimum lot dimensions and setbacks for compact SF forms (e.g., R‑1‑1600 allows parcels as narrow as 22 ft x 80 ft) (§ 18.12 purpose statements excerpt ). Verify with the jurisdiction for parcel‑specific standards in the Specific Plan.

  • R-2 / R-3 / R-4 (Multi-Family) — Multi‑unit neighborhoods at medium to high density (§ 18.06.020, Table 1-1 DU/AC ranges ). Standards: front 20 ft; interior side 5 ft (but 12 ft if two stories and adjacent to single‑family); rear 15 ft (§ 18.12.030, Table 2-4; § 18.12.040(B) ). Objective form standards apply in some cases (e.g., multi‑family facade, stories, placement) (§ 18.12 objective standards excerpts ). Landscaping buffers are required within front setbacks in multi‑family zones (§ 18.36.050(F), Table 3‑6 ).

  • M-H (Single-Family Mobile Home Residential) — For manufactured/tiny homes; typical setbacks: front 10 ft, interior side 3 ft, rear 5 ft; mobile home park height max 30 ft (§ 18.12.030, Table 2-4; § 18.60.110(G)–(I) ).

Commercial and mixed-use zones

  • Overall purpose: provide neighborhood through highway-serving retail/services and mixed-use centers, with compatibility to housing (§ 18.14.010 ). Table 2‑6 sets core standards.

  • C-P (Commercial-Professional Office) — Small‑scale offices/personal services at neighborhood edges; front setback 10 ft; height 35 ft (§ 18.14.010(B)(1); Table 2‑6 ).

  • C-1 (Neighborhood Commercial) — Day‑to‑day retail/services; setbacks 10/0/10 (front/interior side/street side); height 35 ft (§ 18.14.010(B)(2); Table 2‑6 ).

  • C-2 (General Commercial) — Community/regional retail; front 6 ft; 0 ft interior sides; height 75 ft (§ 18.14.010 purpose excerpt; Table 2‑6 ).

  • C-3 (Heavy Commercial) — Higher-intensity commercial; front 15 ft; height 75 ft (Table 2‑6; see adjacency rules below) (§ 18.14.040(A), Table 2‑6 ).

  • H-I-C (Highway Interchange Center) — Highway-oriented centers; front 15 ft; height 60 ft (Table 2‑6 ).

  • MU (Mixed-Use) — Combines residential (4–33 DU/AC) with commercial (FAR 0.60); front 5 ft; height 50 ft (Table 1‑1; Table 2‑6 ).

  • Adjacency to housing: If a commercial site abuts a residential zone, minimum 10 ft side/rear setback plus a 6 ft masonry wall is required (§ 18.14.040(A)(1)(a)–(b) ). Dwelling units in commercial zones follow R‑1 setbacks (§ 18.14.040(A)(1)(c) ). See Signage, Landscaping and Screening, and Parking chapters for cross-cutting standards.

Industrial zones

  • B-P (Business Park) — Flexible office/R&D/light industrial; min parcel 8,000 sf; front 15 ft; 0 ft interior sides; 10 ft street side (Table 2‑8 § 18.16.030 ).

  • M-1 (Light Manufacturing) and M-2 (General Manufacturing) — Industrial districts with identical basic setbacks to B‑P; min parcel 10,000 sf (Table 2‑8 § 18.16.030 ). Additional landscaping screens apply in front setbacks (§ 18.36.070; Table 3‑7 ).

Other districts used in specific plan areas

  • PD (Planned Development) — Implements a range of residential, commercial, or industrial intensities per Table 1‑1; project‑specific standards apply. Not found in retrieved materials for district‑specific dimensional tables; Verify with the jurisdiction (§ 18.06.020, Table 1‑1 ).

  • SPZ (Special Planning Zone) — Used in the Fox Hills Community Specific Plan for kit fox mitigation corridors; function is resource protection rather than development (§ purpose excerpts ).

