No. According to Article 1601-3 of the Civil Code, the land ownership is transferred to the buyer the moment the future state completion sales contract is signed. Therefore, the property is considered your personal asset. However, any payments for future constructions paid after your marriage are assumed to be communal. Should your marriage end in divorce or death, these payments will result in a financial obligation to the community, as detailed in articles 1467 and following of the Civil Code.