FENCE RULES – MOBILE (CITY), ALABAMA

OVERVIEW

Residential fences are permitted on private property within City of Mobile, subject to local regulations. For properties located outside City of Mobile municipal limits, fence rules depend on the applicable county, municipality, or governing authority for the property location.

Local fence rules appear in the Mobile City Code, the Unified Development Code, the City’s adopted residential building code, historic preservation requirements, floodplain and stormwater provisions, subdivision regulations, and Build Mobile administrative materials.

This page focuses on typical single-family residential fencing. If the jurisdiction’s adopted materials do not state a specific limit or requirement, this page notes that the code does not specify one.

Compiled From Mobile City Code, Unified Development Code, 2021 International Residential Code as adopted by City of Mobile, Chapter 21, Fences, Barricades and Similar Structures, Chapter 44, Article IV, Historic Preservation, Subdivision Regulations, and Build Mobile contact, forms, planning, permitting, inspections, engineering, and historic-development materials as of May 2026.

GOVERNANCE

The City of Mobile regulates residential fences through the Mobile City Code and the Unified Development Code. The City does not use one single fence-only chapter for all ordinary residential fence rules. Instead, fence requirements appear across zoning, adopted building-code context, permit-fee and permit-routing materials, historic review, stormwater and floodplain, subdivision, and right-of-way materials.

The Mobile City Code adopts the 2021 International Residential Code and appendices, with local amendments, as the Residential Building Code of the City of Mobile.

Build Mobile Planning and Zoning administers zoning, subdivision, Planning Commission, Board of Adjustment, and related land-use functions. Build Mobile Permitting and Predevelopment handles permit questions and plan submissions. Build Mobile Inspections handles building-code and construction questions.

Historic-district exterior work is administered through Build Mobile Historic Development, the Architectural Review Board, and the Mobile Historic Development Commission where Chapter 44 applies.

PERMIT AND APPROVAL REQUIREMENTS

• Residential Building Code Context: The Mobile City Code adopts the 2021 International Residential Code as the Residential Building Code of the City of Mobile. The adopted IRC includes a building-permit exemption for fences not over 7 feet high, unless a local amendment or separate City requirement applies. The Mobile code materials reviewed for this page do not identify a stricter City-wide building-permit threshold for ordinary residential fences or an amendment deleting that fence exemption.

• Exemption Framing: The 7-foot adopted-code figure is a building-permit exemption context, not a local zoning maximum height. It does not replace the Unified Development Code fence and wall limits for required front yards, required corner side yards, historic districts, dangerous materials, floodplain areas, easements, rights-of-way, or other site-specific conditions.

• Residential Fence Application Context: A Residential Fence Permit application appears in the City’s online permitting system. That application is administrative context only. The existence of the application is not treated here as an ordinance-level statement that every residential fence requires a building permit.

• Fence and Wall Fee Schedule Context: The Mobile City Code building-trades permit-fee schedule includes a Fence and wall fee category for construction of all fences or walls, with separate categories for projects where inspection is required and where no inspection is required. The fee schedule confirms that the City has an administrative fee category for fence and wall permit routing, but it is not treated here as a separate universal permit requirement for every standard residential fence.

• Zoning Compliance: Building-permit exemptions are separate from zoning, setback, or plat requirements. Confirm any applicable zoning conditions, setbacks, and plat requirements with Build Mobile Planning and Zoning before construction.

• Historic District Approval: In a designated local historic district, a Certificate of Appropriateness is required before a material exterior change. Chapter 44 defines material change to include erection, alteration, restoration, or removal of structures including walls and fences within a local historic district. A Certificate of Appropriateness must be obtained before receiving a City of Mobile building permit for outside work on property located within a local historic district.

• Floodplain Development Permit: Chapter 17 requires a floodplain development permit before development begins in identified special flood hazard areas and city-identified flood hazard areas within the City. This is not an ordinary fence-height rule, but it may affect fence work where the project is located in a regulated flood hazard area and qualifies as development under Chapter 17.

• Swimming Pool Enclosures: Chapter 21 contains a separate article for Enclosure of Swimming Pools and a section titled Fence or Wall, Generally. The code materials reviewed for this page do not specify a publishable residential pool-fence height or detailed barrier standard beyond identifying that separate pool-enclosure article.

FENCE PLACEMENT RULES

• Yard Location: The Unified Development Code lists fences, walls, poles, posts, and other customary yard accessories, ornaments, and furniture as allowed in any yard with no yard-encroachment restriction, subject to the City’s height, visibility, material, historic, floodplain, easement, right-of-way, and other applicable rules.

• Property Lines and Easements: The ordinance does not state a setback requirement for standard residential fences from property lines; however, fences must be located entirely on the owner’s property and must not encroach into rights-of-way or easements.

• Recorded Plats and Subdivision Conditions: Where a lot is affected by a subdivision plat, the Subdivision Regulations require final plats to show streets, rights-of-way, easements, utility rights-of-way, property lines, and minimum building setback lines. Recorded easements, utility rights-of-way, drainage easements, and plat conditions may affect where a fence can be placed on a specific lot.

