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Merced County · Building on your lot

Sheds, garages and other accessory structures in Merced County

Nonexempt residential accessory structures are limited to 15 feet, or more with an administrative permit, and never above the main building. Nonexempt accessory structures may cover at most 15% of the rear yard, and at most 600 square feet on parcels under one-quarter acre.

Key points

  • Accessory height: Nonexempt residential accessory structures are limited to 15 feet, or more with an administrative permit, and never above the main building.
  • Accessory size: Nonexempt accessory structures may cover at most 15% of the rear yard, and at most 600 square feet on parcels under one-quarter acre.

Each rule below links to the section of the Merced County Municipal Code it was read from, with the code text one click away (checked October 2026). General information, not legal advice.

What Merced County's code says

Merced County code What Merced County's code adds
Maximum height
  • At most 15 feet tall, and no taller than the main building.
    Applies: Applies to nonexempt residential accessory structures; over 15 feet needs Director approval by administrative permit.
    § 18.32.030 · code text
    Accessory structures shall be limited to 15 feet in height.
Size or lot coverage
  • At most 600 square feet.
    Applies: Applies to nonexempt accessory structures on residential parcels under ¼ acre.
    § 18.32.030 · code text
    No accessory structure shall exceed 600 square feet on a parcel less than one-quarter acre.
  • At most 15% of the rear yard.
    Applies: Applies to nonexempt accessory structures in residential zones.
    § 18.32.030 · code text
    Accessory structures shall not occupy more than 15% of the rear yard; nor shall accessory structures plus the main structures on any site occupy more than the maximum parcel coverage as specified for the zone in which the parcel is located.
  • Total coverage: 40% R-R without utilities; 60% serviced R-R, R-1, R-1-5000; 70% R-2, R-3, R-4; 80% M-H.
    Applies: Applies to nonexempt accessory and main structures together, as the maximum parcel coverage.
    § 18.12.030 · code text
    § 18.12.030. Residential Zone Development Standards. A. Table 2-4 Residential Zone Development Standards. The intent of the residential zone development standards table is to clearly and precisely establish the basic site and structure regulations that apply to all developments in each of the residential zones. The table also indicates where additional site and structure requirements, including, but not limited to, off-street parking, landscaping, signing, fences and obstructions, and performance standards, apply to residential zones. B. Increased Setbacks Use Permits. The setbacks listed below may be increased for those uses requiring an Administrative or Conditional Use Permit when it is determined by the commission or director, as applicable, that increased setbacks are necessary to make the use compatible with surrounding properties and uses. C. Density. Maximum density standards shall be consistent with the General Plan or applicable community plan. D. Zoning Map. The boundaries, designations, and locations of the zones established by this Zoning Code shall be shown on the map(s) entitled "Zoning Map for Merced County" and referred to in this Zoning Code as the Zoning Map. Any additional maps (e.g., setback map) adopted shall also be a part of this Zoning Code by reference. This Zoning Code, together with the Zoning Map, is hereby adopted in compliance with current state planning, zoning, and development laws. Changes in the boundaries of any identified zones shall be made by ordinance in compliance with Chapter 18.142 (Amendments). Table 2-4 Residential Zone Development Standards | Development Feature (minimum unless otherwise indicated) | R-R (no public sewer/water) | R-R (with public sewer/water) | R-1 | R-1-5000 | R-2/R-3/R-4 | M-H | Additional Regulations | | --- | --- | --- | --- | --- | --- | --- | --- | | Parcel Area (minimum square feet) area required for each NEWLY CREATED parcel. | Parcel Area (minimum square feet) area required for each NEWLY CREATED parcel. | Parcel Area (minimum square feet) area required for each NEWLY CREATED parcel. | Parcel Area (minimum square feet) area required for each NEWLY CREATED parcel. | Parcel Area (minimum square feet) area required for each NEWLY CREATED parcel. | Parcel Area (minimum square feet) area required for each NEWLY CREATED parcel. | Parcel Area (minimum square feet) area required for each NEWLY CREATED parcel. | Parcel Area (minimum square feet) area required for each NEWLY CREATED parcel. | | Interior Parcel | 1 net ac. | 14,520 | 6,000 | 5,000 | 6,000 | 4,000 | § 18.12.040A | | Corner Parcel | 1 net ac. | 14,520 | 6,400 | 6,000 | 6,400 | 4,500 | § 18.12.040A | | Parcels Shall Front a Publicly Maintained Street | No | No | Yes | Yes | Yes | Yes | § 18.12.040A | | Setbacks (minimum). Property lines are measured in feet, with those adjacent to the street measured from the face of the curb, adopted plan line, or edge of right-of-way. | Setbacks (minimum). Property lines are measured in feet, with those adjacent to the street measured from the face of the curb, adopted plan line, or edge of right-of-way. | Setbacks (minimum). Property lines are measured in