Slab Rights (Direito de Laje): A New Form of Property Ownership in Brazil

This page is a translation of the original Portuguese text, provided for convenience. It deals with Brazilian law. If there is any discrepancy, the Portuguese version prevails. Read the original in Portuguese

The slab right (direito de laje), created by Law 13.465/2017, allows a structure built above or below an existing building to have its own file in the real estate registry. It brings legal recognition to a situation found in millions of Brazilian homes.

Origin and Concept of the Slab Right

The slab right was the legislature’s answer to a long-established reality in Brazil’s urban outskirts and low-income communities, where it is extremely common to find several stacked housing units on a single lot. Families build on top of the roof slab of a parent’s, grandparent’s, or other relative’s house, creating independent units that, until 2017, could not be registered as separate property in any way.

Governed by Articles 1.510-A through 1.510-E of the Civil Code, the slab right allows its holder to have a real estate unit that is distinct from the building originally constructed on the ground, with its own registry file (matrícula) at the real estate registry office. That unit may sit above (sobrelevação) or below (infraestrutura) the base structure, and it functions independently of the original property.

The social importance of this institution is enormous. Millions of housing units in Brazil are estimated to fall into this situation, and the slab right allows them to be formalized. That gives the people living there legal certainty and opens the door to financing, formal inheritance, and regular real estate transactions.

Requirements for Creating a Slab Right

To create a slab right, the independent unit must have its own access to a public street, whether directly or through a shared passage. The structure must also be functionally separate. In other words, it must be a self-contained unit with its own facilities for basic living or use.

The owner of the base structure (the owner of the land and the original property) must consent to creating the slab right. The exception is where the upper structure already existed before the law took effect and can be regularized through adverse possession (usucapião). Consent may be given by public deed or private instrument, followed by registration in the base property’s registry file.

That unit may sit above (sobrelevação) or below (infraestrutura) the base structure, and it functions independently of the original property.

A unit created through a slab right will have its own registry file, separate from that of the base structure. With it, the holder can exercise all the powers of ownership over the unit, including selling, renting, mortgaging, and passing it on by inheritance.

Differences Between a Slab Right and a Condominium

It is important to distinguish a slab right from a condominium (condomínio edilício), the Brazilian form of multi-unit building ownership. In a condominium, unit owners are also co-owners of the common areas and the land, sharing responsibilities and maintenance costs. With a slab right, there is no co-ownership of the land. The slab holder owns only the unit itself, with no undivided share of the ground.

This has important practical consequences. A slab holder does not pay condominium fees (unless there is an agreement on shared expenses, such as maintaining an access staircase), does not take part in condominium meetings, and has no say in how the landowner’s areas are managed. On the other hand, any disputes over maintenance of shared structures (such as columns, beams, and the roof) should be resolved on the basis of good faith and each holder’s contribution in proportion to the benefit received.

Second-Level Slabs and Limitations

The Civil Code allows successive slabs, known as second-level slabs (or third, fourth, and so on). This means a slab holder may, in turn, grant a third party the right to build on top of his or her own slab, creating a new independent unit above it.

However, this is subject to the express authorization of the owner of the base structure (the landowner) and to compliance with urban planning and structural safety rules. Municipal law may impose height limits (gabarito, the maximum height of a building) that make higher-level slabs unfeasible. Likewise, the structure must be able to bear the added weight, or else the safety of everyone living in the building is at risk.

A holder who wants to grant a second-level slab is responsible for confirming that the new construction is technically and legally feasible, preferably with the help of an engineer or architect, and for obtaining the necessary approvals from the city government.

Regularization and Registration

A slab right is regularized by registering it at the competent real estate registry office. You must submit the constituting instrument (a public deed, or a private instrument with notarized signatures), the floor plan of the independent unit, and the consent of the base structure’s owner, where applicable. The registrar will open a separate registry file for the slab unit and link it to the original property’s file through an annotation (averbação).

In urban land regularization programs (Reurb), which are provided for in the same Law 13.465/2017, a slab right can be recognized through a simplified procedure, with some documentary requirements waived. This is especially important for low-income communities, where informal land occupation is the norm and the formalization of property ownership is a decisive step toward social inclusion.

Frequently Asked Questions

Who pays the IPTU (Brazil’s municipal urban property tax) on a unit created through a slab right?

Each holder is responsible for the IPTU on his or her own unit. Once a separate registry file is opened for the slab unit, the municipality should issue a separate IPTU bill for each unit, based on each one’s built area and assessed market value. If the city has not yet registered the slab unit independently in its tax records, the holder may request that the tax record be split, submitting the registry office file as proof.

How does the sale of a property with a slab right work?

The owner of the base structure may sell his or her property without affecting the slab right of the upper unit’s holder, and vice versa. They are independent properties, each with its own registry file. However, Article 1.510-D of the Civil Code establishes a reciprocal right of first refusal: if the owner of the base structure wants to sell, he or she must first offer the property to the slab holder, and the same applies the other way around. The period to exercise this right is 30 days after notice.

What is the difference between a slab right and a surface right?

The surface right (direito de superfície), governed by Articles 1.369 through 1.377 of the Civil Code, allows a landowner to grant a third party the right to build or plant on the land for a fixed or indefinite period. It is a real right over another person’s property and is temporary in nature. A slab right, by contrast, gives full and perpetual ownership of the constructed unit, with its own registry file and no time limit. The slab holder is an owner, not merely a surface right holder, which gives greater security and broader powers over the property.

As informações deste artigo são de caráter informativo e não substituem consulta jurídica individualizada. Cada caso possui particularidades que exigem análise específica.