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© 2026 cohaga AG · All Rights Reserved · St. Gallen, Switzerland · Imprint745,937 companies indexed · Last updated: today
DirectoryConstruction & ArchitectureSpecialized Construction ActivitiesDettighofenAmmann und Gasser Inh. Heinz Gasser
Ammann und Gasser Inh. Heinz Gasser Logo
Verified· 3 sourcesTrust Score
Summary

About the company

The core activity of Ammann-Gasser encompasses the provision of services and works in the field of construction and building technology, particularly in the following three areas of expertise: 1. Roofing and sheet metal work: The company offers sheet metal work services focusing on the processing and treatment of metal for the construction of roofs, facades, and other building components. 2. Roofing: Ammann-Gasser provides services in the field of roofing and roof maintenance, including the installation and repair of roofing systems. 3. Building technology: The company provides services in the field of sanitary installations, including the planning, installation, and maintenance of heating, ventilation, and plumbing systems.

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Products & services

Industry:Specialized Construction Activities
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3.8/5

Ammann und Gasser Inh. Heinz Gasser

4
Roofing
Pitched roofs, flat roofing systems, roof greening, roof windows, lightning protection, as well as maintenance work on roofs and gutters, including replacement of defective tiles.
Building sheet metal work
Sheet metal work on roofs and buildings, carried out with many years of experience and personal customer advice.
Sanitary installations
All sanitary work for new builds and renovations, in particular bathroom renovations, as well as descaling and replacing boilers.
General contractor services for conversions and extensions
Conversions and extensions as general contractor, handled cost-effectively without architects.
Trust & reputation

ranQ Trust Score of Ammann und Gasser Inh. Heinz Gasser: 3.8 out of 5.0

Trust Score3.8/ 5.0

High

x

Data basis 96% · As of October 2026

Ammann und Gasser Inh. Heinz Gasser scores 49.8 out of 100 points in the Reputation area of the ranQ Trust Score. This area carries 42% of the weighting.
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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%
Ammann und Gasser Inh. Heinz Gasser scores 78.5 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%
Ammann und Gasser Inh. Heinz Gasser 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%
Ammann und Gasser Inh. Heinz Gasser scores 0.9 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 35.0.94%
  • Media authority: No data point — the criterion is taken out of the weighting and does not lower the score.—4%
Qualifications+0.00

Ammann und Gasser Inh. Heinz Gasser 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

Dorfstrasse 6
8505 Dettighofen

At a glance

Legal form
Sole proprietorship
UID
CHE-105.870.569
Founded
1979 · 47 years
Last commercial register change
February 18, 2022
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.67.06%
  • 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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