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© 2026 cohaga AG · All Rights Reserved · St. Gallen, Switzerland · Imprint745,887 companies indexed · Last updated: today
DirectoryConstruction & ArchitectureConstruction & Project ManagementWinterthurBosshard Bau Beratung AG
Bosshard Bau Beratung AG Logo
Verified· 3 sourcesTrust Score
Summary

About the company

The core activity of Bosshard Bau Beratung AG is the planning, consulting and execution of construction projects, particularly in the following areas: Total renovation and refurbishment of residential and commercial buildings, Conversion and renovation of existing buildings, including energy-efficient renovation and historic preservation, New construction of residential and commercial buildings, including single-family and multi-family homes, Conducting architectural competitions and tenders, Owner consulting and representation, Construction management and supervision, Preparation of studies and project studies. The company thus offers comprehensive services throughout the entire construction project cycle.

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Products & services

Industry:Construction & Project Management
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3.8/5

Bosshard Bau Beratung AG

✓ Offered5
Construction consultancy
General and energy-related construction consultancy, preliminary concepts with cost estimates, property assessments, reuse concepts, and building permit review and consultancy for municipalities.
Planning of building projects
Preliminary and construction projects, cost estimates and budget estimates, building permit applications, and handling of the approval procedure for small to medium building projects.
Construction management and execution
Detailed design, tenders, scheduling, construction management, cost monitoring, invoicing and defects management for conversions, extensions, storey additions, renovations and new builds.
Client advisory and client representation
Support for building projects up to handover, client advisory and representation, including for public clients and study commissions.
Submissions, study commissions and competitions
Organisation of study commissions and competitions, and execution of submissions in public procurement, including TU and architectural procedures.
Trust & reputation

ranQ Trust Score of Bosshard Bau Beratung AG: 3.8 out of 5.0

Trust Score3.8/ 5.0

High

x

Data basis 96% · As of October 2026

Bosshard Bau Beratung AG scores 49.8 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.68.224%
  • 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.17.610%
  • 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.35.08%
Bosshard Bau Beratung AG 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.97.712%
  • 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%
Bosshard Bau Beratung AG scores 85.0 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).85.022%
Bosshard Bau Beratung AG scores 5.4 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 35.5.44%
  • Media authority: No data point — the criterion is taken out of the weighting and does not lower the score.—4%
Qualifications+0.00

Bosshard Bau Beratung AG reaches a ranQ Trust Score of 3.8 out of 5.0 — rated «High». The rating draws, among other things, on 5.0 out of 5 stars from 1 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 1 reviews across all connected sources

Sources
GGoogle51
★TrustpilotSoon
PProvenExpertSoon

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

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Location

Grüzefeldstrasse 51
8404 Winterthur
Opening hours
Mon
07:30 - 17:30
Tue
07:30 - 17:30
Wed
07:30 - 17:30
Thu
07:30 - 17:30
Fri
07:30 - 17:30
Sat
Closed
Sun
Closed

At a glance

Legal form
Corporation
UID
CHE-260.779.121
Founded
2012 · 14 years
Last commercial register change
August 13, 2021
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.70.03%
    • Full methodology

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