Saint Germain Seine Valley

A great place to live and work!

Saint Germain Seine Valley, referred to as CASGBS in French, is a groupment of 19 towns in Greater Paris area, located about 10 km (6 miles) from Paris La Défense skyscrapers. Well connected by road and public transport, our territory concentrates a high proportion of university graduates. It is therefore particularly attractive to high value-added companies and subsidiaries of international groups.

Companies appreciate a greener, human-scale environment and affordable rents while enjoying an easy access to Paris center and other regional economic poles.

Employees and families appreciate our quality of life and international spirit: with over 70 years of experience in welcoming families from abroad, our territory has developed a specific ecosystem with high quality schooling and other services adapted to their particular needs.

Our team will assist you in establishing your company with its employees. We offer personalized advice and useful contacts.

A wide choice of offices are available on fixed or flexible rental terms, often at a third of Parisian prices.

Our advisors are former expatriates who can understand your requirements. Most of our elected representatives are familiar with international matters and have a pragmatic approach to business.

  • Easy access to Paris, both CDG and Orly airports, Normandy Region.
  • Major roads and highways: A13, A14 (express toll highway to Paris), N13, N184, N186.
  • 16 railway or tram stations: RER A, « L » and « J » lines, T2 and T13 tramway lines.
  • RER E Eole (east-west express line) by 2024.
  • 13M€ investment in bike infrastructures: ride your bike to La Defense central business district!


Since the post-war era, our territory has been welcoming international children. A bi-cultural, dual system education is available in 14 languages, within fully private or State-subsidized schools

See full details and advice in the download section.

Here are some direct links to just a few of our many international schools:


The Lycée International (state-owned / Saint-Germain-en-Laye)
Unique in Europe, with bicultural education available in: Danish, Dutch, English (American or British sections), German, Italian, Japanese, Mandarin Chinese, Norwegian, Portuguese, Russian, Spanish and Swedish.

The Lycée International website



The British School of Paris (private / Croissy-sur-Seine)

The British School of Paris is a co-educational British independent day school for pupils aged 3-18. The BSP is the only UK government accredited school in France.

British School of Paris website



Ecole bilingue Suger, in partnership with British Council (Saint-Germain-en-Laye)
Bicultural education half-time in French, half-time in English, from kindergarten to middle school levels, including IGCSE exams. Classes held in small groups, open to non-French or non-English speakers.

Ecole bilingue Suger website



L’Ermitage (Maisons-Laffitte)
Ermitage offers French bilingual programs from age 3 and IB programs from age 11, as well as 5 or 7-day boarding options to pupils aged 11 to 17.

L’Ermitage website



We Love Mômes (Carrières-sur-Seine)
Located two train stops from La Défense, bilingual school English/French, 1 hour of Mandarin per week, Montessori school welcoming children from age 2 to 12.

We Love Mômes website


60 percent of the area covered by « Saint Germain Seine Valley » is natural, our residents enjoy a vast array of outdoor activities. Saint-Germain-en-laye’s forest itself is ten times the size of New York Central Park.

Farmers still cultivate the land and one may buy directly from them, visit farms or purchase fresh products at the nearest open-air market.

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