Since 2011, any single-family home can be fitted with an integrated unit, either as part of the initial planning of the house or as an afterthought. This means that a single-family home can easily be converted into a two-family home. The integrated unit requires planning permission and cannot be sold separately. The integrated unit must also be subordinate in terms of floor area to the main unit and must have its own entrance door, either from the outside or from a communal circulation area. Integrated housing gives the owner a single-family home that can be adapted to suit the composition of the household or the lifestyle chosen. Integrated housing is an investment property that can provide security in the event of a change in lifestyle. The support of parents or grandparents for childcare or the provision of a home for teenage children can be a major asset. Integrated housing can also be considered as an investment property that can be used as rental accommodation to generate additional income. The single-family home can therefore easily be transformed into a two-family home. The only constraint is that the integrated unit cannot be sold separately. A grant of €10,000 for the creation of an integrated unit has been introduced, with no income requirements. The homeowner who applies must live in one of the two units after the work has been completed. This subsidy is increased to €20,000 for all integrated housing completed before the end of 2026 (article 31 de la loi modifiée du 7 août 2023 relative aux aides au logement).The website luxembourg.public.lu contains a list of all housing grants.