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© 2026 cohaga AG · All Rights Reserved · St. Gallen, Switzerland · Imprint747,212 companies indexed · Last updated: today
DirectoryIndustryGeneral goods productionWünnewilL. Oppliger Söhne
L. Oppliger Söhne Logo
Verified· 3 sourcesTrust Score
Summary

About the company

L. Oppliger Söhne provides services in plumbing, water supply, heating, sheet-metal work, roofing, lightning protection, maintenance and advisory (Impulsberatung). The company plans and installs heating systems (including heat pumps, wood, gas and oil systems), solar/photovoltaic installations, and carries out bathroom renovations and end-to-end project management.

AI-generated
Offering

Products & services

Industry:General goods production
✓ Offered8
Sanitary installations
Planning and execution of sanitary installations for new builds, conversions and renovations; repairs, boiler descaling and water softening.
Heating systems
Planning and execution of heating systems for new builds, conversions and renovations; repairs, oil heating, wood heating, heat pumps, gas heating and solar heating.
Water supply
Water supply with pumps, pipes and reservoirs; water inlets and water samples to ensure water quality and availability.
Sheet metal work
Sheet metal work for roofs and facades on new builds, conversions and renovations; planning and execution of pitched and flat roofs as well as facade work.
Roofing
Roofing work for new builds, conversions and renovations; pitched roofs, flat roofs, repairs, refurbishments and roof maintenance to preserve value.
Lightning protection
Planning and installation of lightning protection systems for new builds and existing buildings; subsequent installations, additions, grounding systems and surge protection.
Service
Consulting, planning, coordination, execution, repairs and maintenance of buildings and technical installations.
Impulse consulting
Advice on renewable heating systems for homeowners and owners by floor; support for replacing fossil heating systems and with planning and financing.
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4.1/5

L. Oppliger Söhne

Trust & reputation

ranQ Trust Score of L. Oppliger Söhne: 4.1 out of 5.0

Trust Score4.1/ 5.0

High

x

Data basis 96% · As of November 2026

L. Oppliger Söhne scores 67.8 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.69.424%
  • 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.55.910%
  • 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.78.08%
L. Oppliger Söhne scores 84.8 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.70.07%
L. Oppliger Söhne scores 83.3 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).83.322%
L. Oppliger Söhne scores 48.6 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 35.48.64%
  • Media authority: No data point — the criterion is taken out of the weighting and does not lower the score.—4%
Qualifications+0.00

L. Oppliger Söhne reaches a ranQ Trust Score of 4.1 out of 5.0 — rated «High». The rating draws, among other things, on 4.5 out of 5 stars from 8 customer reviews. The data basis is 96%, 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.

Reviews

Aggregated rating

Aggregated rating
4.5
of 5

Aggregated from 8 reviews across all connected sources

Sources
GGoogle4.58
★TrustpilotSoon
PProvenExpertSoon

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

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Location

Hier entsteht die Karte
3184 Wünnewil
Opening hours
Mon
07:15 - 17:00
Tue
07:15 - 17:00
Wed
07:15 - 17:00
Thu
07:15 - 17:00
Fri
07:15 - 16:15
Sat
Closed
Sun
Closed

At a glance

Legal form
General Partnership
UID
CHE-113.723.539
Founded
1961 · 65 years
Last commercial register change
April 11, 1989
Employees
11 to 20
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.
79.0
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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