What Is I-2 Zoning? Heavy and General Industrial Districts Explained

I-2 is the heavy or general industrial district in codes that use I for industrial rather than M for manufacturing. Functionally it is the same tier as M-2: it allows what I-1 restricts, including heavier manufacturing, truck terminals, and outdoor storage yards. For industrial outdoor storage buyers, I-2 is usually the district where the yard is a permitted use instead of a hearing. A few cities use the label differently, so check the district's name before relying on the number.

What I-2 usually allows

• Everything permitted in I-1.
• Heavy manufacturing, processing, and fabrication.
• Truck terminals, freight and container yards, and fleet parking.
• Outdoor storage as a primary use, subject to screening.
• Contractor, equipment, and building material yards.
• Vehicle and heavy equipment repair.
• Recycling, salvage, and waste-related uses in some codes, often conditional.

Residential is prohibited or limited to a caretaker unit, and retail is usually limited to uses that serve the district.

What the code usually requires

• Screening for outdoor storage along streets and next to non-industrial districts, often opaque fencing of a set height.
• Setbacks and buffers from residential and commercial districts, larger than in I-1.
• Performance standards that permit more impact than I-1 but still regulate emissions, noise, and hazardous materials.
• Surface and stormwater requirements for yards.
• Truck routes and access rules, and in some cities a requirement for direct access to major roads or rail.

How real cities define I-2

• Atlanta: I-2 is the Heavy Industrial District, which permits heavy manufacturing in addition to the uses allowed in I-1 (Light Industrial). Dwellings are permitted only as accessory to a principal use.
• San Antonio: I-2 is Heavy Industrial, the top of three tiers above L (Light Industrial) and I-1 (General Industrial). It accommodates uses that are highly hazardous, environmentally severe, or generate very high volumes of truck traffic.
• Anchorage: I-2 is the Heavy Industrial District, intended as an industrial activity area and reserve for heavy manufacturing, warehousing and distribution, equipment and materials storage, major freight terminals, waste and salvage, and resource extraction and processing.
• Saint Paul: I2 is the general industrial district, between I1 (light industrial) and I3 (heavy industrial). Its use table permits general industrial uses and makes motor freight terminals, general outdoor processing, and motor vehicle salvage conditional uses.
• Lincoln, Nebraska: I-2 is the Industrial Park District, for manufacturing and industrial uses in an open, attractive setting. Light and heavy industrial uses belong to I-1 (Industrial), so the numbers there do not run from light to heavy.
• Miami-Dade County (unincorporated) uses IU-2 (Heavy Manufacturing). See our Miami zoning guide.
• Austin uses LI (Limited Industrial Service) and MI (Major Industry), and Phoenix uses A-1 (Light Industrial) and A-2 (Industrial). See our Austin and Phoenix zoning guides.

In Atlanta, San Antonio, and Anchorage, I-2 is the heaviest district. In Saint Paul it is the middle of three numbered tiers, and in Lincoln it is an industrial park. The district name tells you which.

What you can typically build

Manufacturing plants, truck terminals and cross-docks, industrial outdoor storage yards, contractor and equipment yards, heavy repair facilities, and rail-served facilities. Warehouses and distribution buildings are permitted too. Cities rarely create new heavy industrial land, so existing I-2 parcels near highways, rail, and ports tend to be scarce. Our industrial outdoor storage guide covers how to find yards and confirm the entitlement.

How to check a specific parcel

Confirm the district on the official zoning map and note the tier and the district's name, then read the use table for your exact use and the screening, surface, and setback standards. Check whether an existing yard is legally non-conforming under a newer code. In Plotzy, filter an industrial corridor to I-2 and equivalent designations by lot size, and ask Zoning AI "Is outdoor storage of trucks and trailers a permitted use in I-2 here, and what screening applies?" for an answer with the section cited.

Frequently asked questions

What does I-2 zoning mean?

I-2 is typically the heavy or general industrial district in codes that use I for industrial, allowing heavy manufacturing, truck terminals, outdoor storage yards, and other high-impact uses, subject to screening and performance standards. It is equivalent to M-2 in codes that use M.

Is I-2 the same as M-2?

Functionally, yes. Cities choose I or M as the letter, and the heavy or general tier serves the same role under either name. See our M-2 explainer.

Is outdoor storage allowed in I-2?

In most codes, yes, as a primary use with screening requirements. That is the main reason industrial outdoor storage buyers filter for I-2 and its equivalents. Confirm it in the local use table, because some cities make yards conditional even in the heavy district.

What is the difference between I-1 and I-2?

I-1 is light industrial, with limits on outdoor storage and off-site impacts. I-2 allows heavier manufacturing, truck terminals, and outdoor yards. See our I-1 explainer.

Sources

District names and standards on this page were checked against each jurisdiction's own code or planning documents on October 4, 2026. Codes are amended often, so confirm the current text before relying on any detail.

• City of Atlanta Code of Ordinances, Part 16, Chapter 17, I-2 Heavy Industrial District Regulations. Atlanta I-2 name and intent.
• City of Atlanta Code of Ordinances, Part 16, Chapter 16, I-1 Light Industrial District Regulations. Atlanta I-1 name.
• City of San Antonio Unified Development Code, Sec. 35-310.14, I-2 Heavy Industrial. San Antonio I-2 purpose, and the L and I-1 districts below it.
• Municipality of Anchorage: Title 21, Chapter 21.04, Zoning Districts (adopted chapter, August 9, 2017 edition). Anchorage I-2 name and purpose.
• Saint Paul Legislative Code, Sec. 66.513, Intent, I2 general industrial district. Saint Paul I2 intent.
• Saint Paul Legislative Code, Sec. 66.514, Intent, I3 heavy industrial district. Saint Paul I3 name.
• Saint Paul Legislative Code, Sec. 66.521, Industrial district use table. Uses permitted and conditional in Saint Paul's I2 district.
• Lincoln Municipal Code, Chapter 27.49, I-2 Industrial Park District. Lincoln I-2 name and description.
• Lincoln Municipal Code, Chapter 27.47, I-1 Industrial District. Lincoln I-1 name and description.
• Miami-Dade County Code, Chapter 33, Article XXX, IU-2 Industrial, Heavy Manufacturing District. Miami-Dade IU-2 name.
• City of Austin Land Development Code, Chapter 25-2, Article 2, Division 4, Industrial Base Districts. Austin's LI and MI districts.
• City of Phoenix Planning and Development Department: Staff Report Z-TA-2-25-Y (May 1, 2025). Names of Phoenix's A-1 and A-2 districts.