In brief
The Grand Paris Express, the largest transport project in Europe, comprises 200 km of automated metro and 68 new stations across 4 lines (15, 16, 17, 18) rolled out between 2024 and 2030. Properties within 500 metres of a future station gain 10 to 20% in value over the five years surrounding commissioning, and up to 25 to 30% in the most dynamic areas such as Saint-Denis Pleyel or Villejuif, which rose 29% (4,500 to 5,800 euros/m²) between 2019 and 2026. Home Select, a Paris property hunter since 2011 and member of the FCI, steers buyers towards areas still undervalued, with a 6% average negotiation and 1,200+ buyers already supported.
Key takeaways
- Properties within 500 metres of a new Grand Paris Express station see their value increase by 10 to 20% in the five years surrounding commissioning
- The price appreciation effect peaks 2 to 3 years before station opening, making early buying the optimal strategy
- Villejuif recorded a 29% price increase (4,500 to 5,800 euros/m²) between 2019 and 2026 thanks to Line 15 South
- Line 14 extension (Orly to Saint-Denis Pleyel) has been operational since 2024; Line 15 South opened in late 2025/early 2026
- The Grand Paris Express indirectly impacts inner Paris by making suburban municipalities more competitive with peripheral arrondissements
The Grand Paris Express is Europe’s largest transport project: 200 km of automated metro, 68 new stations, 4 new lines (15, 16, 17, 18) deployed progressively between 2024 and 2030. In 2026, several sections are already in service or about to open, and the impact on property prices is already measurable.
For the buyers we support, the Grand Paris Express is changing the trade-offs between inner Paris and the inner suburbs. Here is the analysis from our property hunters in 2026.
The Grand Paris Express timeline: where do things stand in 2026?
Two major sections are already running, the extended Line 14 since 2024 and Line 15 South since late 2025, and three more arrive during the year: the first sections of Lines 16 and 17 towards Le Bourget, then Line 18 towards Saclay in late 2026. The rest of the network, Lines 15 West and East plus the northern sections of Lines 16 and 17, is scheduled for 2028-2030.
The extended Line 14 (Orly to Saint-Denis Pleyel) has been operational since 2024. It connects Orly airport to Saint-Denis Pleyel, crossing Paris from south to north, serving Maison Blanche, Olympiades (13th), Saint-Ouen and Saint-Denis Pleyel. Its impact on prices is the most advanced.
Line 15 South (Pont de Sevres to Noisy-Champs) opened in late 2025/early 2026. This is 33 km of automated metro linking the southern suburbs in an arc, via Bagneux, Villejuif, Creteil and Champigny-sur-Marne: the first section of the future ring allowing travel from suburb to suburb without passing through the centre.
Lines 16 and 17 see their first sections open during 2026, with the connection to Le Bourget. The Le Bourget-RER station hub will connect both lines and facilitate access to the exhibition centre and Le Bourget airport.
Line 18 (Massy to Saclay) delivers its first segment in late 2026, connecting the Saclay plateau, a world-class scientific and university hub, to the Île-de-France rail network. This is a section eagerly awaited by companies and research labs on the plateau.
The Saint-Denis Pleyel hub is the central node of the network: four lines will eventually intersect there (14, 15, 16, 17). In 2026, Line 14 already runs there. A property hunter who anticipates the 2028-2030 openings identifies high-potential areas right now.
What measured impact does the Grand Paris Express have on prices?
The effect amounts to a 10 to 20% rise for properties within 500 metres of a future station, over the five years surrounding commissioning. In the best-placed municipalities, Villejuif and Saint-Denis Pleyel first among them, the increase reaches 25 to 30% since the project was announced.
The “station effect” in numbers
Properties located within 500 metres of a future station have recorded a rise of 10 to 20% in the five years surrounding commissioning (sources: Société du Grand Paris, Île-de-France notaires, DVF data).
The effect is asymmetric: the most marked increase occurs 2 to 3 years before the opening, when construction is visible and the date confirmed. After the opening, prices stabilise. Properties between 500 m and 1 km benefit from a dampened effect, in the range of 5 to 10%.
In the most favourable cases, municipalities that were undervalued, with good urban quality and new developments nearby, the increase has reached 25 to 30% since the initial announcement (Saint-Denis Pleyel, Villejuif).
The municipalities that have benefited most
Villejuif is the most striking example. The average price per m² went from 4,500 euros to 5,800 euros between 2019 and 2026, a rise of nearly 29%. The Villejuif-Institut Gustave Roussy station, on Line 15 South, connects the town to the network with no transfer.
Saint-Denis has recorded a rise of approximately 15%. The Pleyel district is being transformed with the arrival of the multimodal hub and the Olympic Village converted into housing.
Bagneux has progressed by 12% thanks to the double effect of the extended Line 4 (2022) followed by Line 15 South. The town is now less than 20 minutes from Châtelet by metro.
Champigny-sur-Marne shows a rise of 8%, more moderate as the Line 15 South opening there is recent. The catch-up potential remains significant.
