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© 2026 cohaga AG · All Rights Reserved · St. Gallen, Switzerland · Imprint745,887 companies indexed · Last updated: today
DirectoryCrafts & TradesPlumbing & Building ServicesMosnangHollenstein Gebäudetechnik AG
Hollenstein Gebäudetechnik AG Logo
Verified· 3 sourcesTrust Score
Summary

About the company

The core activity of Hollenstein AG encompasses the areas of Sanitation, Building Envelopes, and Solar Energy. Specifically, the company offers services in the following areas: Sanitation: planning, installation, and realization of bathrooms and wet cells, as well as the supply of water to the required locations. Building Envelopes: roofing, sheet metal work, and façade construction to give buildings character and protect them from wind and weather. Solar Energy: planning, installation, and realization of solar energy systems to generate heat and electricity. The company also offers propane gas and balloon gas and operates a gas depot.

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Offering

Products & services

Industry:Plumbing & Building Services
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Hollenstein Gebäudetechnik AG

Roofing
Sheet Metal Work
✓ Offered12
Plumbing planning and bathroom renovation
Sanitary planning, advice and implementation for new builds and renovations; bathroom renovations, laying sanitary installations, wet-room planning as well as service and repairs.
Hot water preparation and water technology
Hot water preparation with heat pump boilers, water softening systems and rainwater use; including installation and sizing of the systems for households and buildings.
Building envelopes, roof and façade
Planning, implementation and maintenance of building envelopes; façade, roof and service for new builds and renovations.
Pitched roof and flat roof
Roof coverings for pitched roofs with tiles, slate or panels as well as flat roofs with bituminous sealing, plastic or EPDM membranes and green roofs.
Sheet metal work
Sheet metal work including bending, soldering, riveting and welding; gutters, parapets, trims/flashings, special components and art objects.
Lightning protection
Planning and installation of lightning protection systems for new builds and existing buildings according to current guidelines.
Liquid plastic waterproofing
Waterproofing with liquid plastic for flat roofs, threshold-free transitions, complex details and surface waterproofing with or without a protective layer.
Window frames and façade elements
Aluminium window frames, door frames, window sills, shutters and profiles for technically correct transitions in façade designs.
Balcony and terrace flooring
Balcony and terrace floors with floor boards, renovations and balcony extensions.
Solar energy and photovoltaics
Solar energy with flat collectors, tube collectors and photovoltaics; needs assessment, planning, installation and service of the systems.
Solar thermal energy
Solar collectors for domestic hot water and heat generation with flat collectors and tube collectors; needs assessment, planning, installation and service.
Gas depot and propane gas delivery
Supply of propane gas for private customers, butcheries, restaurants and construction companies; bottled gas on request as well as cylinders.
Trust & reputation

ranQ Trust Score of Hollenstein Gebäudetechnik AG: 4.0 out of 5.0

Trust Score4.0/ 5.0

High

x

Data basis 96% · As of October 2026

Hollenstein Gebäudetechnik AG scores 64.2 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.76.724%
  • 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.45.610%
  • 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.50.08%
Hollenstein Gebäudetechnik 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%
Hollenstein Gebäudetechnik 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%
Hollenstein Gebäudetechnik AG scores 7.1 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 35.7.14%
  • Media authority: No data point — the criterion is taken out of the weighting and does not lower the score.—4%
Qualifications+0.00

Hollenstein Gebäudetechnik AG reaches a ranQ Trust Score of 4.0 out of 5.0 — rated «High». The rating draws, among other things, on 5.0 out of 5 stars from 5 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 5 reviews across all connected sources

Sources
GGoogle55
★TrustpilotSoon
PProvenExpertSoon

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

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Location

Lindenplatz 3
9607 Mosnang
Opening hours
Mon
07:00 - 12:00, 13:00 - 17:00
Tue
07:00 - 12:00, 13:00 - 17:00
Wed
07:00 - 12:00, 13:00 - 17:00
Thu
07:00 - 12:00, 13:00 - 17:00
Fri
07:00 - 12:00, 13:00 - 17:00
Sat
Closed
Sun
Closed

At a glance

Legal form
Corporation
UID
CHE-316.876.548
Founded
2012 · 14 years
Last commercial register change
November 8, 2024
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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