feet, with those adjacent to the street measured from the face of the curb, adopted plan line, or edge of right-of-way. | Setbacks (minimum). Property lines are measured in feet, with those adjacent to the street measured from the face of the curb, adopted plan line, or edge of right-of-way. | Setbacks (minimum). Property lines are measured in feet, with those adjacent to the street measured from the face of the curb, adopted plan line, or edge of right-of-way. | Setbacks (minimum). Property lines are measured in feet, with those adjacent to the street measured from the face of the curb, adopted plan line, or edge of right-of-way. | Setbacks (minimum). Property lines are measured in feet, with those adjacent to the street measured from the face of the curb, adopted plan line, or edge of right-of-way. | Setbacks (minimum). Property lines are measured in feet, with those adjacent to the street measured from the face of the curb, adopted plan line, or edge of right-of-way. | | Front | 50 | 30 | 20- Garage 15- Livable Area | 20- Garage 15- Livable Area | 20 | 10 | § 18.12.040(A) & B | | Side (interior side) | 15 | 10 | 5 | 5 | 5/12 | 3 | § 18.12.040B | | Side (facing street) | 50 | 30 | 20 | 20- Garage 15- Livable Area | 20 | 10 | | | Rear | 25 | 20 | 10 | 10 | 15 | 10 | § 18.12.040B | | Parcel Depth, Width, and Coverage (maximum) area measured in feet | Parcel Depth, Width, and Coverage (maximum) area measured in feet | Parcel Depth, Width, and Coverage (maximum) area measured in feet | Parcel Depth, Width, and Coverage (maximum) area measured in feet | Parcel Depth, Width, and Coverage (maximum) area measured in feet | Parcel Depth, Width, and Coverage (maximum) area measured in feet | Parcel Depth, Width, and Coverage (maximum) area measured in feet | Parcel Depth, Width, and Coverage (maximum) area measured in feet | | Parcel Width at Front Parcel Line (interior parcel) | 125 | 80 | 60 | 50 | 60 | 40 | | | Parcel Width at Front Parcel Line (corner parcel) | 125 | 80 | 65 | 60 | 65 | 50 | | | Parcel Width at Front Parcel Line (cul-de-sac or bulb connection parcel) | 60 | 50 | 45 | 40 | 45 | 35 | | | Minimum Parcel Depth | None | None | 100 | None | 100 | 80 | | | Maximum Depth: Width Ratio | 3:1 | 3:1 | 3:1 | 3:1 | 3:1 | 3:1 | | | Maximum Structure Coverage (percentage) | 40 | 60 | 60 | 60 | 70 | 80 | | | Height (maximum) measured in feet | Height (maximum) measured in feet | Height (maximum) measured in feet | Height (maximum) measured in feet | Height (maximum) measured in feet | Height (maximum) measured in feet | Height (maximum) measured in feet | Height (maximum) measured in feet | | Height (main structure) | 35 | 30 | 30 | 30 | R-2:45 R-3:60 R-4:60 | 15 | | | Height (accessory structure) | 35 | 15 | 15 | 15 | 15 | 15 | | | Additional Regulations | Additional Regulations | Additional Regulations | Additional Regulations | Additional Regulations | Additional Regulations | Additional Regulations | Additional Regulations | | Accessory Structures | Accessory Structures | Chapter 18.32 | Chapter 18.32 | Chapter 18.32 | | | | | Additional Dwelling Units | Additional Dwelling Units | Chapter 18.62 | Chapter 18.62 | Chapter 18.62 | | | | | Animal Confinement Facilities | Animal Confinement Facilities | Chapter 18.64 | Chapter 18.64 | Chapter 18.64 | | | | | Fences, Walls, and Hedges | Fences, Walls, and Hedges | Chapter 18.34 | Chapter 18.34 | Chapter 18.34 | | | | | Landscaping | Landscaping | Chapter 18.36 | Chapter 18.36 | Chapter 18.36 | | | | | Off-Street Parking Regulations and Design Standards | Off-Street Parking Regulations and Design Standards | Chapter 18.38 | Chapter 18.38 | Chapter 18.38 | | | | | Performance Standards | Performance Standards | Chapter 18.40 | Chapter 18.40 | Chapter 18.40 | | | | | Sign Regulations | Sign Regulations | Chapter 18.44 | Chapter 18.44 | Chapter 18.44 | | | | | Solid Waste and Recycling Materials Storage | Solid Waste and Recycling Materials Storage | Chapter 18.46 | Chapter 18.46 | Chapter 18.46 | | | | (Ord. 1976 § 2, 2019; Ord. 1990 § 1, 2020; Ord. 2039, 5/21/2024; Ord. 2062, 6/2/2026)
Side and rear setback
  • At least 5 feet rear setback.
    Applies: Applies to nonexempt accessory structures in residential zones.
    § 18.32.030 · code text
    The minimum rear setback shall be five feet.
  • At least 5 feet side setback.
    Applies: Applies to nonexempt accessory structures on interior residential parcels.
    § 18.32.030 · code text
    If the parcel is an interior parcel, the minimum setback shall be five feet.
  • At least 3 feet from side and rear property lines.
    Applies: Applies to residential decks and platforms; tall decks or those with listed features within 5 feet of the house follow house setbacks.
    § 18.32.030 · code text
    decks, and platforms shall be located at least three feet from any rear or side property lines.

Who this affects

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Frequently asked questions

How big can a shed or accessory building be in Merced County?

Nonexempt residential accessory structures are limited to 15 feet, or more with an administrative permit, and never above the main building. Nonexempt accessory structures may cover at most 15% of the rear yard, and at most 600 square feet on parcels under one-quarter acre.

General information, not legal advice.

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