Where should you buy in 2026 to benefit from the Grand Paris Express?
On the sections opening in 2026-2027 and on those scheduled for 2028-2029, before the station effect is fully priced in. The rule does not change: buy 2 to 3 years before the opening, within a 10-minute walk of the future station.
Sections opening in 2026-2027
Buyers who wish to benefit from the “station effect” before it is fully priced in should target sections currently opening.
Line 15 South in its entirety (Pont de Sevres to Noisy-Champs) creates opportunities in Issy-les-Moulineaux, Fort d’Issy, Arcueil-Cachan and Creteil l’Echat. These stations are already attracting investor attention, but transactions do not yet reflect the full impact of commissioning.
Lines 16 and 17 towards Le Bourget create new connectivity for municipalities in Seine-Saint-Denis in the northeast. Prices there remain among the lowest in Île-de-France, leaving a proportionally greater margin for growth.
Line 18 towards Saclay targets a specific profile: buyers connected to the university and scientific cluster. The municipalities of Massy, Palaiseau and Gif-sur-Yvette are seeing new demand, driven by researchers and executives from technology companies.
The optimal buying strategy
Experience accumulated on lines already opened allows concrete recommendations to be made.
Buying 2 to 3 years before a station opens maximises the potential for value appreciation. Once the station is in service, most of the increase is already priced in. In 2026, this window concerns the stations planned for 2028-2029 on Lines 15 West and 15 East.
Prioritising properties within a 10-minute walk of a future station is essential. The transport effect diminishes rapidly beyond this perimeter. A property hunter measures the real walking distance, not the theoretical distance on a map.
Checking ZAC (Zone d’Amenagement Concerte) projects around stations is a must. ZACs create new supply that can weigh on resale prices for older stock in the short term, but that improves the overall attractiveness of the neighbourhood in the medium term.
Does the Grand Paris Express change anything for inner Paris?
Yes, indirectly but tangibly: the suburbs are becoming more competitive and peripheral arrondissements are losing part of their connectivity advantage. A buyer who hesitated between the 19th arrondissement (8,200 euros/m² median price) and Montreuil (6,200 euros/m²) previously had to accept a significantly longer commute by choosing the suburbs.
With the new lines, the transport gap narrows, making the 2,000 euros/m² price difference harder to justify for Paris.
Peripheral arrondissements, the 12th, 13th, 19th and 20th, must now defend their location advantage against better-connected, cheaper neighbouring municipalities. This does not mean their prices will fall, but that their growth will probably be more moderate than that of municipalities directly benefiting from new stations.
Conversely, the central arrondissements (1st to 8th) are little affected. Their clientele, wealth-oriented, international, attached to a specific address, does not think in terms of commute time to the suburbs.
Does Home Select support purchases outside Paris?
Yes: our 16 property hunters operate in Paris and in the main Île-de-France municipalities. For buyers interested in Grand Paris Express-related opportunities, we analyse each area by cross-referencing transport, planning and market data.
We particularly support buyers in Neuilly-sur-Seine and Boulogne-Billancourt, two western Paris municipalities that will benefit from Line 15 West by 2029.
Contact us for a personalised analysis of your Île-de-France purchase project. Our property hunters know the timelines, urban projects and micro-markets in every area served by the Grand Paris Express.
Sources
Frequently asked questions
01 Which Grand Paris Express lines are open or planned for 2026?
In 2026, the extended Line 14 (Orly to Saint-Denis Pleyel) has been operational since 2024. Line 15 South (Pont de Sevres to Noisy-Champs) opened in late 2025/early 2026. Sections of Lines 16 and 17 towards Le Bourget open during 2026. Line 18 (Massy to Saclay) is expected by the end of 2026. Lines 15 West/East and the remaining sections of Lines 16-17 are planned for 2028-2030.
02 How much do prices increase around new Grand Paris Express stations?
Studies converge: properties located within 500 metres of a new station see their value increase by 10 to 20% in the five years following commissioning. The effect peaks 2 to 3 years before the opening. In some cases (Saint-Denis Pleyel, Villejuif), the rise has reached 25 to 30% since the project was announced.
03 Does the Grand Paris Express have an impact on property within Paris itself?
The impact within Paris is indirect but real. Better suburban connectivity makes neighbouring municipalities more attractive, which diverts some demand away from inner Paris. In return, some peripheral arrondissements (12th, 13th, 19th, 20th) see their price advantage over the nearby suburbs shrink.
04 When should you buy to benefit from a future station's appreciation?
The best window is 2 to 3 years before a station opens, because most of the rise (10 to 20% for a property within 500 metres) is priced in by commissioning. In the most dynamic areas such as Saint-Denis Pleyel or Villejuif, the increase has already reached 25 to 30% since the project was announced; Villejuif alone rose 29% (4,500 to 5,800 euros/m²) between 2019 and 2026. Buying too late, once the station has opened, means paying for appreciation already captured. A property hunter tracking the timeline of the 68 stations can target areas still undervalued.