• Drainage and Floodplain Context: Chapter 17 applies to structures and land within the City and includes stormwater and floodplain controls. Fence placement must not create a drainage obstruction, floodplain conflict, or other condition regulated under those provisions where Chapter 17 applies.

• Historic District Site Work: In a local historic district, fence placement, removal, replacement, or alteration can be reviewed as a material exterior change because Chapter 44 includes walls and fences within the historic material-change definition.

• Utility Safety: Alabama law requires notice through Alabama 811 before excavation where Alabama’s underground damage-prevention law applies. For fence projects that involve digging, including fence post holes, notice generally must be given within 2 to 10 full working days before excavation begins, not counting the day of notification.

FENCE HEIGHT AND VISIBILITY RULES

• Required Front Yard: A fence or wall that obstructs sight may not be erected or altered in any required front yard to exceed 3 feet in height.

• Beyond Required Front Yard: Except as specified in the design review guidelines for Mobile’s historic districts for sites in historic districts, any fence or wall beyond the required front yard may not exceed 8 feet in height.

• Corner Building Sites: On a corner building site having to its rear a building site facing toward the intersecting or side street, a fence or wall that obstructs sight may not be erected or altered in the required side yard to exceed 3 feet in height.

• Historic Districts: For sites in historic districts, fence and wall height may be affected by Mobile’s historic-district design review process. Chapter 44 requires Architectural Review Board approval before material exterior changes in local historic districts.

• Pool Enclosure Height: Chapter 21 identifies swimming-pool enclosure rules, but the code materials reviewed for this page do not specify a publishable residential pool-fence height standard.

MATERIAL AND CONSTRUCTION LIMITS

• Electrified, Barbed-Wire, and Dangerous-Material Fences: Electrified fences and fences composed of barbed wire or other dangerous materials may be permitted only in R-A, CW, B-3, B-5, I-1, I-2, ML, and MH districts upon approval of the Director. Applications for those fence materials will not be approved in any other district unless a variance is approved by the Board of Zoning Adjustment.

• Ordinary Residential Materials: Outside the specific dangerous-material rule, historic-district review, pool-enclosure context, and other applicable site-specific rules, the code does not specify one required material, finished-side orientation, opacity rule, or construction style for standard residential fences.

• Historic District Materials: In a local historic district, changes to fence materials, fence design, walls, and other exterior environmental or architectural features may require review through the Architectural Review Board before work proceeds.

• Nonresidential Buffer Rules: The Unified Development Code contains fence, wall, and screening standards for protection buffers and certain nonresidential or special-use contexts. Those standards are not treated here as ordinary single-family residential fence material rules unless the specific site or use is subject to them.

PRIVATE RESTRICTIONS

• Private Covenants and HOAs: Private covenants, deed restrictions, architectural controls, and HOA rules operate independently from the Mobile City Code and may be more restrictive than City requirements.

• Recorded Subdivision Restrictions: Where restrictive covenants or recorded plat conditions apply, those private or recorded restrictions may control fence placement, materials, height, color, style, or approval procedure even when the City code would allow the fence.

REVIEW AND ENFORCEMENT CONTEXT

Fence issues are typically reviewed during permit or approval review when required, and through complaint-based code enforcement. Examples include:

• Zoning Height Review: The 3-foot sight-obstruction limits for required front yards and certain required side yards, and the 8-foot limit beyond the required front yard, are zoning-based fence and wall limits under the Unified Development Code.

• Material Review: Electrified, barbed-wire, and other dangerous-material fences are reviewed under the listed-district and approval rules in the Unified Development Code.

• Historic Review: Fence or wall work in a local historic district may be reviewed by the Architectural Review Board as a material exterior change and may require a Certificate of Appropriateness before the City issues a building permit for outside work.

• Floodplain Review: Work in identified special flood hazard areas and city-identified flood hazard areas may require floodplain development review under Chapter 17.

• Subdivision, Easement, and Right-of-Way Review: Recorded plats, utility easements, drainage easements, private streets, rights-of-way, and subdivision conditions may affect fence placement on a specific property.

USING THIS INFORMATION

This page provides general orientation on how residential fence rules are structured and applied within City of Mobile, based on publicly available source materials reviewed as of May 2026.

In addition to local fence rules, certain Alabama laws apply statewide. See Statewide Fence Laws in Alabama.

It is not legal advice and does not replace official ordinances, permits, surveys, or professional guidance. Rules and interpretations may change, and application may vary based on zoning district, site conditions, easements, rights-of-way, floodplain status, rural or agricultural context, and private restrictions such as HOA covenants. Before purchasing materials or beginning construction, confirm current requirements and any site-specific limitations with Build Mobile Planning and Zoning, Build Mobile Permitting and Predevelopment, Build Mobile Inspections, or Build Mobile Historic Development, as applicable, and any applicable private agreements. If this page conflicts with official ordinances, published guidance, or direction from City of Mobile staff, the official sources control. For legal advice or legal interpretation, consult a licensed attorney.