Sermaise

Identity

Sermaise (INSEE 91593) is in Essonne (91), part of CC le Dourdannais en Hurepoix (CCDH). Population 1,617 (2023). ^[1]

INSEE density class: Petites villes (level 3). ^[2]

Data vintages: INSEE BPE 2025 · INSEE SIRENE 2026-09 · INSEE census (RP) 2023 · INSEE COG 2026 · INSEE density grid 2026.

Permanent link: https://vivantrural.com/en/fr/91593-sermaise

Vitality score

Vitality score 27.8/100 — Few services (model fr-v0.2).

Confidence: high.

Better served than 12 % of the 11,096 communes of a similar size.

Compare this with communes of a similar size. The score measures how well a place is served relative to its own size band, and larger communes score higher as a rule — so it reads meaningfully against another village, and misleadingly against a town.

Measured but not scored in this model: Market. See the methodology for why.

Services

A food shop, a school and somewhere to eat or drink. ^[3,4]

1 × Grocery (épicerie / supérette) (BIOVEGETAL). ^[3,4]

1 × Restaurant (LE PETIT RESTO). ^[3,4]

1 × Nursery school (maternelle) (ECOLE MATERNELLE PUB GEORGES DEBONO). ^[3]

1 × Primary school (élémentaire) (ECOLE ELEMENTAIRE GEORGES DEBONO). ^[3]

1 × Library (BIBLIOTHÈQUE MUNICIPALE). ^[3]

1 × Hairdresser. ^[3,4]

Not counted, because the business register records them as closed: 1 × Hairdresser.

Not found in the commune: Bakery (boulangerie), Butcher (boucherie), Supermarket, Café / bar, GP (médecin généraliste), Pharmacy, Post office / agence postale. ^[3,4]

Market and village life

Market day: unknown — nothing found in the datasets or on the commune website.

Trajectory

Population 1,657 (2012) → 1,617 (2023): -2.4 % over 10 years. ^[5,1]

Population 1,375 (1990) → 1,617 (2023): 17.6 % over 30 years. ^[6,1]

Dwellings (2023): 764, of which 2.4 % second homes and 9.7 % vacant. ^[7]

Access and surroundings

Bakery (Le Val-Saint-Germain): 3.5 km to the north-west (straight line). ^[8]

Food shop (Sermaise): 1.5 km to the south-east (straight line). ^[9]

GP (Saint-Chéron): 3.9 km to the north-east (straight line). ^[10]

Pharmacy (Saint-Chéron): 3.6 km to the north-east (straight line). ^[10]

Primary school (Sermaise): 0.1 km to the south (straight line). ^[9]

Climate

An average of 15 days a year at or above 30 °C and 50 days at or below 0 °C, over 29 complete years in 1995–2024. ^[11]

Measured at the DOURDAN weather station, 6.6 km away at 116 m; the village itself is at 82 m. ^[11]

Muggy days — a dew point at or above 18 °C — average 1 day a summer. ^[11]

Humidity measured at DOURDAN, 6.6 km away at 116 m, over 20 summers. ^[11]

An average of 680 mm of rain a year, spread over 115 days — about 5.9 mm on a day it rains. ^[11]

Rainfall measured at ST-CHERON, 3.9 km away at 146 m. Rainfall is not adjusted for altitude: unlike temperature it has no simple gradient to correct by. ^[11]

What property sold for

127 houses sold between 2021 and 2025, at a median of 295,000 € — 2,368 € per m² of built surface. ^[12]

10 flats sold over the same window, at a median of 115,000 € — 3,036 € per m². ^[12]

The median across Essonne is 3,377 € per m², so this commune sits below it. ^[12]

These are recorded sale prices, not valuations or asking prices, and a median over five years spans five different markets. Built surface excludes land, which carries much of a rural property's value.

Uncertainties

No specific uncertainties flagged.

References

1. INSEE census (RP) 2023 — 91593/2023
2. INSEE density grid 2026
3. INSEE BPE 2025
4. INSEE SIRENE 2026-09
5. INSEE census (RP) 2023 — 91593/2012
6. INSEE census (RP) 2023 — 91593/1990
7. INSEE census (RP) 2023 — 91593/logement/2023
8. INSEE BPE 2025 — 91630
9. INSEE BPE 2025 — 91593
10. INSEE BPE 2025 — 91540
11. Météo-France daily climatology 1995-2024
12. DVF (DGFiP property transactions) 2021-2025