A town with more to fix than most. Prices are high against local incomes: at the median price, a 70 m² home costs 8.7 times the median annual income per consumption unit in the intercommunality. Sannois’s overall grade of C− puts it better than 17% of compared French towns, #44 of 73 in Val-d'Oise. It lags on schools as well (D): bac results 2.4 points below the expected rate; brevet results 1.9 points below the expected rate. Its strongest is walkability: 100% of residents live within 800 m of a bakery, and 51% of working residents walk, cycle or take public transport to work.
Hazard risk isn’t graded in France yet: national flood maps cover only some areas. The overall grade uses the other six subjects.
Each subject compares Sannois with other French towns of 2,500 or more, ordered by how far its rank is from the middle. American and UK towns are graded separately.
Data highlights are ordered by what stands out in Sannois.
Work & commuteJobs & income C
A walkable place: Sannois beats 98% of compared French towns on foot
For its 12,300 residents in work, Sannois has 5,250 jobs: 0.4 each. The median disposable income was €27,400 a year per consumption unit, below Val-d'Oise’s towns (€28,800) but above compared French towns (€25,970). Just over a tenth of people in the labour force have no job.
51%walk, cycle or take transit
How working residents got to work · census 2023
Public transport44%
Driving44%
On foot4%
Motorbike or scooter3%
Bicycle2%
5,250
jobs based in Sannois, 0.4 per working resident
10.8%
unemployment rate, ages 15 to 64 in the labor force · median of compared French towns 10.1%
€27,400
median annual income per consumption unit, 2023 · median of compared French towns €25,970
3%
worked without traveling (at or from home)
A+
Walkability: better than 98% of compared French towns
Source: INSEE, census 2023 (commuting, employment, jobs at place of work); INSEE, Filosofi 2023 · Licence Ouverte
HousingCost of living D
Renting in Sannois costs more than in Val-d'Oise’s towns and across compared French towns, at an estimated advertised €19.82/m² a month
Rents are the ministry’s estimates of advertised rents, not rents actually paid.
At the median, a home went for €3,626/m², above both Val-d'Oise’s towns (€3,266/m²) and compared French towns (€2,430/m²). The split in Sannois: €4,256/m² for houses, €3,246/m² for apartments. This Val-d'Oise town recorded 722 home sales from July 2023 to June 2026.
€3,626/m²median sale price
Median sale price per m² · Jul 2023 to Jun 2026
Sannois€3,626/m²
Median of towns€2,430/m²
Val-d'Oise median€3,266/m²
By type
Median per m²
Sales
Houses
€4,256/m²
289
Apartments
€3,246/m²
433
€19.82/m²
estimated advertised apartment rent a month, charges included (€16.44 to €23.90/m² a month)
8.7
times the median annual income per consumption unit in the intercommunality, for 70 m² at the median price
€17.64/m²
estimated advertised house rent a month, charges included
€29,070
median annual income per consumption unit, Communauté d'agglomération Val Parisis
Source: DGFiP, DVF property sales (Etalab geolocated); Housing Ministry, Carte des loyers 2025; INSEE, Filosofi 2023 · Licence Ouverte
Schools
Schools around Sannois do less well than those of 85% of compared French towns
Primary schools aren’t graded: France doesn’t publish their results by school.
The brevet pass rate near Sannois is 83.3%, about level with Val-d'Oise’s towns (82.7%) and below compared French towns (87.5%). The bac pro: 79% of 1,322 candidates passed at the 13 vocational lycées within 5 km. For exam results, it comes #26 of 76 in Val-d'Oise.
89%passed the bac (general and technological)DSchool Grade
Ministry of Education (DEPP) · brevet and bac 2025, value added (IVAC, IVAL) · Licence Ouverte
Who lives here
A younger town: only 15% of residents are 65 or over
Children are a fifth of the town. Just over a tenth of the population is aged 15 to 24, about level with Val-d'Oise’s towns (12%) and above compared French towns (11%). Degrees are held by 39% of adults.
38.2median age
SannoisVal-d'Oise medianFrance median
Ages · share of residents
12%
Under 1515–2425–4445–6465+
Highest diploma · residents 15 and older who have left education
No diploma17%
CAP or BEP20%
Baccalauréat18%
Higher education39%
Women and men · all residents
52% women, 48% men
WomenFrance medianMen
About 92 men for every 100 women. Median share of women: Val-d'Oise 51.5%, France 51.8%.