  • Fox Hills mixed-use special district: CMU (Commercial Mixed-Use) appears in Fox Hills materials, encouraging vertical/horizontal mix of commercial with residential up to medium densities; use Specific Plan standards where applicable (purpose excerpts; Verify with the jurisdiction ).

Using the Zoning Map (unincorporated areas)

  • The Official Zoning Map shows boundaries and symbols; other adopted maps (e.g., setback/height maps) may also apply (§ 18.06.030 ).
  • If a street is vacated, zone lines adjust to the new property line; if a boundary roughly follows a lot or street line, that line is the zone boundary (§ 18.06.040; § 18.06.050(A)–(B) ).
  • To change zoning, a Zoning Map Amendment is required, with Commission and Board hearings; it must be consistent with the General Plan (§ 18.142.010–.030 ).

Ties to other countywide standards

  • Landscaping buffers in residential and non-residential front setbacks are required by § 18.36.050(F) and § 18.36.070 (see Table 3‑6/3‑7) (§ 18.36.050(F); § 18.36.070 ).
  • Many uses have specific standards in Article 4 (e.g., convenience stores, emergency shelters, mobile home parks) (§ 18.60.xxx ).
  • Manufactured dwellings in residential zones must meet appearance and siting criteria (§ 18.60.100 ).
  • Building safety is governed separately by the California Building Standards Code.

Checklist

  • Confirm your parcel’s base zone on the Official Zoning Map and whether any Overlay Districts apply (§ 18.06.030 ).
  • Verify allowable uses in your zone (Article 2 use tables; Article 4 standards). For ag/residential “additional residential units,” see § 18.60.080 and Chapter 18.62 (ADUs) (§ 18.60.080 ).
  • Check dimensional standards: minimum parcel size, setbacks, height, FAR/DU/AC (Tables 2‑2, 2‑4, 2‑6, 2‑8) (§ 18.10.030; § 18.12.030; § 18.14.040(A); § 18.16.030 ).
  • Apply adjacency rules where non-residential abuts housing (e.g., 10 ft setback + 6 ft masonry wall) (§ 18.14.040(A)(1)(a)–(b) ).
  • Confirm parking, landscaping, signage, and other cross-cutting standards.
  • Determine if design review applies to your project type or location.
  • If your project needs a rezone, follow the amendment procedures (§ 18.142.010–.030 ).
  • For edge cases (older uses/structures), check Nonconforming Uses before planning upgrades.

Risks & Ambiguities

Issue Why it matters What to verify
Unclear zone boundary line Controls what uses/standards apply Director’s boundary determination process (§ 18.06.050) and the Zoning Map scale (§ 18.06.050(B))
Commercial next to housing Triggers extra setbacks/walls 10 ft side/rear and 6 ft masonry wall rule (§ 18.14.040(A)(1)(a)–(b))
Two-story multi-family next to SF Increases side setback to 12 ft § 18.12.040(B) multi-family adjacency standard
Ag housing vs. ADU Different pathways, occupancy limits § 18.60.080 “additional residential units” vs. Chapter 18.62 (ADUs) (§ 18.60.080)
Specific Plan districts (Fox Hills) Localized standards may supersede Fox Hills-only districts (R‑1‑4500, R‑1‑1600, CMU, SPZ). Verify with the jurisdiction (§ excerpts)
Minimum parcel sizes in ag splits Affects subdivision feasibility Ag Table 2‑2 and required findings (§ 18.10.030(D))

Plain-English Summary

In the unincorporated areas, look up your parcel’s zone on the Merced County Zoning Map and then apply the matching use list and standards from Title 18. For example, an R‑1 lot usually needs a 20 ft front and 5 ft side setback, while a C‑2 site can build closer to the street but must buffer next to homes. Agriculture has large minimum parcel sizes (20–160 acres) and special rules for animal facilities and farm housing. From there, layer in parking, landscaping, and any design review requirements—separate from the California Building Standards Code that governs construction.

