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© 2026 cohaga AG · All Rights Reserved · St. Gallen, Switzerland · Imprint745,888 companies indexed · Last updated: today
DirectoryCrafts & TradesPlumbing & Building ServicesSchwarzenburgLempen Gebäudetechnik AG
Lempen Gebäudetechnik AG Logo
Verified· 3 sourcesTrust Score
Summary

About the company

Lempen Gebäudetechnik is a Swiss family-owned company specializing in the planning, consulting and execution of building technology projects, particularly in the areas of sanitation and heating.

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Products & services

Industry:Plumbing & Building Services
✓ Offered3
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3.8/5

Lempen Gebäudetechnik AG

Consulting and planning
Consulting and planning of building services solutions, from analysis to implementation; support with projects, selection of the energy source and the heating system.
Sanitary installations
Sanitary installations for new builds and renovations, bathroom conversions, water supply, wastewater technology, gas installations, water treatment as well as service and repair work.
Heating system installations
Heating system installations for new builds and renovations, heat pumps, gas and oil heating systems, pellet and log-wood heating systems, thermal solar systems as well as service, repairs and maintenance.
Trust & reputation

ranQ Trust Score of Lempen Gebäudetechnik AG: 3.8 out of 5.0

Trust Score3.8/ 5.0

High

x

Data basis 96% · As of October 2026

Lempen Gebäudetechnik AG scores 53.8 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.70.824%
  • 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.27.910%
  • 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.35.08%
Lempen Gebäudetechnik AG scores 79.8 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.86.512%
  • 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%
Lempen Gebäudetechnik AG scores 85.0 out of 100 points in the Identity area of the ranQ Trust Score. This area carries 22% of the weighting.
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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%
Lempen Gebäudetechnik AG scores 17.1 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 35.17.14%
  • Media authority: No data point — the criterion is taken out of the weighting and does not lower the score.—4%
Qualifications+0.00

Lempen Gebäudetechnik AG 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 2 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 2 reviews across all connected sources

Sources
GGoogle52
★TrustpilotSoon
PProvenExpertSoon

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

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Comparisons

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Location

Freiburgstrasse 26
3150 Schwarzenburg
Opening hours
Mon
07:15 - 12:00, 13:00 - 17:00
Tue
07:15 - 12:00, 13:00 - 17:00
Wed
07:15 - 12:00, 13:00 - 17:00
Thu
07:15 - 12:00, 13:00 - 17:00
Fri
07:15 - 12:00, 13:00 - 16:00
Sat
Closed
Sun
Closed

At a glance

Legal form
Corporation
UID
CHE-458.084.855
Founded
2016 · 10 years
Last commercial register change
April 21, 2016
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.
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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