Syplo, for Housing Priority System, is a digital tool shared between the State, social landlords, the SIAO, and Action Logement. It lists, at the departmental level, applicants for social housing recognized as priorities. Being registered in Syplo conditions the visibility of a file to organizations bound by allocation obligations, but this registration does not automatically trigger a relocation proposal.
Transition from Syplo labeling to SI-SIAO: what changes in 2026
The usual content on Syplo describes a stable circuit: a social worker submits a file, the SIAO or the prefecture validates the labeling, and the household enters the software’s priority pool. This scheme has been recently modified.
Since March 31, 2026, the function of labeling in Syplo is closed. This operation now shifts to the information system of the SIAO, the SI-SIAO. The right to be recognized as a priority household does not disappear, but the technical and institutional channel changes. The decision for labeling now falls under the SIAO and its own information system.
This shift has direct consequences. Social workers assisting a household must now ensure that the priority request is properly routed through the SI-SIAO, and not through the old Syplo circuit. A file entered in the wrong tool risks never appearing in the pool consulted by landlords. To better understand the rights of priority households on Syplo and recent developments, this change of channel must be integrated into any process initiated after this date.
Criteria for recognizing a priority household in social housing
The labeling as a priority household is based on criteria defined by the Departmental Action Plan for Housing and Accommodation of Disadvantaged Persons (PDALHPD). Not all departments retain exactly the same profiles, but a common foundation is found everywhere.
Situations that grant the right to priority recognition include:
- People with disabilities or hosting a person with disabilities, for whom the current housing does not meet accessibility or space needs.
- Households exiting accommodation (emergency shelters, CHRS, social hotels) directed by the SIAO to autonomous housing.
- Individuals recognized as priorities by the DALO mediation commission, after the legal deadline has expired without an appropriate proposal.
- Applicants facing unsanitary, overcrowded housing or subject to an eviction procedure, under certain departmental conditions.
Recognition does not rely on a single criterion. It is often the intersection of housing situation, resources, and family composition that triggers labeling. An applicant with low income living in suitable housing will not necessarily be labeled, while a household with modest income facing a sanitation order will be labeled more easily.
DALO appeal and mediation commission: the procedure when no proposal arrives
Being labeled as a priority in Syplo (or now in the SI-SIAO) guarantees nothing. The time between labeling and an effective housing proposal varies significantly depending on the departments and the pressure of the local social rental market.
When a recognized priority household has not received any proposal within a timeframe deemed abnormally long, the main recourse is through the right to housing that can be enforced (DALO). The procedure is divided into two distinct steps.
Referral to the mediation commission
The applicant submits a file to the mediation commission of the department. This commission examines the situation and issues an opinion: either it recognizes the priority and urgency, or it rejects the request. In case of recognition, the prefect has a deadline to propose suitable housing. This deadline varies by department, with significantly longer durations in highly pressured areas like Île-de-France.
Contentious appeal before the administrative court
If the prefect does not propose housing within the allotted time after a favorable decision from the mediation commission, the applicant can refer the matter to the administrative court. The judge can then order the State to relocate the household and attach this injunction with a financial penalty per day of delay. These penalties are paid to the National Fund for Support towards and in Housing, not directly to the applicant.
A often overlooked point: rejection by the mediation commission can also be subject to appeal. The applicant then has a deadline to contest this decision before the administrative court.
Discrepancy between Syplo labeling and actual relocation: a counting problem
The intersection between Syplo data and that of the National Recording System (SNE) reveals significant discrepancies between actual allocations and those recorded by the State. The Regional Union for Housing in Hauts-de-France highlighted a telling example: more than 300 labeled allocations in Syplo had not been recorded within the framework of the national Housing First initiative over a year. These allocations represented more than a quarter of allocations to those exiting accommodation.
This gap arises from the fact that Syplo and the SNE are two distinct tools, with different data entry logics. A landlord can record an allocation in Syplo without the link to the SNE being properly established. The household is indeed relocated, but the State does not see it in its dashboards.
For an applicant, this situation has concrete consequences. A poorly traced path in the information systems can distort the assessment of their situation during an appeal. If the mediation commission or the administrative court consults incomplete data, the actual waiting time may appear shorter than it is. Ensuring that their file is correctly filled out in the right tool, with the referring social worker, remains a directly useful precaution.
The transition from labeling to SI-SIAO in 2026 aims to reduce these inconsistencies by centralizing monitoring in a single system. However, the initial months of transition remain a period where data entry errors and duplicates between old and new circuits are most likely.