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© 2026 cohaga AG · All Rights Reserved · St. Gallen, Switzerland · Imprint746,904 companies indexed · Last updated: today
DirectoryConstruction & ArchitectureBuilding contractorStadel (Winterthur)Partnerbau AG
Partnerbau AG Logo
Verified· 2 sourcesTrust Score
Summary

About the company

Partnerbau AG is a construction company that performs building construction, civil engineering, conversions and renovations. Its services include masonry, building and bathroom renovations, pipe laying and deconstruction, and it supports projects from planning through to completion.

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Service area

Offering

Products & services

Industry:Building contractor
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4.1/5

Partnerbau AG

Civil works
Renovation
Excavation
Mason
✓ Offered3
Building construction
Building construction for residential, commercial and industrial projects as well as public-sector projects; planning, implementation, consulting and supervision throughout the entire construction process.
Conversion and renovations
Conversions and renovations with masonry work, renovation of older buildings, bathroom renovations, conversions and extensions, façade and wall repairs, as well as work on historic plastering and in monument preservation.
Civil engineering
Civil engineering works including construction of shaft structures, laying pipelines and dismantling works; individual consulting and implementation even for complex projects.
Trust & reputation

ranQ Trust Score of Partnerbau AG: 4.1 out of 5.0

Trust Score4.1/ 5.0

High

x

Data basis 54% · As of November 2026

Without public customer reviews the score stays capped.

Partnerbau AG 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.
x
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%
Partnerbau AG scores 74.1 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.64.612%
  • 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%
Partnerbau 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%
Partnerbau AG scores 40.0 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 35.40.04%
  • Media authority: No data point — the criterion is taken out of the weighting and does not lower the score.—4%
Qualifications+0.00

Partnerbau AG 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 November 2026.

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

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Location

Unterdorfstrasse 24
8404 Stadel (Winterthur)

At a glance

Legal form
Corporation
UID
CHE-438.387.212
Founded
2021 · 5 years
Last commercial register change
October 14, 2026
Employees
11 to 20

Active in 1 of 26 cantons

  • ZHZurich
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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