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© 2026 cohaga AG · All Rights Reserved · St. Gallen, Switzerland · Imprint745,887 companies indexed · Last updated: today
DirectoryConstruction & ArchitectureCivil Engineering FirmsWinterthurBONA FISCHER Bauingenieure AG
BONA FISCHER Bauingenieure AG Logo
Verified· 3 sourcesTrust Score
Summary

About the company

The core activity of Bona ∙ Fischer Bauingenieure AG is the design and structural planning in civil engineering.

AI-generated
Offering

Products & services

Industry:Civil Engineering Firms
✓ Offered5
Structural Engineering Design
Structural engineering design for solid construction and steel construction, conversions and infrastructure; design of residential, industrial and commercial buildings, bridges, excavation works and specialist retail centres.
Building Inspections and Expert Reports
Inspection of existing structures, earthquake strengthening, concrete analyses and repairs, as well as structural assessments and load capacity analyses.
Conversions and Renovations
Planning and supervision of conversions to historic buildings, increased payload capacity, and underpinning and propping.
Excavation Planning
Excavations with sheet pile and Rühl walls, soil nailing, piling and groundwater lowering for construction projects.
Structural Civil Protection Control
Control authority for structural civil protection in several municipalities, as an external control and inspection assignment in the public sector.
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4.1/5

BONA FISCHER Bauingenieure AG

Trust & reputation

ranQ Trust Score of BONA FISCHER Bauingenieure AG: 4.1 out of 5.0

Trust Score4.1/ 5.0

High

x

Data basis 96% · As of October 2026

BONA FISCHER Bauingenieure AG scores 62.0 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.70.824%
  • 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.27.910%
  • 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.78.08%
BONA FISCHER Bauingenieure AG scores 89.3 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.70.07%
BONA FISCHER Bauingenieure AG 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%
BONA FISCHER Bauingenieure AG scores 6.3 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 35.6.34%
  • Media authority: No data point — the criterion is taken out of the weighting and does not lower the score.—4%
Qualifications+0.00

BONA FISCHER Bauingenieure AG reaches a ranQ Trust Score of 4.1 out of 5.0 — rated «High». The rating draws, among other things, on 5.0 out of 5 stars from 2 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
5
of 5

Aggregated from 2 reviews across all connected sources

Sources
GGoogle52
★TrustpilotSoon
PProvenExpertSoon

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

Knowledge

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Location

Rütlistrasse 20
8400 Winterthur

At a glance

Legal form
Corporation
UID
CHE-105.945.753
Founded
1990 · 36 years
Last commercial register change
July 15, 2025
Employees
11 to 20
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.70.03%
    • Full methodology

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