This article has evidence gaps. Read the research notes before relying on its conclusions.
Research cutoff: · Updated:What makes a settlement informal?
Informality describes a relationship with land, housing, and regulatory systems rather than a single architectural appearance. Pooya Alaedini’s historical account associates Iranian informal settlements with uncertain tenure, informal land transactions, nonstandard construction, and insufficient services. It explains that households may purchase privately owned plots through informal transactions while lacking approved subdivision or construction permits. Calling all such residents squatters would therefore obscure important differences. s1
The Persian expression hashieh-neshini refers to living on the margins or outskirts. Yet physical location alone is an inadequate definition: a neighborhood may become incorporated into a municipality while retaining service deficits and poverty. Equally, the presence of an informal land transaction does not establish identical living conditions in every household. s1
[s1]From isolated projects to a wider policy response
A Cities Alliance report records Iran’s request for assistance in developing a national upgrading approach. The objective was to move beyond isolated interventions toward participatory programs operating across cities. Its account of the national strategy identifies inadequate housing policies, weak management, and contradictory decisions as contributors to informal settlement formation. This historical policy diagnosis places responsibility on institutions and housing systems rather than treating residents themselves as the problem. s2
The strategy described accessible infrastructure, better living conditions, and participation in local decisions as objectives. These statements document an intended approach. They do not demonstrate that adequate infrastructure reached every settlement or that residents consistently influenced implementation. s2
[s2]Components of the documented upgrading approach
The arrows describe objectives and principles recorded in the historical strategy. They do not establish implementation, current legal entitlements, or measured outcomes.
[s2]Implementation must be examined locally
Alaedini describes upgrading interventions in Kermanshah, Zahedan, Bandar Abbas, Sanandaj, and Tabriz that combined physical and socioeconomic activities. His account also identifies substantial differences among settlements and warns, through its case evidence, against assuming that all residents are recent rural migrants. s1
For readers, the practical distinction is between a neighborhood label and evidence about its conditions. Infrastructure provision, tenure, employment, and household circumstances require separate investigation. A completed building or adopted strategy answers only part of that inquiry. s1s2
[s1] [s2]Why a current national total is not supplied
Historical inventories, selected-city studies, and extrapolated estimates are different kinds of evidence. Alaedini’s account includes each, making their scope essential to interpretation. None should be silently relabeled as a current national census of informal-settlement residents. s1
A defensible contemporary account needs a dated definition, settlement boundaries, documented geographic coverage, and evidence of how households were counted. Until those materials are inspected, the supported conclusion remains limited: informal settlement upgrading has a documented policy history in Iran, while its current reach and effectiveness require further verification. s1s2
[s1] [s2]Sources & research notes
- [s1] CITIES vi. Urban Informal Settlements in Modern IranEncyclopaedia Iranica · Pooya Alaedini; Policy shifts; Extent of informal settlements; Characteristics; updated September 16, 2015 · Accessed 2026-10-28
- [s2] Cities Alliance Annual Report 2004Cities Alliance · Urban Upgrading in Iran; PDF pages 48–49, printed pages 46–47 · Accessed 2026-10-28
limitations
- The inspected evidence supports a historical account rather than a verified assessment of conditions in 2026.
- The institutional source documents objectives and policy commitments; it is not an independent impact evaluation.
- The scholarly reference article synthesizes earlier research and administrative records.
unverified items
- Current nationwide settlement inventory, definition, and population coverage.
- Current implementation responsibilities and applicable legal provisions.
- Recent independent assessments of service improvements, tenure security, displacement, and resident participation.
data gaps
- No comparable national annual series on informal-settlement residents or upgrading outcomes was inspected.
- Historical selected-city estimates and extrapolations were not converted into a national trend.
- An evidence pack with dated settlement inventories, definitions, and recent independent evaluations is required to complete the contemporary account.
coverage period
Historical policy development and settlement research summarized in sources published through 2015; contemporary outcomes remain unverified.