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

About the company

Gebr. Knabenhans AG is a family-run trades company offering roofing, sheet-metal, chimney sweeping, plumbing and heating services. The company carries out repairs, new installations, maintenance and inspections for residential and commercial buildings.

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Presence

Service area

Offering

Products & services

Industry:RooferSheet metal worker
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4.6/5

Gebr. Knabenhans AG

✓ Offered6
Roofing works
Construct, maintain and repair pitched roofs and flat roofs; roof inspections, roof renovations, thermal insulation, roof windows, solar systems, green roofs and facade works.
Sheet metal roofing works
Building sheet metal work with sheet metal work made of copper or aluminium; gutters, downpipes, roof flashings, facade cladding, lightning protection systems, as well as repair and maintenance.
Chimney sweeping
Cleaning and inspection of heating systems, chimneys, flue ducts and boilers; maintenance, replacement of seals and ventilation cleaning for residential and commercial buildings.
Plumbing works
Sanitary installations, repairs and maintenance; bathroom refurbishments, alterations, boiler service, filter maintenance, descaling and rectification of tap, WC and drain problems.
Heating works
Installation, maintenance and repair of heating systems; service for boilers, heat pumps, radiators, underfloor heating, expansion vessels and heating water systems.
Drain and sewer cleaning
Pipe and sewer cleaning, clearing blockages, high-pressure flushing and camera inspection for households, properties, commercial businesses and administrations in the Zurich area.
Trust & reputation

ranQ Trust Score of Gebr. Knabenhans AG: 4.6 out of 5.0

Trust Score4.6/ 5.0

Excellent

x

Data basis 96% · As of November 2026

Gebr. Knabenhans AG scores 93.7 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.93.024%
  • 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.100.010%
  • 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.88.08%
Gebr. Knabenhans AG scores 85.5 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%
Gebr. Knabenhans 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%
Gebr. Knabenhans AG scores 65.7 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 35.65.74%
  • Media authority: No data point — the criterion is taken out of the weighting and does not lower the score.—4%
Qualifications+0.00

Gebr. Knabenhans AG reaches a ranQ Trust Score of 4.6 out of 5.0 — rated «Excellent». The rating draws, among other things, on 4.9 out of 5 stars from 140 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 140 reviews across all connected sources

Sources
GGoogle4.9140
★TrustpilotSoon
PProvenExpertSoon

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

Knowledge

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Comparisons

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Location

Hardstrasse 69
8004 Zurich
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 - 17:00
Sat
Closed
Sun
Closed

At a glance

Legal form
Corporation
UID
CHE-102.597.466
Founded
1993 · 33 years
Last commercial register change
March 16, 2026
Employees
1 to 10

Active in 1 of 26 cantons · 1 municipality

  • ZHZurich
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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