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© 2026 cohaga AG · All Rights Reserved · St. Gallen, Switzerland · Imprint745,765 companies indexed · Last updated: today
DirectoryReal EstateProperty ManagementWolhusenKaufmann Haus AG
Kaufmann Haus AG Logo
Verified· 3 sourcesTrust Score
Summary

About the company

Kaufmann Haus AG provides electrical installation services and maintenance for residential and commercial systems. It also plans and installs building-technology solutions, telephony/internet/network systems, photovoltaic systems and e‑mobility charging installations, offering energy consulting, planning and ongoing servicing.

AI-generated
Offering

Products & services

Industry:Property Management
✓ Offered6
Electrical installations
Electrical installations for new builds, conversions and renovations, from cost estimation and planning to execution.
Photovoltaic systems
Photovoltaic systems including planning, registration, installation, energy consulting, self-consumption optimisation, maintenance, servicing, cleaning and retrofittable electrical storage.
Service and maintenance
Service and maintenance of electrical installations, including adjustments after periodic inspections to improve safety and functionality.
Telephone / Internet / Network
Telephony, internet and network technology for private individuals and business customers, from fibre-optic and copper installations to tailor-made solutions.
Building technology
Building technology with intelligent systems for access control, lighting control, blind/shutter control and energy-related building solutions.
E-mobility
E-mobility with planning, selection, implementation and management of charging stations for electric vehicles, including optimised charging solutions with photovoltaic power.
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4.2/5

Kaufmann Haus AG

Trust & reputation

ranQ Trust Score of Kaufmann Haus AG: 4.2 out of 5.0

Trust Score4.2/ 5.0

Very high

x

Data basis 96% · As of October 2026

Kaufmann Haus AG scores 73.3 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.70.224%
  • 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.63.210%
  • 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.95.08%
Kaufmann Haus AG scores 85.5 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%
Kaufmann Haus 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%
Kaufmann Haus AG 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

Kaufmann Haus AG reaches a ranQ Trust Score of 4.2 out of 5.0 — rated «Very high». The rating draws, among other things, on 4.5 out of 5 stars from 11 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
4.5
of 5

Aggregated from 11 reviews across all connected sources

Sources
GGoogle4.511
★TrustpilotSoon
PProvenExpertSoon

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

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Comparisons

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Location

Bergboden 7
6110 Wolhusen
Opening hours
Mon
07:00 - 17:00
Tue
07:00 - 17:00
Wed
07:00 - 17:00
Thu
07:00 - 17:00
Fri
07:00 - 17:00
Sat
Closed
Sun
Closed

At a glance

Legal form
Corporation
UID
CHE-107.279.329
Founded
1988 · 38 years
Last commercial register change
June 11, 2019
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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