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© 2026 cohaga AG · All Rights Reserved · St. Gallen, Switzerland · Imprint745,544 companies indexed · Last updated: today
DirectoryCrafts & TradesPlumbing & Building ServicesPlan-Les-OuatesGeorges Constantin SA
Georges Constantin SA Logo
Verified· 3 sourcesTrust Score
Summary

About the company

Georges Constantin SA provides construction, renovation and maintenance of sanitary installations, artisanal sheet metal work and roof covering. The company also offers emergency repair services and an in-house study office for project design and execution.

AI-generated
Offering

Products & services

Industry:Plumbing & Building Services
✓ Offered5
Sanitary installations
Construction, renovation and maintenance of sanitary installations and gas systems; supply and drainage pipes, fluid supply, water treatment, disposal of wastewater.
Sheet metal roofing work
Handcrafted manufacture of roof sheet metal work; gutters, rainwater downpipes, roofing trims, metal cladding, roof windows, dormers, ornamental pieces.
Roofing
Construction and renovation of all types of roofing; flat or pitched roofs, with tiles, terracotta or slate, for projects of different sizes.
Sanitary emergency service
Urgent interventions and annual maintenance of sanitary installations; leak, blocked pipe, punctured hot water boiler, repair, replacement and tailored rapid solutions.
Design office for sanitary and roofing projects
Design of sanitary installation, roofing and sheet metal work projects; quotations, cost and schedule estimates, submission, computer plans, site supervision and expert assessment.
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4.4/5

Georges Constantin SA

Trust & reputation

ranQ Trust Score of Georges Constantin SA: 4.4 out of 5.0

Trust Score4.4/ 5.0

Very high

x

Data basis 96% · As of October 2026

Georges Constantin SA scores 80.3 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.78.524%
  • 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.78.610%
  • 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.88.08%
Georges Constantin SA scores 92.0 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%
Georges Constantin SA 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%
Georges Constantin SA scores 34.3 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 35.34.34%
  • Media authority: No data point — the criterion is taken out of the weighting and does not lower the score.—4%
Qualifications+0.00

Georges Constantin SA reaches a ranQ Trust Score of 4.4 out of 5.0 — rated «Very high». The rating draws, among other things, on 4.7 out of 5 stars from 21 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
4.7
of 5

Aggregated from 21 reviews across all connected sources

Sources
GGoogle4.721
★TrustpilotSoon
PProvenExpertSoon

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

Knowledge

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Comparisons

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Location

Chemin du Champ-des-Filles 11
1228 Plan-Les-Ouates

At a glance

Legal form
Corporation
UID
CHE-102.975.456
Founded
1949 · 77 years
Last commercial register change
April 8, 2026
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.
100.0
6%
  • Branch offices: Branch offices linked in the commercial register. Having none is normal and costs no points.95.03%
    • Full methodology

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