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© 2026 cohaga AG · All Rights Reserved · St. Gallen, Switzerland · Imprint745,937 companies indexed · Last updated: today
DirectoryConstruction & ArchitectureArchitecture FirmsCourtételleBureau d'étude Jean Chatelain S.à r.l.
Bureau d'étude Jean Chatelain S.à r.l. Logo
Verified· 2 sourcesTrust Score
Summary

About the company

Bureau d'étude Jean Chatelain S.à r.l. is a planning and architectural practice that develops architectural concepts, renovation works and new-build projects. The practice provides consulting, project management and designs for energy-efficient buildings (Minergie, CEL‑EN=0) and seeks to involve stakeholders throughout the project process.

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Offering

Products & services

Industry:Architecture Firms
✓ Offered5
Architecture
Architectural concepts, renovation, conversion and building extensions; comprehensive services from design through to handover of the building, with management of warranties.
Land-use planning
Land-use planning and regional planning, with a combined architecture–territory approach to handle projects and involve stakeholders.
Building renovations and transformations
Renovations, conversions and repurposing of existing buildings; grand residences, shops, public facilities, housing and heritage buildings.
Minergie construction and projects
New builds and Minergie-certified renovations, with energy optimisation, comfort and compliance with performance standards.
Comprehensive construction services
Tailored advice, project coordination, monitoring of economic and ecological aspects, compliance with deadlines, handover of the building and management of warranties.
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4.1/5

Bureau d'étude Jean Chatelain S.à r.l.

Trust & reputation

ranQ Trust Score of Bureau d'étude Jean Chatelain S.à r.l.: 4.1 out of 5.0

Trust Score4.1/ 5.0

High

x

Data basis 54% · As of October 2026

Without public customer reviews the score stays capped.

Bureau d'étude Jean Chatelain S.à r.l. has no value in the Reputation area of the ranQ Trust Score because no data is available. The area carries 42% of the weighting and drops out of the calculation for this profile; it does not lower the score, only the reported data basis.
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CriterionValueWeight
  • Review quality: No data point — the criterion is taken out of the weighting and does not lower the score.—24%
  • Review volume: No data point — the criterion is taken out of the weighting and does not lower the score.—10%
  • Review recency: No data point — the criterion is taken out of the weighting and does not lower the score.—8%
Bureau d'étude Jean Chatelain S.à r.l. scores 84.6 out of 100 points in the Substance area of the ranQ Trust Score. This area carries 28% of the weighting.
x
CriterionValueWeight
  • Establishment: Years since founding or brand launch, logarithmic. The maximum is reached at 15 years.100.012%
  • Company size: The headcount band, researched by ranQ or stated by the company. It is scored in steps rather than by head count, because the data only provides bands.55.07%
Bureau d'étude Jean Chatelain S.à r.l. scores 85.0 out of 100 points in the Identity area of the ranQ Trust Score. This area carries 22% of the weighting.
x
CriterionValueWeight
  • Verification: Official register entry (commercial register with UID or professional-body record, 55 points), confirmed domain (20 points) and confirmed ranQ profile (up to 25 points, depending on completeness).85.022%
Bureau d'étude Jean Chatelain S.à r.l. scores 71.4 out of 100 points in the Visibility area of the ranQ Trust Score. This area carries 8% of the weighting.
x
CriterionValueWeight
  • Website authority: Ahrefs' Domain Rating measures, on a scale of 0 to 100, how strongly a website is linked from other websites. For Swiss SMEs the range up to 40 is typical; the maximum is reached at 35.71.44%
  • Media authority: No data point — the criterion is taken out of the weighting and does not lower the score.—4%
Qualifications+0.00

Bureau d'étude Jean Chatelain S.à r.l. reaches a ranQ Trust Score of 4.1 out of 5.0 — rated «High». No public customer reviews are available for this provider; the rating is based on the remaining criteria. The data basis is 54%, so the score is backed by part of the criteria. As of October 2026.

The Trust Score cannot be bought and is calculated from publicly verifiable data.

Knowledge

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Location

Rue Saint-Randoald 8
2852 Courtételle
Opening hours
Mon
07:30 - 12:00, 13:30 - 17:00
Tue
07:30 - 12:00, 13:30 - 17:00
Wed
07:30 - 12:00, 13:30 - 17:00
Thu
07:30 - 12:00, 13:30 - 17:00
Fri
07:30 - 12:00, 13:30 - 17:00
Sat
07:30 - 12:00, 13:30 - 17:00
Sun
07:30 - 12:00, 13:30 - 17:00

At a glance

Legal form
Limited Liability Company
UID
CHE-105.120.445
Founded
1999 · 27 years
Last commercial register change
August 31, 2016
Employees
1 to 10
Legal form: Graded by liability and disclosure. The weight is kept small: a sole proprietorship is not a dubious company, it is just liable differently.88.06%
  • Branch offices: Branch offices linked in the commercial register. Having none is normal and costs no points.85.03%
    • Full methodology

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