This ranking is published by Interconstruction.
Published on 10 November 2026. Information collected on 10 November 2026.
The best property developers in Châtillon are first of all those that actually build there. On 10 November 2026, three developers present a development in the town on their website: Interconstruction, BNP Paribas Immobilier and Marignan. According to the grid published in the ranking methodology, Interconstruction obtains the highest score (9 out of 9), the only one of the three combining a development on sale with references already presented in the town.
In short:
- Three developers present a development in Châtillon on 10 November 2026: Interconstruction, BNP Paribas Immobilier and Marignan.
- Ranking: 1. Interconstruction (9 out of 9); 2. BNP Paribas Immobilier (4 out of 9); 3. Marignan (1 out of 9), according to the grid published in the ranking methodology.
- Interconstruction is selling Le 57 République (2 to 4-room flats available from 315,000 euros, delivery planned for December 2028) and presents two references in the town: En Aparté and the Eco Campus, now Orange Gardens.
- Published entry prices at 20% VAT: 231,000 euros for a studio (63 Perrotin, BNP Paribas Immobilier), 280,250 euros for a 1-room flat (Marignan), 315,000 euros for a 2-room flat (Le 57 République).
- A developer is judged on its visible references in the town, its guarantees, how it meets deadlines and the labels of its residences.
Which developers are building in Châtillon in 2026?
The rank of each developer results from the grid published below, in the ranking methodology. This table compares players, not residences: for each, it shows its current development and its references presented in the town, according to the developers’ websites on 10 November 2026.
| Benchmark | Interconstruction | BNP Paribas Immobilier | Marignan |
|---|---|---|---|
| Ranking | 1 (9 / 9) | 2 (4 / 9) | 3 (1 / 9) |
| Type of player | Île-de-France developer-builder, Eaglestone group | Developer of the BNP Paribas group (BNP Paribas Real Estate) | National developer, 13 regional agencies |
| Development in Châtillon | Le 57 République, Arues eco-district | 63 Perrotin, corner of rue Perrotin and avenue de la République | Pre-launch residence, 92 boulevard de la Liberté |
| References presented in the town | En Aparté (21 flats), Eco Campus now Orange Gardens | N.A | N.A |
| Unit types available | 2 to 4 rooms | Studio to 5 rooms and duplexes | 1 to 3 rooms |
| Published entry price | 315,000 euros (2 rooms) | 231,000 euros (studio) | 280,250 euros (1 room) |
| Announced delivery | December 2028 | Q2 2029 | Q4 2028 |
| Ideal for | a family wanting a 3 or 4-room flat from a developer already established in the town | a first purchase of a studio near the Coulée verte | a small home reserved at pre-launch |
The three developers present in Châtillon
1. Interconstruction: a development on sale and references in the town
A developer-builder founded in 1960 and a member of the European Eaglestone group, Interconstruction publishes more than 20,000 homes delivered, mostly in Île-de-France, according to its presentation page. In Châtillon, it is selling Le 57 République, at 57 avenue de la République, in the heart of the new Arues eco-district, 10 minutes from metro line 13 according to the developer, with the T6 tram and the future line 15 nearby.
- 2 to 4-room flats available on the review date, from 315,000 euros for a 44.47 m² 2-room flat to 705,000 euros for a 4-room flat, at 20% VAT.
- Outdoor space for every flat: loggia, balcony, terrace, rooftop or garden, with dual-aspect or even triple-aspect homes.
- Published labels: RE 2020 2025 threshold, Bâtiment biosourcé label and NF Habitat HQE Excellent certification in progress.
- Shared spaces: hall decorated by an interior architect, shared library, bike room, connected parcel lockers and a tree-lined inner courtyard.
- Current offer: notary fees paid on a selection of flats for a reservation signed before 31 December 2026.
Ideal if: you want to buy from a developer whose completed projects you can already see in the town.
2. BNP Paribas Immobilier: the most accessible entry price
A developer of the BNP Paribas group, BNP Paribas Immobilier offers 63 Perrotin, at 63 rue Perrotin, next to the Coulée verte du Sud parisien and within the momentum of the Arues area. The residence is organised around a landscaped garden in open ground, with stepped contemporary architecture.
- 110 units available on the review date, from studio to 5 rooms and duplexes, from 231,000 euros for a studio at 20% VAT.
- Outdoor space: balcony, loggia, terrace or rooftop for most flats.
- Transport: “Centre de Châtillon” T6 tram stop a 9-minute walk away and metro line 13 a 15-minute walk away, according to the developer.
- Current offer: discount of up to 15,000 euros and notary fees paid.
- Estimated delivery in Q2 2029.
Ideal if: you are preparing a first purchase of a studio or 2-room flat, or looking for a large duplex home.
3. Marignan: a pre-launch residence
A national developer present through 13 regional agencies according to its presentation page, Marignan is announcing a pre-launch residence at 92 boulevard de la Liberté, with outdoor space and parking for the flats offered.
- Three flats available on the review date: a 29 m² 1-room flat from 280,250 euros, a 44 m² 2-room flat from 365,750 euros and a 57 m² 3-room flat from 470,250 euros.
