Montparnasse Approves Zoning Changes, Adding 1,200 Housing Units

Montparnasse city council voted 8-3 on Thursday to approve amendments to the Local Area Planning Scheme that relax building height restrictions in the Rue de la Grande Chaumière precinct, the Montparnasse Cemetery ward, and the southern transit corridor near Boulevard Raspail. The changes permit developers to construct residential buildings up to 18 storeys in zones previously capped at 12 storeys, affecting 47 separate land parcels across the three areas. Mayor's office staff said the modifications align with national housing targets outlined in the 2025 Productivity and Affordability Framework.

The move reflects pressure on Montparnasse to house a growing population. The commune's population rose to 58,740 residents in the 2024 census, up 3.2 percent from 2019, while median rent for a one-bedroom flat has climbed 18 percent in four years to €890 per month, according to the local property council's June survey. That gap between population growth and housing supply has translated into longer waiting lists for public housing and fewer available units at prices working families can afford. National housing data from the Direction Générale des Finances Publiques shows Montparnasse's private rental vacancy rate sits at 1.8 percent, well below the 3 percent benchmark planners consider healthy.

What This Means for Your Neighbourhood

For residents already living in these three zones, the changes will reshape street-level activity and traffic patterns. The Rue de la Grande Chaumière zone includes 14 blocks between Avenue du Maine and Boulevard Edgar-Quinet; developers can now file applications for larger apartment complexes that could house 400 to 500 new residents in that single ward. Local schools and GP surgeries will absorb some pressure. The nearest lycée, Lycée Montparnasse, currently serves 1,240 pupils; the city's education director said Thursday that additional funding for classroom capacity is built into next year's capital budget, though specific amounts were not disclosed.

The council also approved a 2 percent affordable housing requirement embedded in the zoning code, meaning developers must either include units with rents capped at 30 percent of median local income or contribute €180,000 per unit waived to a city housing fund. Property analysts note this falls short of the 20 percent affordable quota some advocates had sought, but the mayor's planning officer argued the lower threshold makes projects financially viable in Montparnasse's high-land-cost market. The Montparnasse Housing Alliance, a tenant advocacy group, said the compromise would yield perhaps 240 affordable units from the expected 1,200 total new dwellings over the policy's five-year implementation window.

Timeline and Implementation

Zoning variances take effect 30 days after council approval, meaning developers can lodge new applications from August 9 onwards. The city expects the first construction approvals in late 2026, with groundbreaking likely in early 2027. Building permits for the tallest structures typically require 18 to 24 months of review. The mayor's office says it will hire two additional planning officers to handle the expected surge in applications; their salaries are budgeted at €95,000 annually in the 2027 operating plan.

Parking remains a friction point. The code requires one space per two residential units in the new buildings. Local residents and businesses raised concerns at three public hearings that this would worsen street parking congestion in the transit corridor zone, where 60 percent of existing households already have no off-street parking. The council did not adjust the parking standard, but the mayor said her team would begin a parking strategy review in the second half of 2026. The first new housing units are expected to be ready for occupancy in late 2028.