Property tax in Boulogne-Billancourt in 2026: the lowest rate of the large cities

1. What is the property tax rate in Boulogne-Billancourt in 2026?

The Boulogne notice has a feature few owners notice: the non-municipal lines weigh much more heavily there, in proportion, than anywhere else in Île-de-France.

Those 0,709 point of additional taxes are strictly identical across the whole region: an owner in Saint-Denis pays them to the cent just as an owner in Boulogne does. But in Saint-Denis, where the municipal rate reaches 38,94 %, they represent 1,5 % of the bill. In Boulogne-Billancourt, they account for 4,5 % of it. The less a municipality taxes, the more visible the share it does not control becomes.

The Boulogne household waste collection tax, at 4,15 %, is also remarkably low: the median of the municipalities of the inner suburbs stands at 6,98 %.

2. Is it really the lowest rate of the large cities?

The ranking is worth setting out, because it is counter-intuitive: a town of 119 000 inhabitants is rarely associated with the bottom of a tax league table.

In the Hauts-de-Seine, only two municipalities come below Boulogne-Billancourt: Marnes-la-Coquette, 13,86 % for around 1 700 inhabitants, and Neuilly-sur-Seine, 14,35 %. Puteaux follows at 16,01 % and Courbevoie at 16,58 %. At the other end of the department, Le Plessis-Robinson reaches 37,06 % and Sceaux 35,53 %.

That position is in no way accidental. Boulogne-Billancourt has an exceptionally broad tax base: 452,5 M€ of net bases of property tax on built property in 2024, for 120 954 inhabitants, against 284,3 M€ in Saint-Denis for a comparable number of inhabitants (individual accounts of the municipalities, DGFiP). With a base twice as rich, a rate twice as low produces an equivalent revenue per inhabitant.

3. Why is your notice rising despite a frozen rate?

It is the least understood mechanism of property tax. Your tax is the product of two terms: a rate, voted locally, and a base, set nationally. In Boulogne-Billancourt, only the second has moved.

The 2021 jump is not a Boulogne one: it corresponds to the transfer of the departmental share of property tax on built property to the municipalities, in compensation for the abolition of the residence tax on main residences. Before that reform, the town showed a municipal rate of around 7 %, to which the share of the department was added. Comparing a notice from before 2021 with a current one without neutralising that transfer makes no sense.

The second source of growth is the overall revenue from the tax. The tax receipts of the town rose by more than 40 M€ between 2020 and 2024, under the double effect of the revaluation of the bases and of the entry into the tax base of the new-build programmes of the Trapèze and of the ZAC Billancourt.

4. Why does a pied-à-terre pay four times more?

It is the real tax move in Boulogne of the past five years, and it went unnoticed because it does not affect the majority of the inhabitants.

The lever is far from symbolic in Boulogne-Billancourt, unlike what it is in most suburban towns. The municipality has 4 060 second homes and occasional dwellings, that is 5,9 % of its stock of 68 389 homes (INSEE, the French statistics institute, 2023 census). The net bases of residence tax came to 35,4 M€ in 2024, that is an average base of the order of 8 700 € per home concerned, and the revenue collected by the town reached 8,6 M€.

Measured against the property tax revenue, 68,2 M€ in the same year, it stays a minority. But for the owner concerned, the order of magnitude is quite different: around 2 550 € of residence tax a year on average, to which property tax is added.

5. Simulator: main residence or pied-à-terre

6. How much do you pay according to your profile?

The amounts below are orders of magnitude built from typical profiles anchored on real neighbourhoods of Boulogne-Billancourt and on the prices per m² from our processing of the DVF data, the French notarised sales database. The last column adds together property tax and the surcharged residence tax.

Boulogne-Billancourt is a town of flats almost in the pure state: 96,6 % of its stock of 68 389 homes, against 2,2 % of houses, with 43,5 % of owner-occupiers among the 59 408 main residences (INSEE, the French statistics institute, 2023 census). The few houses, valued at around 14 637 €/m², bear a markedly heavier cadastral rental value, land included, and a property tax well above the orders of magnitude above.

7. Is such a low rate sustainable?

The 2024 accounts of the municipality give the following orders of magnitude: 236,0 M€ of operating income, 231,7 M€ of charges, 20,5 M€ of self-financing capacity, 59,1 M€ of capital expenditure and an outstanding debt of 98,5 M€, against 71,5 M€ a year earlier, that is a rise of 37,7 % over one financial year (individual accounts of the municipalities, DGFiP).

The local debate is less about the main budget than about the commitments carried by the local public development company. The Boulogne press has documented a mortgage of 215,4 M€ on the land of the Île Seguin, loans guaranteed by the town and the department up to 307 M€, and a development scenario resting on an overall sale expected at around 260 M€. Those amounts do not appear in the municipal budget but shape its trajectory.

The municipal election of March 2026 was decided in two rounds. The list led by Pierre-Christophe Baguet gathered 52,13 % of the votes cast, ahead of that of Antoine de Jerphanion at 33,69 % and that of Pauline Rapilly-Ferniot at 14,18 %, for a turnout of 50,65 % out of 73 873 registered voters.

8. What effect on the value of your property in Boulogne-Billancourt?

That is the reading that gives the Boulogne rate its full meaning. The average price of a flat is around 8 384 €/m² (Immover processing, DVF data, the French notarised sales database), with a marked gap between the Jean-Baptiste Clément area, at around 9 276 €/m², and Pont de Sèvres, at around 6 540 €/m². The market peaked at 9 448 €/m² in 2022 before falling back to 8 352 €/m² in 2024, then stabilising.

On a 3-room flat of 65 m² in the town centre, valued at around 545 000 €, a property tax of 910 € represents 0,17 % of the value a year. The same reasoning in Saint-Denis, where the overall rate reaches 39,65 % and where prices are twice as low, gives around 0,45 %. In Nîmes, it comes close to 0,79 %. In other words: the Boulogne property costs a lot to buy, and very little to hold.

That asymmetry has a practical consequence for a seller. On a market where buyers compare monthly payments and running costs, the low cost of ownership is a real argument, but one that does not show in the listing. It gains from being quantified at the time of the viewing, especially against a property located in a neighbouring municipality taxed twice as heavily.

For an investor, the trade-off is the opposite: if the home is not intended to become a main residence, the surcharge of 60 % on the residence tax cuts the net return by around 2 550 € a year on average. That calculation is made before the purchase, not after.

The gaps between neighbourhoods remain the first determinant. Les Princes (+7,5 %), Point du Jour (+6,6 %) and Route de la Reine (+4,6 %) rose over twelve months while the town centre (-1,6 %) and Édouard Vaillant fell back. A valuation calibrated at neighbourhood level is worth more than a municipal average:

For the detail by area, our page property prices per m² in Boulogne-Billancourt gives the price of each of the eleven neighbourhoods covered.