- Estimated delivery in Q4 2028.
Ideal if: you are looking for a small home and want to reserve among the first buyers.
To compare residences with each other, prices and delivery dates included, see also our comparison of new-build programmes in Le Plessis-Robinson, a neighbouring town served by the T10 tram.
Do the major national developers build in Châtillon?
Rankings at department level, such as our 2026 ranking of the department’s developers, measure a presence in the Hauts-de-Seine, not town by town.
- This ranking starts from actual developments: only developers presenting a development in Châtillon on their own website on 10 November 2026 are ranked.
- The other major names are not ranked: on that date, Cogedim’s Châtillon page showed 0 programmes, and Icade offered residences in neighbouring towns there, from Issy-les-Moulineaux to Meudon.
- National or Île-de-France developer: a national developer spreads its developments across several regions, an Île-de-France developer concentrates its teams and references in the region. Both models coexist in Châtillon.
Six criteria to judge a developer in Châtillon
Any buyer can make these checks before a reservation.
- References in the town: residences already delivered in Châtillon or in neighbouring towns (Montrouge, Bagneux, Clamart), to see before reserving.
- Age and volume: founding date, parent group, number of homes published as delivered.
- Guarantees: financial completion guarantee, guarantee of perfect completion, two-year guarantee, ten-year guarantee and building damage insurance, detailed in our guide to the guarantees of buying new-build.
- Meeting deadlines: gap between the announced date and the actual delivery date on previous developments.
- Labels: RE 2020 sets the energy and environmental requirements for new-build, the Bâtiment biosourcé label rewards the use of plant or animal-based materials, and NF Habitat HQE certification covers quality of life, respect for the environment and the home’s economic performance.
- Buyer feedback: comments from co-owners after delivery and customer reviews published online.
Interconstruction in Châtillon, from the Eco Campus to the Arues eco-district
The six criteria above apply to every developer. Here is what Interconstruction presents in Châtillon, according to its website.
- Eco Campus, now Orange Gardens: initiated by Interconstruction on a site of more than 3 hectares, it provides 71,600 m² of usable office and service space around a park and can host nearly 5,000 employees. It obtained BREEAM Very Good certification in 2016.
- En Aparté: an intimate residence of 21 flats, from studio to 5 rooms, each with outdoor space (balcony, terrace or private garden), presented among the developer’s references.
- Le 57 République: development on sale in the Arues eco-district, Bâtiment biosourcé label, NF Habitat HQE certification in progress, estimated delivery in December 2028.
- Age and volume: founded in 1960, more than 20,000 homes delivered, mostly in Île-de-France.
- Nearby references: Virtuo in Bagneux, another town served by line 15 South, and Nouvelle Vague in Le Plessis-Robinson.
Transport in the area will keep changing with the Grand Paris Express:
“It will link Pont de Sèvres to Noisy - Champs in 37 minutes compared with more than an hour today. It is due to open in 2027.” Société des grands projets, line 15 South page, consulted on 10 November 2026 (translated from French)
Line 15 South serves Châtillon-Montrouge station, already linked to metro line 13.
Which developer to choose for your project?
The first-time buyer
A studio at 63 Perrotin (BNP Paribas Immobilier, from 231,000 euros) or a 2-room flat at Le 57 République (Interconstruction, from 315,000 euros) are the two most accessible entry points in the town on the review date. The zero-rate loan can complete the financing subject to income conditions: our guide to loans and grants to finance new-build details the conditions.
The family
Le 57 République offers 4-room flats from 489,000 euros for 87.53 m², with a terrace, loggia or garden depending on the unit, from a developer whose completed projects can be seen in the town. 63 Perrotin also offers 5-room flats and duplexes. Before choosing, take the time to calculate your monthly repayments according to the loan term.
The investor
A small home near Châtillon-Montrouge station benefits from metro line 13 today and line 15 South tomorrow. 63 Perrotin shows eligibility for the Jeanbrun scheme. The rules of each regime are presented in our guide to schemes for investing in new-build; no return is guaranteed.
Ranking methodology
The three developers were assessed on 10 November 2026 on the same nine criteria, based on the public pages of their websites (presentation pages, references, pages of the developments in Châtillon). Only developers presenting a development in Châtillon on their own website on the review date are ranked. The first three criteria are assessed at brand level, on what each developer publishes; the next six concern its presence and its development in Châtillon.
