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© 2026 cohaga AG · All Rights Reserved · St. Gallen, Switzerland · Imprint745,887 companies indexed · Last updated: today
DirectoryBusiness & Technical ServicesTechnical Consulting & EngineeringCottens VdBureau 9.81 ingénieurs conseils Sàrl
Bureau 9.81 ingénieurs conseils Sàrl Logo
Verified· 2 sourcesTrust Score
Summary

About the company

Bureau 9.81 ingénieurs conseils Sàrl is a civil engineering firm providing structural engineering services including reinforced concrete, timber and metal construction, site development, drainage and earthworks, and other civil engineering tasks. The firm performs assessments of existing structures, seismic expertise, extensions and renovations, and supplies construction management, financial monitoring and fire-protection specialist services, from ad hoc advice to complete studies.

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Products & services

Industry:Technical Consulting & Engineering
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3.9/5

Bureau 9.81 ingénieurs conseils Sàrl

✓ Offered8
Civil engineering
Civil engineering for new and existing buildings, from ad hoc consulting to full studies, including load-bearing structures, earthworks, drainage pipes and external developments.
Structural engineering
Structural engineering for new and existing buildings, with dimensioning and design in reinforced concrete, timber and steel construction.
Building transformation and renovation
Transformation of villas, apartment blocks, farms and listed buildings, with structural adaptations, openings in load-bearing walls and extensions in timber or other materials.
Local construction management
On-site construction management for construction projects, coordination of execution and monitoring of SIA phases 41, 51, 52 and 53.
Structural assessments and static checks
Expert assessments of existing structures, static checks and seismic analyses for buildings, underground garages and metal structures.
Fire protection
Fire protection specialist for construction and transformation projects, with recognized expertise within the team.
Property water management
Drainage pipes and management of on-site waters, in particular for construction, transformation and external development projects.
Earthworks and external developments
Earthworks and external developments integrated into building projects, with base works and interventions on the surrounding areas.
Trust & reputation

ranQ Trust Score of Bureau 9.81 ingénieurs conseils Sàrl: 3.9 out of 5.0

Trust Score3.9/ 5.0

High

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Data basis 54% · As of October 2026

Bureau 9.81 ingénieurs conseils Sàrl 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 9.81 ingénieurs conseils Sàrl scores 61.5 out of 100 points in the Substance area of the ranQ Trust Score. This area carries 28% of the weighting.
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CriterionValueWeight
  • Establishment: Years since founding or brand launch, logarithmic. The maximum is reached at 15 years.50.012%
  • 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 9.81 ingénieurs conseils Sàrl scores 83.3 out of 100 points in the Identity area of the ranQ Trust Score. This area carries 22% of the weighting.
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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).83.322%
Bureau 9.81 ingénieurs conseils Sàrl scores 51.4 out of 100 points in the Visibility area of the ranQ Trust Score. This area carries 8% of the weighting.
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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 35.51.44%
  • Media authority: No data point — the criterion is taken out of the weighting and does not lower the score.—4%
Qualifications+0.00

Bureau 9.81 ingénieurs conseils Sàrl reaches a ranQ Trust Score of 3.9 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

Route de Grancy 19 bis
1116 Cottens Vd

At a glance

Legal form
Limited Liability Company
UID
CHE-293.593.971
Founded
2023 · 3 years
Last commercial register change
June 19, 2024
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.70.03%
    • Full methodology

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