INSEE, census 2023 · Val-d'Oise median and France median: the median of compared communes
Safety
Crime per resident in Sannois is higher than in 67% of compared French towns
Among the graded crimes in Sannois, the most frequent was criminal damage (2025). Graded property crimes ran at 18.1 per 1,000 residents a year, and violence against people at 7.4 (2023–2025 average). Police and gendarmerie recorded 595 offenses here in 2025.
7.4recorded violent incidents per 1,000 residents a yearCSafety Grade
Recorded by type · 2025
Criminal damage203
Family violence92
Theft from vehicles81
Vehicle theft68
Other physical violence64
Burglary56
Sexual violence31
Fraud232
Theft without violence209
Drug use69
Not in the gradeTheft without violence, drug use and fraud are shown for information but left out of the Safety Grade, which counts violence plus burglaries, vehicle thefts, thefts from vehicles and criminal damage per resident.
7.4
recorded violent incidents per 1,000 residents a year, 2023–2025 average
18.1
recorded burglaries, vehicle thefts, thefts from vehicles and acts of criminal damage per 1,000 residents a year, 2023–2025 average
595
offenses recorded in the graded categories in 2025
0.2%
of the index rests on the département’s average, used where small counts aren’t published
Source: SSMSI (Interior Ministry), recorded crime by commune, 2023–2025 · Licence Ouverte · When armed robbery number five or fewer in a recent year, the figure is withheld, and the index uses the département’s average instead (0.2% of the index here). The count covers the offense categories the Safety Grade uses.
HealthHealth B+
Sannois gets a B+ for health
Care access and life expectancy are shown for context, not graded.
Its two care homes for older people (80 places) count their residents as Sannois’; allowing for them, deaths were 18% below expected. France’s death rates at each age would predict 1,837 deaths in the town from 2016 to 2025; there were 1,580, 14% fewer. Women in Val-d'Oise live to 85.9 on average and men to 81.1 (2025), against 85.9 and 80.3 across France. For a family doctor, residents of Sannois can choose among 13 GPs.
−18%deaths against expected, after care homesB+Health Grade
Deaths per 100 expected · 2016–2025
Raw86
Adjusted82
Median town88
Expected100
13
GPs in Sannois · 2.3 GP consultations a year per resident within reach (APL)
0.7 mi
to the nearest emergency department, Clinique Claude Bernard
0.7 mi
to the nearest maternity unit, Clinique Claude Bernard
85.9 · 81.1
years of life expectancy at birth, women · men, Val-d'Oise, 2025 (provisional) · France 85.9 · 80.3
Sannois has 1 historic monument, none of them classé
France has no History Grade yet: this card describes, it doesn’t grade.
Protection here reaches back to the 18th century. 4.2% of its homes were built before 1919, near Val-d'Oise’s towns (4.1%) and lower than compared French towns (7.4%).
People: INSEE, census 2023. Miles: center to center.
Questions about Sannois
Is Sannois safe?
It grades C for safety, #37 of 73 in Val-d'Oise. In 2025 police and gendarmerie recorded 56 burglaries and 203 acts of criminal damage.
Are schools in Sannois good?
They grade D, better than 15% of compared French towns and #26 of 76 in Val-d'Oise. The lycée stands out: 100% of 186 candidates passed the bac at Lycée Notre-Dame in 2025, a point above the expected rate given its pupils’ backgrounds. Primary schools aren’t graded: France doesn’t publish their results by school.
Is Sannois expensive to live in?
Incomes are higher than in most compared French towns, so Sannois grades D for cost of living.
About Sannois
Commune in Val-d'Oise, Île-de-France
Sannois is a commune of 26,924 people in the Communauté d'agglomération Val Parisis. TownRatings compares communes, France’s local unit: each has its own mayor and its own statistics. Its area takes in the town and the countryside around it.
Built from INSEE’s 2026 official geography (COG) and IGN Admin Express boundaries
Contains public sector information under the Licence Ouverte / Open Licence 2.0 (Etalab): INSEE, DGFiP, the Interior Ministry’s statistics service (SSMSI), the Ministry of Education (DEPP), the Health Ministry’s statistics service (DREES) and the Housing Ministry (Carte des loyers). Commune boundaries: IGN Admin Express.