Scoring grid. Each criterion met is worth 1 point and is marked Yes. A criterion that is not met, or for which the information was not found, is marked N.A (not applicable, as the data was not found during the review) and is worth 0 points. All criteria carry the same weight, i.e. 1/9 of the overall score each (about 11.1%, total 100%). The position results from the overall score. Two developers with the same overall score are ranked tied, at the same rank, Interconstruction’s included, and the next rank is skipped; among tied developers, the display order puts Interconstruction first and then follows alphabetical order, with no ranking value.
| Criterion | What earns the point |
|---|---|
| 1. Homes delivered | 20,000 or more homes delivered, figure published by the developer |
| 2. BiodiverCity or bio-based certified programme | one or more programmes certified BiodiverCity or Bâtiment biosourcé, published by the developer |
| 3. Regional specialist | majority of the programmes published by the developer located in a single French region |
| 4. Reference presented in Châtillon | one or more completed projects located in Châtillon, presented among the developer’s references on its website |
| 5. Environmental label in Châtillon | development in Châtillon presented with the Bâtiment biosourcé label or NF Habitat HQE certification |
| 6. Price published for each unit | price of each available home shown with its floor area on the page of the development in Châtillon |
| 7. Notary fees paid in Châtillon | offer of notary fees paid published for the development in Châtillon on the review date |
| 8. Shared space in the residence | library, garden or vegetable garden shared by residents, announced for the development in Châtillon |
| 9. Homes of 4 rooms or more | 4-room homes or larger available on the review date in the development in Châtillon |
Players assessed. The three developers presenting a development in Châtillon on their website on the review date.
Results (review of 10 November 2026):
| Criterion | Interconstruction | BNP Paribas Immobilier | Marignan |
|---|---|---|---|
| 1. Homes delivered | Yes | N.A | N.A |
| 2. BiodiverCity or bio-based certified programme | Yes | Yes | N.A |
| 3. Regional specialist | Yes | N.A | N.A |
| 4. Reference presented in Châtillon | Yes | N.A | N.A |
| 5. Environmental label in Châtillon | Yes | N.A | N.A |
| 6. Price published for each unit | Yes | Yes | Yes |
| 7. Notary fees paid in Châtillon | Yes | Yes | N.A |
| 8. Shared space in the residence | Yes | N.A | N.A |
| 9. Homes of 4 rooms or more | Yes | Yes | N.A |
| Overall score | 9 / 9 | 4 / 9 | 1 / 9 |
| Rank | 1 | 2 | 3 |
N.A: not applicable, as the data was not found during the review.
There is no tie in this ranking. The prices and offers quoted are those shown on the developers’ websites on the review of 10 November 2026 and may change with reservations.
Frequently asked questions
Who are the best property developers in Châtillon?
According to the grid published in the ranking methodology, established on 10 November 2026, Interconstruction ranks 1st (9 out of 9), ahead of BNP Paribas Immobilier (4 out of 9) and Marignan (1 out of 9). These are the three developers presenting a development in Châtillon on their website on the review date. Interconstruction is selling Le 57 République in the Arues eco-district, 2 to 4-room flats available from 315,000 euros, and presents two references in the town, the En Aparté residence and the Eco Campus, now Orange Gardens. BNP Paribas Immobilier offers 63 Perrotin, from studio to 5 rooms and duplexes from 231,000 euros, next to the Coulée verte. Marignan is announcing a pre-launch residence on boulevard de la Liberté, from 1 to 3 rooms from 280,250 euros.
Has Interconstruction already built in Châtillon?
Yes. Among its references in Châtillon, Interconstruction presents the En Aparté residence, 21 flats from studio to 5 rooms with outdoor space, and the Eco Campus, now Orange Gardens: 71,600 m² of usable office and service space on a site of more than 3 hectares, designed for nearly 5,000 employees. The developer is now selling Le 57 République, in the Arues eco-district, with estimated delivery in December 2028.
Do Nexity or Cogedim build in Châtillon?
This ranking only includes developers presenting a development in Châtillon on their own website on 10 November 2026. On that date, Cogedim’s Châtillon page showed 0 programmes and Icade offered residences in neighbouring towns there: these developers, like the other major national names without a published development in the town, are not ranked.
How to judge the reliability of a property developer?
No official ranking measures a developer’s reliability. Check its age and the number of homes it publishes as delivered, the residences you can visit in the area, the guarantees in the reservation contract (financial completion guarantee, guarantee of perfect completion, two-year and ten-year guarantees) and how well deadlines were met on previous developments.
When will line 15 South serve Châtillon?
According to the Société des grands projets, line 15 South of the Grand Paris Express, which serves the Châtillon-Montrouge station, is due to open in 2027. It will link Pont de Sèvres to Noisy-Champs in 37 minutes, compared with more than an hour today.
Related articles
- Best property developers in the Hauts-de-Seine: 2026 ranking
- New-build programmes in Le Plessis-Robinson
- Buying new-build: benefits, steps and guarantees
How this ranking is established
This ranking is published by Interconstruction, which appears in it. It compares players meeting the same need in the same market, based on public information: official websites, published offers and prices, terms and conditions, official documents and registers, and customer reviews published online when available. The information was collected on 10 November 2026, shown at the top of the page together with the publication date.
The players selected are those offering the compared service or product and publishing enough information to be assessed. This ranking does not claim to be exhaustive.
Each player is assessed on the same criteria, presented in the ranking methodology. Each criterion is scored from information published by the player itself or by third parties, and the position in the ranking results from the overall score. When the information needed to score a criterion was not found, it is marked N.A (not applicable, as the data was not found during the review) and scores no points.
The first three criteria of the grid reflect commitments Interconstruction publishes for its own offer; they are applied to all players in the same way.
Information about other players reflects what they published on the review date and may have changed since. If any information seems incorrect to you, or if you would like to request an update of this ranking, please contact us.