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© 2026 cohaga AG · All Rights Reserved · St. Gallen, Switzerland · Imprint745,701 companies indexed · Last updated: today
DirectoryCrafts & TradesPlumbing & Building ServicesSchmitten FrLehmann AG
Lehmann AG Logo
Verified· 2 sourcesTrust Score
Summary

About the company

Lehmann AG provides services in sanitary installations, water supply systems, sheet metal work, roofing, facade cladding and lightning protection systems. The company plans and carries out work for new builds, conversions and renovations.

AI-generated
Offering

Products & services

Industry:Plumbing & Building Services
✓ Offered6
Roof coverings
Turnkey solutions for pitched and flat roofs, tiled roofs, metal roofs and slate roofs; roof windows, pitched-roof insulation systems, roof repairs, conversions, new builds and renovations.
Sheet-metal work
General sheet-metal work on the roof including gutters, downpipes, chimney flashings, dormer cladding, sheet-metal roofs, custom-made fabrications, as well as work on new builds, conversions and renovations.
Lightning protection systems
Design and installation of lightning protection systems according to cantonal regulations.
Façades
Ventilated façades for houses, office buildings or workshops in Eternit, metal, wood and sheet metal; carried out with façade construction and sheet-metal work.
Sanitary installations
Sanitary installations for new builds, renovations and conversions; bathroom refurbishments, repairs, hot-water heating, water softening systems, pressure boosting systems and fire-fighting equipment.
Water supply
Development and provision of drinking and service water; supply lines, hydrants, drinking-water supply, drinking-water treatment, house connections, water meters and pumping stations.
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4.1/5

Lehmann AG

Trust & reputation

ranQ Trust Score of Lehmann AG: 4.1 out of 5.0

Trust Score4.1/ 5.0

High

x

Data basis 54% · As of October 2026

Without public customer reviews the score stays capped.

Lehmann AG 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%
Lehmann 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%
Lehmann AG scores 83.3 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).83.322%
Lehmann AG scores 12.9 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 35.12.94%
  • Media authority: No data point — the criterion is taken out of the weighting and does not lower the score.—4%
Qualifications+0.00

Lehmann AG 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 October 2026.

The Trust Score cannot be bought and is calculated from publicly verifiable data.

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Location

Bagerstrasse 26
3185 Schmitten Fr

At a glance

Legal form
Corporation
UID
CHE-107.763.298
Founded
2016 · 10 years
Last commercial register change
April 1, 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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