Boulogne-Billancourt is a major city in the Hauts-de-Seine department of the Île-de-France region, situated directly on a loop of the Seine. This flat, low-lying commune serves as the capital of the arrondissement of Boulogne-Billancourt. Historically a major industrial centre, its modern economy has transitioned to corporate headquarters and service industries, benefiting from its position immediately adjacent to Paris.
The local housing market is exceptionally expensive, with property prices more than double the national average for France. Point du Jour holds by far the largest share of the city's housing, followed by the riverside development of Rives de Seine and the central district of Silly-Galliéni. The most expensive homes are concentrated in Centre Ville, where prices sit well above the city average. In contrast, the northern district of Les Princes-Marmottan offers the most affordable housing in the commune, with prices falling far behind those of the central districts.