Source References

  • Title 18 Zoning Code: § 18.02.010–.030 (applicability/purpose)
  • Establishment of zones and Zoning Map: § 18.06.020–.050; Table 1‑1
  • Agricultural purposes, uses, and standards: § 18.10.010–.040; Table 2‑1; Table 2‑2
  • Residential standards and selected rules: § 18.12.030–.040; Table 2‑4; selected objective standards excerpts
  • Commercial purposes and standards: § 18.14.010; § 18.14.040(A); Table 2‑6
  • Industrial standards: § 18.16.030; Table 2‑8
  • Landscaping buffers: § 18.36.050(F); § 18.36.070; Table 3‑6/3‑7
  • Additional residential units in ag/R‑R: § 18.60.080 (and ref. to Ch. 18.62)
  • Zoning/General Plan/Map amendments: § 18.142.010–.030
  • Fox Hills special districts (excerpts): R‑1‑4500, R‑1‑1600, CMU, SPZ

Sources

Retrieved passages

  • Merced County Zoning Code (§ 2) High relevance
  • Merced County Zoning Code (§ 2) High relevance
  • Merced County Zoning Code High relevance
  • Merced County Zoning Code (§ 2) High relevance
  • Merced County Zoning Code (§ 2) High relevance
  • Merced County Zoning Code (§ 2) High relevance
  • Merced County Zoning Code (§ 2) High relevance
  • Merced County Zoning Code (§ 2) High relevance
  • Merced County Zoning Code High relevance
  • Merced County Zoning Code (§ 2) High relevance
  • Merced County Zoning Code (§ 2) High relevance
  • Merced County Zoning Code (§ 2) Medium relevance

Cited sections

Frequently asked questions

What can I build on an R-1 lot in Merced County?

Single-family homes are the typical use in the R‑1 zone. Typical minimums are a 6,000 sf lot, a 20 ft front setback, 5 ft side setback, and 15 ft rear setback; garages/carports facing the street must be 20 ft from the right‑of‑way (§ 18.12.030 Table 2‑4; § 18.12.040(B) ). Verify any accessory uses and site-specific overlays with the County.

How big does my agricultural parcel need to be if I subdivide?

In unincorporated areas, A‑1 requires 20 acres per new parcel, A‑1‑40 requires 40 acres, and A‑2 requires 160 acres; the County must also make specific subdivision findings to protect agriculture (§ 18.10.030, Table 2‑2 and § 18.10.030(D) ).

I own commercial property next to homes—are there extra buffers?

Yes. When a commercial parcel abuts a residential zone, provide at least a 10 ft side or rear setback at the shared edge and build a 6 ft masonry wall (§ 18.14.040(A)(1)(a)–(b) ).

What are the setbacks for multi-family housing?

For R‑2/R‑3/R‑4, front setbacks are typically 20 ft and interior sides 5 ft; if a building is two stories and adjacent to single‑family zoning, the side setback increases to 12 ft (§ 18.12.030 Table 2‑4; § 18.12.040(B) ).

Can I add a second home on my rural residential or agricultural lot?

Possibly. The County allows “additional residential unit(s)” under § 18.60.080 in R‑R and agricultural zones with well/septic, subject to size, occupancy, and environmental health approvals; ADUs under Chapter 18.62 may apply on parcels served by public utilities (§ 18.60.080 ).

How do I find or change my zoning?

Use the Official Zoning Map to confirm your zone; to rezone, file a Zoning Map Amendment that is consistent with the General Plan and proceeds to Commission/Board hearings (§ 18.06.030; § 18.142.010–.030 ).

Are there special rules for industrial landscaping?

Yes. Non-residential front setback landscaping applies in B‑P, M‑1, and M‑2 zones; see § 18.36.070 and Table 3‑7 for required screening and plantings (§ 18.36.070 ).

What if my lot is split by a zone boundary?

If a zone boundary approximately follows a lot or street line, that line is the boundary; where uncertainty remains, the Director determines the exact location using the map scale (§ 18.06.050(A)–(B) ).

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