Price of a 4-room apartment (T4) in L'Isle-Adam
In L'Isle-Adam, the median price of a T4 is €3,423/sq.m, i.e. about €277,263 for an average area of 81 sq.m. Data from actual DVF transactions by the DGFiP (24 sales over the 12 months ending 31 December 2025).
Price range (T4)
What DVF sales say about the price of a T4 in L'Isle-Adam
On price per sq.m the T4 holds position 5th among the 6 property types L'Isle-Adam measures, and position 4th on twelve-month volume. The 24 T4 sales recorded over 12 months weigh about 13% of the 178 apartment and house sales in the town. The median price, €3,423/sq.m, falls in the lower third of the town's apartment price range, from the 1st to the 3rd quartile. Apartments sold in the town average 57 sq.m, against 81 sq.m for the T4, about 41% more. Among the neighbouring towns tracked by Briveo that measure the same property type, Montmorency comes out at €3,625/sq.m, about 6% above, and Sarcelles at €1,875/sq.m, about 45% below. For all of the town's apartments, whatever their number of rooms, DVF sales published by the DGFiP show the median price per sq.m moving +9% over one year.
Observed sale prices of a T4 in L'Isle-Adam
Of the sales of a T4 à L'Isle-Adam, half closed between 223,000 € and 490,000 €, for a median price of 296,000 €.
Half of the T4 sold measure between 71 and 88 sq.m.
Three years of sales
| Year | Sales | Median per sq.m |
|---|---|---|
| 2023 | 19 | €4,288/sq.m |
| 2024 | 18 | €3,235/sq.m |
| 2025 | 24 | €3,804/sq.m |
Between 2023 and 2025, the median price per sq.m of a T4 went from 4,288 € to 3,804 €, −11.3 %.
Source and method
- Property transfer records (DVF), published by the French tax authority (DGFiP)
- Sales recorded from 1 January 2023 to 31 December 2025
- Based on 24 sales
- Figures computed on 30 October 2026
The town
L'Isle-Adam covers 14.9 km², lies between 23 and 113 m above sea level and had 12,493 inhabitants in the 2023 census.
L'Isle-Adam is a town in the Île-de-France region, in the north-centre of Val-d'Oise, situated on the left bank of the Oise, twenty-five kilometres as the crow flies north-north-west of the gates of Paris, around ten to the north-east of Pontoise, and thirty-five to the south of Beauvais. It forms, together with Parmain, the neighbouring commune on the right bank of the Oise, a small urban area of approximately 16,000 inhabitants. Its residents are known as the Adamois.
The full property page of the town
From Wikidata and the Wikipedia article « L'Isle-Adam », licensed CC BY-SA 4.0, read on 13 October 2026. Translated from the French article. Read the article
Other property types in L'Isle-Adam
Price of a T4 in nearby cities
Cities tracked by BRIVEO in the same department, median for the same property type when available.
Frequently asked questions, T4 in L'Isle-Adam
Q1What is the price of a T4 in L'Isle-Adam in 2026?
In L'Isle-Adam, the median price of a T4 is €3,423/sq.m, with a range of €3,088 to €5,352/sq.m (1st to 3rd quartile), based on DVF sales published by the DGFiP.
Q2What budget for a T4 of 81 sq.m in L'Isle-Adam?
For the average observed area (81 sq.m), the indicative budget goes from about €250,128 (1st quartile) to €433,512 (3rd quartile), around €277,263 at the median price. Indicative calculation, DVF price per sq.m multiplied by the area, excluding notary fees.
Q3How does the price of a T4 compare with apartments in L'Isle-Adam?
The median price of a T4 in L'Isle-Adam is about 20% below the city's apartment median (€4,259/sq.m), based on DVF sales published by the DGFiP.
Q4How many T4 sales in L'Isle-Adam?
The DGFiP DVF database records 24 sales of this type in L'Isle-Adam over the last 12 months.