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© 2026 cohaga AG · All Rights Reserved · St. Gallen, Switzerland · Imprint747,212 companies indexed · Last updated: today
DirectoryCrafts & TradesHeating installerPrattelnZimma GmbH
Zimma GmbH Logo
Verified· 2 sourcesTrust Score
Summary

About the company

Zimma GmbH is a heating and plumbing business. Its services include bathroom and heating renovations, new-build installations and maintenance, as well as heat pumps, solar systems, ventilation and custom-designed washbasin countertops.

AI-generated
Presence

Service area

Offering

Products & services

Industry:Heating installerPlumber
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Zimma GmbH

✓ Offered4
Plumbing Services
Complete bathroom conversions, core renovations, new-build installations and plumbing service work.
Heating Services
Complete heating conversions, heat pumps, solar systems and heating service work.
Ventilation Services
Ventilation work as part of the additional services listed on the website.
General Contracting
General contracting as an additional service alongside plumbing, heating and ventilation work.
Trust & reputation

ranQ Trust Score of Zimma GmbH: 4.1 out of 5.0

Trust Score4.1/ 5.0

High

x

Data basis 54% · As of November 2026

Without public customer reviews the score stays capped.

Zimma GmbH has no value in the Reputation area of the ranQ Trust Score because no data is available. The area carries 42% of the weighting and drops out of the calculation for this profile; it does not lower the score, only the reported data basis.
x
CriterionValueWeight
  • Review quality: No data point — the criterion is taken out of the weighting and does not lower the score.—24%
  • Review volume: No data point — the criterion is taken out of the weighting and does not lower the score.—10%
  • Review recency: No data point — the criterion is taken out of the weighting and does not lower the score.—8%
Zimma GmbH scores 83.0 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.55.07%
Zimma 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%
Zimma GmbH scores 0.3 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 35.0.34%
  • Media authority: No data point — the criterion is taken out of the weighting and does not lower the score.—4%
Qualifications+0.00

Zimma GmbH reaches a ranQ Trust Score of 4.1 out of 5.0 — rated «High». No public customer reviews are available for this provider; the rating is based on the remaining criteria. The data basis is 54%, 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.

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Location

Ergolzstrasse 10
4133 Pratteln

At a glance

Legal form
Limited Liability Company
UID
CHE-112.005.186
Founded
2004 · 22 years
Last commercial register change
May 1, 2017
Employees
1 to 10

Active in 1 of 26 cantons · 1 municipality

  • BLPratteln
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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