What does RS-5 zoning mean in Iowa City?

RS-5 is Iowa City's base low-density single-family district; under recent zoning reforms, RS-5 lots can also support a duplex on qualifying lots, in addition to a single-family home, subject to lot and design standards.

What is the South District Form-Based Code in Iowa City?

It's a form-based zoning overlay for older south-side neighborhoods that regulates building form, height, and street frontage rather than just use, part of the city's broader push for missing-middle infill housing alongside the older Riverfront Crossings form-based area.

How do I find the zoning for a property in Iowa City?

Neighborhood and Development Services maintains the official zoning map through the city's GIS portal; Title 14, the Zoning Code / Unified Development Code, then sets the applicable use, dimensional, or form-based requirements.

Iowa City, Iowa · city zoning districts · 11 districts

Iowa City, IA zoning map & districts

Iowa City's zoning is Title 14 of the City Code, the Zoning Code / Unified Development Code, administered by Neighborhood and Development Services (Housing and Inspection Services fields zoning questions), with the Planning and Zoning Commission reviewing rezonings before City Council approval. The base code uses a conventional structure with numbered residential and commercial districts such as RS-5, RS-8, RM-12, and CB-10, but Iowa City has been an early Iowa adopter of zoning reform aimed at missing-middle housing, with recent amendments easing duplex, multifamily, and ADU standards in parts of the city.

The code Iowa City Zoning Code

Iowa City zoning map

The interactive map needs JavaScript. See the official Johnson County Property Information Viewer (Iowa City Zoning layer) instead.

Residential 11
Special purpose 10
Mixed-use 6
Commercial 5
Downtown / core 3
Industrial 1

Source: Johnson County Property Information Viewer (Iowa City Zoning layer), retrieved 2026-08-30. Basemap: © OpenFreeMap © OpenMapTiles © OpenStreetMap contributors.

Find a district by address

District lookup only. No bulk standards and no ordinance citations are held for this city yet. Not a zoning verification.

Source: the official Johnson County Property Information Viewer (Iowa City Zoning layer) , retrieved 2026-08-30 — the authoritative source for current boundaries.

Iowa City's Neighborhood and Development Services department (Housing and Inspection Services) publishes Title 14 through the American Legal Publishing code library and maintains the zoning map; the city's GIS viewer is the parcel-level lookup tool.

A published summary is never the authority. The adopted ordinance and the city's official zoning map govern, and both change — verify the district and every standard on your parcel before you rely on it.

How zoning works in Iowa City

Two areas carry form-based code overlays layered on the base map: the long-established Riverfront Crossings District south of downtown, and the newer South District Form-Based Code, adopted to guide reinvestment in older south-side neighborhoods with building-form and street-frontage standards rather than conventional use-based zoning. Projects inside either overlay follow the form-based standards rather than the base district's dimensional rules, so confirming overlay status is a first step for any South District or Riverfront Crossings parcel.

Iowa City zoning districts by family

The 11 district codes below are the ones that decide most projects in Iowa City, grouped by what they are for rather than by the order the ordinance prints them.

Key districts in the Iowa City Zoning Code — a curated reference, not the exhaustive list. Confirm against the current adopted code.
Code	District	What it is for
Residential 6 districts
RS5	Low Density Single-Family Residential	Base single-family district; city GIS code has no hyphen (RS5, not RS-5).
RS8	Medium Density Single-Family Residential	Smaller-lot single-family and duplex development; code is RS8, not RS-8.
RS12	High Density Single-Family Residential	Higher-density single-family and attached housing; code is RS12, not RS-12.
RM12	Low Density Multi-Family Residential	Townhomes and small apartment buildings; code is RM12, not RM-12.
RM20	Medium Density Multi-Family Residential	Mid-rise apartment development; code is RM20, not RM-20.
RM44	High Density Multi-Family Residential	High-density apartments near downtown and campus; code is RM44, not RM-44.
Mixed-use 1 district
MU	Mixed Use	Blended residential and commercial development outside the core downtown.
Commercial 2 districts
CN1	Neighborhood Commercial	Small-scale retail and service uses; code is CN1, not CN-1.
CI1	Intensive Commercial	Auto-oriented and higher-intensity commercial uses; code is CI1, not CI-1.
Downtown / core 2 districts
CB5	Central Business Support	Downtown-adjacent office, residential, and commercial mix; code is CB5, not CB-5.
CB10	Central Business	Core downtown district, city's highest densities and heights; code is CB10, not CB-10.

Iowa City zoning — common questions

What does RS-5 zoning mean in Iowa City?: RS-5 is Iowa City's base low-density single-family district; under recent zoning reforms, RS-5 lots can also support a duplex on qualifying lots, in addition to a single-family home, subject to lot and design standards.
What is the South District Form-Based Code in Iowa City?: It's a form-based zoning overlay for older south-side neighborhoods that regulates building form, height, and street frontage rather than just use, part of the city's broader push for missing-middle infill housing alongside the older Riverfront Crossings form-based area.
How do I find the zoning for a property in Iowa City?: Neighborhood and Development Services maintains the official zoning map through the city's GIS portal; Title 14, the Zoning Code / Unified Development Code, then sets the applicable use, dimensional, or form-based requirements.

Working in Iowa? Get on the list.

The parcel layer lands in the order demand does. Illinois went first because that's where the deals were; the next state is decided by who tells us what they're trying to underwrite. Tell us where you're building and what you wanted to run — you'll hear from us when Iowa opens, and sooner if we need a test parcel.

Keep reading

← Iowa zoning — who holds the zoning power in Iowa, under which enabling statute, and the reforms that override local rules.

Other Iowa cities

The zoning reference → — every state, plus city-level district guides like this one.

Iowa City zoning summaries on this page are provided for information, not legal advice. Confirm every project against the current adopted code for the jurisdiction.