How to read Saint-Germain-en-Laye density?

High density reflects a mature commercial fabric, not necessarily saturated. Compare to national median (~50-80 etabs/1000 inhabitants urban) and look at creation dynamics (SIRENE 12m).

Why not indicate "saturated / not saturated"?

No universal ratio allows a verdict. Saturation depends on business, district, purchasing power (Filosofi income), and recent dynamics. NTYB gives the numbers, you keep the reading.

When does the per-inhabitant ratio not make sense?

For destination retail (car dealer, specialty store) which captures a catchment area larger than the town. Then catchment (vertical /chalandise/) is relevant.

Market saturation in Saint-Germain-en-Laye (78100)

Active business count by trade in Saint-Germain-en-Laye, retail density, top concentrated businesses. To measure the market BEFORE launching — not validate it after.

Population (INSEE)

45 931 inhabitants

Distinct active businesses

417 NAF codes represented

See all trades

Trade	Businesses
Activités immobilières (68.20B)	1 506
Activités immobilières (68.20A)	1 064
Sièges sociaux, conseil de gestion (70.22Z)	958
Activités associatives (94.99Z)	338
Services aux bâtiments et paysagers (81.10Z)	299
Sièges sociaux, conseil de gestion (70.10Z)	291
Activités de poste et courrier (53.20Z)	275
Autres services personnels (96.09Z)	226
Programmation informatique (62.02A)	220
Enseignement (85.59B)	207
Activités immobilières (68.31Z)	193
Activités pour la santé humaine (86.90E)	171

Most represented business

Activités immobilières (68.20B) (1 506 establishments)

Global retail density

279.4 establishments per 1000 inhabitants

"Business / inhabitant" ratio method

The pop/nb_etabs ratio per business is the most used saturation indicator. Common benchmarks: 1 bakery / 2 000 inhabitants (Observatoire Franchise), 1 pharmacy / 2 500 inhabitants (regulation for rural towns), 1 hairdresser / 750 inhabitants. Beyond the raw ratio, look at dynamics (creations / cessions BODACC).

Reading the ratios

Above the trade's benchmark: contested market. Below: room to take. Check the trend with openings and closures over the last 24 months.

Assess your place in the Saint-Germain-en-Laye market?

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FAQ

How to read Saint-Germain-en-Laye density?: High density reflects a mature commercial fabric, not necessarily saturated. Compare to national median (~50-80 etabs/1000 inhabitants urban) and look at creation dynamics (SIRENE 12m).
Why not indicate "saturated / not saturated"?: No universal ratio allows a verdict. Saturation depends on business, district, purchasing power (Filosofi income), and recent dynamics. NTYB gives the numbers, you keep the reading.
When does the per-inhabitant ratio not make sense?: For destination retail (car dealer, specialty store) which captures a catchment area larger than the town. Then catchment (vertical /chalandise/) is relevant.