Affordable Housing 2026: What Changes for Owners, Developers and Landlords

Key data

Owners, developers and landlords have a new regulatory framework to comply with from October 7, 2026. The Royal Decree-Law 29/2026 establishes urgent measures to protect the social function of housing and expand the supply of affordable housing, and the Permanent Delegation of Congress validated it on November 12, 2026 in accordance with Article 86.2 of the Constitution.

Validation is a key step: it means that the measures do not lapse and maintain their full force. Additionally, the decree could be processed as a bill, which would allow modifications to be introduced during the parliamentary process. Until that occurs, the current text is what is binding.

What does this regulation establish?

Royal Decree-Law 29/2026 is structured around two main axes of housing policy:

• Protection of the social function of housing: The social character of residential use is reinforced, which may imply obligations or limitations for owners and landlords in certain circumstances.
• Expansion of affordable housing supply: Measures are adopted to increase the stock of housing at accessible prices, with direct implications for real estate developers and public administrations.

Parliamentary validation, regulated in Article 86.2 of the Constitution, ensures that these provisions do not lose force over time. Congress may also agree to process it as an ordinary bill, which would open a broader process of amendments and debate.

It is important to emphasize that the decree entered into force on October 7, 2026, the date of publication of the original Royal Decree-Law, not the date of its validation. This means that the obligations it establishes are enforceable from that date.

Economic and operational impact

The impact of this regulation translates into concrete operational changes for the different agents in the real estate market:

• Owners and landlords: They must review their contracts and actions to ensure they comply with the new requirements linked to the social function of housing. Non-compliance can generate liability to the Administration.
• Real estate developers: Measures to expand affordable supply may impose new obligations in developments, land reserves or commercialization conditions, depending on regulatory development.
• Public administrations: They are bound to adapt their urban planning and asset management actions to the new framework, which may affect tenders, land transfers and public housing programs.
• Tenants: They benefit from a reinforced protection framework, although the concrete effects will depend on subsequent regulatory development.

Given that the decree can be processed as a bill, there is a possibility that the final text will incorporate modifications. Companies and professionals in the sector must monitor the parliamentary process to anticipate additional changes.

Who does it affect?

• Housing owners — especially large holders and those operating in tight market areas.
• Landlords — individuals and legal entities that rent residential properties.
• Real estate developers — companies that develop land or promote new housing.
• Tenants — as beneficiaries of protection measures.
• Public administrations — municipalities, autonomous communities and bodies with competencies in housing and urban planning.
• Legal and tax advisors in the real estate sector who must update their clients' contracts and structures.
• Investment funds and REITs with portfolios of residential assets in Spain.

Practical example

A real estate developer that has an ongoing development of 80 housing units in an area declared to have a tight market must review, from October 7, 2026, whether the commercialization conditions and planned prices comply with the requirements of Royal Decree-Law 29/2026 regarding affordable housing.

If the decree establishes mandatory reserves of affordable housing or price limitations in certain circumstances, the developer will need to adapt its business plan before continuing with commercialization. Similarly, a large landlord with more than ten rental properties in a tight market area must verify that its existing contracts and new ones it enters into comply with the reinforced protection framework established by the regulation.

In both cases, the immediate action is to review the asset portfolio and contracts with specialized legal advice, given that the decree is already enforceable from October 2026.

What should companies do now?

1. Review existing rental contracts to identify clauses that may conflict with the new requirements for the social function of housing.
2. Audit the portfolio of residential assets to determine which properties fall within the scope of the decree, especially in tight market areas.
3. Consult with a specialized legal advisor in real estate law to assess the concrete impact on each ongoing operation or development.
4. Monitor the parliamentary processing of the decree as a possible bill, as it could introduce relevant modifications to the current text.
5. Update contract templates and internal commercialization procedures to adapt them to the new framework from October 7, 2026.
6. Inform asset management teams and compliance officers about the entry into force and its operational implications.

Official source

Consult complete regulation at official source

Notice: This article is for informational purposes only and does not constitute legal advice. For specific decisions, consult a qualified professional. Source: https://www.boe.es/diario_boe/txt.php?id=BOE-A-2026-23755