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© 2026 cohaga AG · All Rights Reserved · St. Gallen, Switzerland · Imprint745,937 companies indexed · Last updated: today
DirectoryCrafts & TradesPlumbing & Building ServicesSchaffhausenSI Sanitär GmbH
SI Sanitär GmbH Logo
Verified· 3 sourcesTrust Score
Summary

About the company

The core activity of Si Sanitär GmbH is the planning, execution and maintenance of sanitary installations, as well as the performance of service work in the sanitary sector, including: Consulting, planning and execution of new and renovation projects, Service and repairs of sanitary installations, Boiler descaling, Bathroom and kitchen renovation, Replacement of defective water heaters (boilers), Drainage and cleaning, Repairs of all fittings, Delivery and installation of washing and drying machines, dishwashers, water softening and pressure boosting systems, as well as all accessories related to water, Specialized assistance in case of water damage. The company offers a comprehensive service in the sanitary sector and is focused on the needs of its customers.

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Products & services

Industry:Plumbing & Building Services
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3.8/5

SI Sanitär GmbH

✓ Offered8
Plumbing works
Plumbing works for new builds, conversions and comprehensive plumbing projects; installations for bathroom, kitchen and WC.
Bathroom renovation
Renovation and modernisation of bathrooms; planning and execution of bathroom projects.
Pipe cleaning
Pipe cleaning to remove blockages and ensure smooth wastewater drainage.
Heating installation
Installation of heating systems for warmth and comfort; installation of efficient heating solutions.
Water treatment
Water treatment systems for clean tap water; solutions for drinking-water quality in the home.
Emergency service
24/7 emergency plumbing service for acute plumbing problems; rapid help for urgent faults and damage.
Plumbing consultation
On-site personal consultation, analysis of existing systems, planning of installations as well as recommendations for energy-efficient and water-saving solutions.
Consultation for water damage and leaks
Professional assessment for water damage and leaks, root-cause analysis, solution proposals and support with insurance matters.
Trust & reputation

ranQ Trust Score of SI Sanitär GmbH: 3.8 out of 5.0

Trust Score3.8/ 5.0

High

x

Data basis 96% · As of October 2026

SI Sanitär GmbH scores 59.7 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.73.124%
  • 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.35.310%
  • 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%
SI Sanitär GmbH scores 72.3 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.75.012%
  • 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%
SI Sanitär GmbH 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%
SI Sanitär GmbH scores 0.0 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 35.0.04%
  • Media authority: No data point — the criterion is taken out of the weighting and does not lower the score.—4%
Qualifications+0.00

SI Sanitär GmbH 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 3 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 3 reviews across all connected sources

Sources
GGoogle53
★TrustpilotSoon
PProvenExpertSoon

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

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Location

Talstrasse 40
8200 Schaffhausen
Opening hours
Mon
07:30 - 12:00, 13:00 - 17:00
Tue
07:30 - 12:00, 13:00 - 17:00
Wed
07:30 - 12:00, 13:00 - 17:00
Thu
07:30 - 12:00, 13:00 - 17:00
Fri
07:30 - 12:00, 13:00 - 16:00
Sat
Closed
Sun
Closed

At a glance

Legal form
Limited Liability Company
UID
CHE-187.819.480
Founded
2019 · 7 years
Last commercial register change
January 20, 2021
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.
88.0
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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