Article 660

It is understood that there is an exterior sign, contrary to the easement of party wall:

(1) Whenever in the dividing wall of buildings there is a window or opening;

(2) Whenever the dividing wall is, on one side, straight and plumb on all its facement, and on the other, it has similar conditions on the upper part, but the lower part slants or projects outward;

(3) Whenever the entire wall is built within the boundaries of one of the estates;

(4) Whenever the dividing wall bears the burden of the binding beams, floors and roof frame of one of the buildings, but not those of the others;

(5) Whenever the dividing wall between courtyards, gardens, and tenements is constructed in such a way that the coping sheds the water upon only one of the estates;

(6) Whenever the dividing wall, being built of masonry, has stepping stones, which at certain intervals project from the surface on one side only, but not on the other;

(7) Whenever lands inclosed by fences or live hedges adjoin others which are not inclosed.

In all these cases, the ownership of the walls, fences or hedges shall be deemed to belong exclusively to the owner of the property or tenement which has in its favor the presumption based on any one of these signs. (573)