The obligation to reserve 20 percent of the land fund for social housing is a constitutive condition of many commercial housing projects in large cities, and also the obligation most often underestimated at project preparation stage. The developer has three routes: allocating the land inside the project, allocating land at another location, or paying an equivalent amount as decided by the provincial People Committee. Each route carries its own calculation, procedure and risk points, and choosing wrongly or delaying can do more than attract a fine: it can block the sales procedures of the entire project.
Governing Instruments
The 20 percent land fund obligation and its three fulfilment routes
Under Article 83 of Housing Law 27/2023/QH15, cited here at topic level, the investor of a commercial housing construction project in the prescribed categories of urban areas must reserve a portion of the project land area, corresponding to the 20 percent land fund, to build social housing or perform an equivalent obligation under a plan accepted by the competent authority. The obligation arises from the nature of the project and its urban location, regardless of whether the developer wishes to develop social housing, and must be determined right in the investment approval dossier and the detailed planning of the project rather than left until the sales phase.
The three fulfilment routes are: allocating the 20 percent land fund inside the project boundary for social housing construction; allocating land at another location consistent with planning under approval of the competent authority; or paying an amount equivalent to the value of the land fund to be reserved. The choice among them is not entirely the developer decision: the provincial People Committee decides the plan based on planning, the local social housing land fund and the nature of the project. Projects in special-class and class I cities are more often expected to allocate land on site or at an equivalent location, while payment in lieu is more common for small projects or locations unsuitable for social housing.
Application Analysis
Where payment in lieu is approved, the amount is determined as equivalent to the land use right value of the 20 percent area to be reserved, calculated by the land price table or the specific land price at the time of determination under Government guidance, in which Decree 100/2024/ND-CP is the instrument guiding the Housing Law on social housing, cited at framework level. The two variables deciding the amount are the land area on which the obligation is computed and the land unit price applied, so real disputes usually turn on how the obligation base area is identified and when the land price is locked. The developer should obtain a written determination of the amount and its calculation basis from the competent authority, because this sum is a financial obligation of the project and must be booked and disclosed consistently in the sales dossier.
Failure to perform, or improper performance of, the 20 percent land fund obligation produces framework-level consequences on three fronts. Procedurally, the project may not obtain approval or adjustment of its investment policy, and follow-on procedures tied to selling future-formed houses are affected because the social housing obligation forms part of the project legal file. Financially and administratively, the developer faces penalties and is compelled to perform the outstanding obligation, including paying the equivalent amount together with the consequences of late performance. On the market side, a published breach of the land fund obligation erodes buyer and financing partner confidence, because it shows the project foundational legal file was never closed.
Recommended Actions
- Determine the obligation inside the approval dossier: whether the project falls within the 20 percent land fund duty under Article 83 of the 2023 Housing Law and on what area it is computed.
- Propose a reasoned fulfilment route: on-site allocation, allocation at another location or payment, with a planning and local social housing land fund analysis for the provincial People Committee.
- If paying: obtain a written determination of the amount showing the area and land price basis at the determination date, and book the obligation into the project cost and pricing structure.
- Discharge the obligation on time and archive the completion evidence in the project legal file for every later sales procedure.
- For an ongoing project with unclear obligation status: commission an independent review and work with the competent authority to confirm the handling plan before the next sales launch.
Frequently Asked Questions
In which cases must a commercial housing project reserve a 20% land fund for social housing?
Under Article 83 of Housing Law 27/2023/QH15, at topic level, the obligation attaches to commercial housing construction investment projects in the prescribed groups of urban areas, typically special-class cities and the larger urban classes identified by the law and its guiding instruments. When in scope, the developer must reserve land area corresponding to 20 percent within the project for social housing or perform an accepted substitute route. The obligation is determined from the investment approval and detailed planning stage, so the developer should verify the scope for the exact location and urban class of its project when preparing the dossier, instead of inferring from the experience of other projects.
Can the developer pay money instead of the 20% land fund, and how is the amount calculated under the new rules?
Yes, where the payment route is accepted by the competent authority as one of the three ways to perform the obligation. The amount equals the land use right value of the 20 percent area to be reserved for social housing, determined by the land price table or the specific land price at the time of determination under Government guidance, with Decree 100/2024/ND-CP guiding implementation of the Housing Law on social housing. Because land unit prices move over time, the gap between estimating the obligation and receiving the official written determination can shift the amount materially; the developer should seek early determination and reserve a land price movement margin in the financial model.
Which authority decides whether the 20% land fund is located inside the project or at another location?
The provincial People Committee is the authority that decides the allocation plan, based on construction planning, the local social housing development planning and programme, and the specific nature of the project. The developer proposes a plan in the project dossier, but the decision rests with the province: some projects are required to allocate land within the project boundary to secure social housing supply where demand exists, while others are accepted for allocation elsewhere or for payment where the project location is unsuitable. Because this decision directly affects design, product mix and project finance, the developer should seek the authority directional view before finalising the detailed planning.
How is a project handled if the 20% land fund obligation is not performed?
At framework level, consequences arrive on three fronts at once. On investment procedure, the project risks failing to obtain approval or adjustment of its investment policy while the obligation is undetermined and unperformed, and procedures for selling future-formed houses are affected because the project legal file is incomplete. On violation handling, the developer faces administrative penalties and is compelled to perform the outstanding obligation, including paying the equivalent amount where the payment route applies. On market operation, a lingering obligation raises compliance costs and dispute risk with buyers. The safest handling is to confirm and discharge the obligation at the approval stage, not to let it accumulate until the sales phase.
This article has been quality-reviewed by the FLAW AI Legal Council