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© 2026 cohaga AG · All Rights Reserved · St. Gallen, Switzerland · Imprint746,904 companies indexed · Last updated: today
DirectoryCrafts & TradesPlumberSt. GallenJohn Sanitär AG
John Sanitär AG Logo
Verified· 3 sourcesTrust Score
Summary

About the company

John Sanitär AG carries out plumbing and heating work, including new installations, alterations, renovations, maintenance and repairs. Its services also cover property drainage, sewer inspections and pipe cleaning.

AI-generated
Presence

Service area

Offering

Products & services

Industry:PlumberRoofer
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4.4/5

John Sanitär AG

Building installation
✓ Offered3
Plumbing work
Plumbing work for new builds and conversions, renovations of sanitary installations, service work, boiler replacement and maintenance, plus gas and compressed-air related work.
Heating work
Heating work including adjustments to heating systems, service and inspection, underfloor heating flushing, and maintenance of heating components such as pumps and valves.
Property drainage
Property drainage with sewer inspections and documentation, flushing work for drainage systems, and unclogging of drains in and around the house.
Trust & reputation

ranQ Trust Score of John Sanitär AG: 4.4 out of 5.0

Trust Score4.4/ 5.0

Very high

x

Data basis 96% · As of November 2026

John Sanitär AG scores 88.6 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.87.324%
  • 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.86.510%
  • 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%
John Sanitär AG scores 81.1 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.89.612%
  • 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%
John Sanitär AG scores 86.7 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).86.722%
John Sanitär AG scores 10.0 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 35.10.04%
  • Media authority: No data point — the criterion is taken out of the weighting and does not lower the score.—4%
Qualifications+0.00

John Sanitär AG reaches a ranQ Trust Score of 4.4 out of 5.0 — rated «Very high». The rating draws, among other things, on 4.9 out of 5 stars from 29 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
4.9
of 5

Aggregated from 29 reviews across all connected sources

Sources
GGoogle4.929
★TrustpilotSoon
PProvenExpertSoon

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

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Comparisons

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Location

Scheidwegstrasse 20
9000 St. Gallen
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 - 14:30
Sat
Closed
Sun
Closed

At a glance

Legal form
Corporation
UID
CHE-469.954.555
Founded
2015 · 11 years
Last commercial register change
January 30, 2019
Employees
1 to 10

Active in 1 of 26 cantons · 1 municipality

  • SGSt. Gallen
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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