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© 2026 cohaga AG · All Rights Reserved · St. Gallen, Switzerland · Imprint745,887 companies indexed · Last updated: today
DirectoryConstruction & ArchitectureCivil Engineering FirmsSierreBISA - Bureau d'Ingénieurs SA
BISA - Bureau d'Ingénieurs SA Logo
Verified· 3 sourcesTrust Score
Summary

About the company

BISA - Bureau d'Ingénieurs SA is an engineering firm providing civil engineering studies, design and project management for road and transport infrastructure, structural and seismic engineering, land‑use planning, environmental and mobility projects, fire‑safety consulting and water/wastewater treatment.

AI-generated
Offering

Products & services

Industry:Civil Engineering Firms
✓ Offered5
Civil engineering
Planning and design of road alignments, layout of intersections and roundabouts, road infrastructure, road safety, maintenance management for roadways, support to the client.
Structures and seismic engineering
Bridges, structures and civil engineering works, covered trenches, tunnels and underground works, reinforced concrete, steel or timber structures, seismic calculations, special works and conservation of structures.
Spatial planning
Spatial planning studies, municipal and regional plans, zoning plans, detailed planning plans, district plans, equipment and infrastructure programmes, administrative and legal support.
Environment and mobility
Renovation and renaturalisation of watercourses, GEP (PGEE), master plans for drinking and wastewater, irrigation networks, hydraulic engineering projects, transport planning, traffic management and noise studies.
Safety
Fire protection concepts, follow-up of projects, inspections, regulatory compliance, evacuation plans, municipal checks, CFST occupational safety and asbestos diagnostics.
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4.2/5

BISA - Bureau d'Ingénieurs SA

Trust & reputation

ranQ Trust Score of BISA - Bureau d'Ingénieurs SA: 4.2 out of 5.0

Trust Score4.2/ 5.0

Very high

x

Data basis 96% · As of October 2026

BISA - Bureau d'Ingénieurs SA scores 70.0 out of 100 points in the Reputation area of the ranQ Trust Score. This area carries 42% of the weighting.
x
CriterionValueWeight
  • Review quality: The average rating across all connected sources, smoothed against the industry mean. So 5.0 stars from three reviews do not outrank 4.7 from three hundred.78.624%
  • Review volume: The number of reviews across all sources. The scale is logarithmic: the first reviews count the most, and the maximum is reached at 50 reviews.65.210%
  • Review recency: The age of the most recent review. Two-year-old reviews deliberately sit in the middle, because that is normal for Swiss SMEs. Only after three years without a new voice does the value drop markedly.50.08%
BISA - Bureau d'Ingénieurs SA scores 87.1 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%
BISA - Bureau d'Ingénieurs SA 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%
BISA - Bureau d'Ingénieurs SA scores 25.7 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 35.25.74%
  • Media authority: No data point — the criterion is taken out of the weighting and does not lower the score.—4%
Qualifications+0.00

BISA - Bureau d'Ingénieurs SA reaches a ranQ Trust Score of 4.2 out of 5.0 — rated «Very high». The rating draws, among other things, on 4.8 out of 5 stars from 12 customer reviews. The data basis is 96%, 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.

Reviews

Aggregated rating

Aggregated rating
4.8
of 5

Aggregated from 12 reviews across all connected sources

Sources
GGoogle4.812
★TrustpilotSoon
PProvenExpertSoon

Further sources are added continuously and factored into the ranQ Rating.

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Location

Avenue du Rothorn 10
3960 Sierre
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
08:00 - 12:00, 13:30 - 16:30
Sat
Closed
Sun
Closed

At a glance

Legal form
Corporation
UID
CHE-101.506.426
Founded
1969 · 57 years
Last commercial register change
January 28, 2025
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.
100.0
6%
  • 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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