What is concerned ? The Carrez Law obliges the vendor of a co owned lot to mention the exact area of his lot. During the sale of this co owned lot of a surface of more than 8 m², the living accomodation must appear clearly in the promise to sell. If the exact surface isn’t mentioned, the buyer can claim for the invalidity of the sale in the month after the signing of the final deed. But if the surface is mentioned, he can’t claim for the validity. The buyer has one year from the signing of the sale to sue for a reduction in price in proportion to the missing surface if the surface mentioned on the final deed is at least 5% bigger .     Our services A technician from Chasles Expertise surveys the living accomodation to enclose in the promise to sell with in the appendices the surfaces which are not enclosed in the Law Carrez measurements. Validity of the certificate: permanent if no other inside modifications are undertaken.     Carrez law Decree n° 97-532 of May 1997 gives the definition of the private unit of a joint ownership lot. Art. 4-1 The area of a private unit of a lot or of a fraction of a lot mentionned in article 46 of the law of July 10th 1965 is the “area of the closed covered floors of the building after deduction of the surfaces occupied by the walls, partitions, steps and stair-wells, embrasures of doors and windows. It is not held account of the floors which height is lower than 1,80 meter”. Art. 4-2 The lots or fractions of lots of an area below 8 sq meters are not held into account for the calculation of the area mentionned in article 4-1.		Device to carry out plans and other measures