Is it illegal not to have a party wall agreement?

Claim for party wall

The one built on the boundary of two estates. They are called “contiguous” when they have been built entirely on the land of one of the neighboring owners, and “inscribed” when their axis coincides exactly with the demarcating boundary of both estates, that is to say, “astride” the boundary.

Any owner of an estate may oblige his neighbor to build and maintain walls 3 meters high and 18 inches thick to enclose and divide his adjoining estates, which are located within the enclosure of a town or in the suburbs (article 2,726 of the Civil Code).

The Civil Code of the Nation was sanctioned by law 340 and only by law 845 the metric decimal system was put into effect, so that the equivalent conversion must be made (1 inch = 2.54 cm).

It can be released from this obligation by ceding half of the land on which the wall must be built, and renouncing the party wall (article 2,727 of the Civil Code). The abandonment does not proceed when there is an effective use of the wall (C. App. C. C. Ros. Chamber II March 5, 1964 Digesto Jurídico, Volume IV, page 1.559).

When does a wall cease to be a party wall?

Non-existence of party-wall easement.

When in the dividing walls of the buildings there are windows or open holes. When the dividing wall is on one side straight and plumb along its entire face, and on the other side it has the same on its upper part, with relexes or retaillos on the lower part.

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When is it not a party wall?

A wall is considered a party wall when both neighbors contributed equally to its construction. They usually have a thickness of 30 centimeters, of which 15 centimeters belong to each neighbor. … Walls dividing courtyards, gardens, or country houses are not considered party walls.

What does the law say about party walls?

Section 2,730. The party wall gives the right to each of the condominium owners to use the party wall for all the uses to which it is destined according to its nature, provided that they do not cause damage to the wall, or compromise its solidity, and do not hinder the exercise of equal rights for the neighbor.


The evolution of construction systems entails modifications that not only affect the technical aspects of buildings, but also gradually have repercussions on the application of legal rules that, due to such advances, have become obsolete. In this sense, in colloquial terms, the days of the party wall easement are numbered ( better understood as decades ), given that modern construction systems have made the party wall lose importance since reinforced concrete construction forms a mass in which it is not possible to practice carvings, or open in one part without compromising the stability of the whole, so that the walls that are currently built in large buildings can not be used by the neighboring owner. Notwithstanding the foregoing, most of the hamlets of our rural municipalities as well as the historic centers of our capital cities are a current source of conflicts in the matter of party walls, not only because of the old buildings to be rehabilitated, but also because of the problems linked to the demolition of old buildings to build new ones. For this reason, in this article we will deal with some interesting aspects of party wall easements.

What can be done in a party wall?

Based on the foregoing, Article 579 of the Civil Code provides that: “Each owner of the party wall may build by leaning his work on the party wall, or by inserting beams up to half of its thickness, but without impeding the common and respective use of the other party walls.

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How do you know who owns a party wall?

16- How do you prove party party walls? The general principle is that any wall or wall that serves as a separation between two buildings is presumed to be a party wall, in all its height up to the end of the less elevated building.

How much adjoining property must be left?

Separation and Protection of Adjoining Buildings

Separation from Adjoining Buildings, that all buildings must be separated from their boundaries with neighboring properties by a distance of not less than 50 mm.

A party wall may be erected without the neighbor’s permission.

In principle, the boundaries (delimitation or demarcation) between properties 03 is by means of vertical planes, which are defined by straight or curved lines on the ground level, which are graphically recorded in plans.

These walls cannot be used by the neighbor. For example, the neighbor must not support or anchor constructive elements on it. Or if he builds a room, he must build another wall against the neighbor’s wall, within his own land. 04

It is advisable to read the article “Medianería” by Surveyor Federico G. Amonte Olivera (Registration No. 318), published in “Agrimensura” Magazine, No. 22, of the Association of Surveyors of Uruguay, in January 1961.

How high does the party wall have to be?

The wall must be at least 3 meters high, but it can be higher. It should be noted that up to 3 meters the wall will be a party wall, that is to say, it will belong to both neighbors. Above that height, it will belong to whoever built it (2).

Where is the party wall built?

When we talk about a party wall, we can simply refer to the wall that separates two closed properties of different owners. This type of wall is built on a dividing axis of properties or contiguous to it.

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How do I know if the wall is mine or the neighbor’s?

If the wall has been built on the land of one of the properties, instead of being in the middle between one and the other, occupying part of both. Obviously, on this occasion, the owner will be considered to be the one on whose property the wall is built.

How do you know who owns a party wall?

This presumption of party wall can be destroyed by the exhibition of the title that proves that the element is owned by only one or by the presence of an exterior sign indicating the private ownership of one. This is how the Judgment of the Provincial Court of Zaragoza of October 30, 2015 (SP/SENT/834344) has stated it.

One of the powers that correspond to each party is to be able to raise the party wall, at its own expense and compensating the other for the damages caused, as provided in art. 577 CC. This has been expressed by the Supreme Court in its Judgment of March 1, 2016 (SP/SENT/844300).