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© 2026 cohaga AG · All Rights Reserved · St. Gallen, Switzerland · Imprint745,765 companies indexed · Last updated: today
DirectoryCrafts & TradesPlumbing & Building ServicesZurichKarl Waechter AG
Karl Waechter AG Logo
Verified· 3 sourcesTrust Score
Summary

About the company

The core activity of Karl Waechter AG is the planning, installation, maintenance and consulting of sanitary, heating and cooling systems as well as sheet metal and solar solutions for private individuals, companies and the public sector in the Zurich region.

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Offering

Products & services

Industry:Plumbing & Building ServicesSpecialized Construction Installations
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4.3/5

Karl Waechter AG

✓ Offered8
Sanitary installations for kitchen and bathroom
New builds, conversions and renovations of washrooms, wet rooms and kitchens, bathroom planning and redesign, water treatment, maintenance and repairs for domestic sanitary installations.
Heating systems and thermal solutions
Planning, construction and evaluation of heating systems such as air/water, brine/water and domestic hot-water heat pumps, gas, wood, oil and district-heating systems, as well as service packages.
Ventilation systems
Comfort and hygienic ventilation with heat recovery, fresh outdoor air, moisture extraction and pollen filters for a pleasant indoor climate in homes and workplaces.
Air conditioning systems
Advisory, planning, installation and maintenance of air conditioning systems and units for residential, office, storage, server and production areas, including 24-hour service.
Solar systems and photovoltaics
Advisory, planning, installation, commissioning, maintenance and remote monitoring of photovoltaic systems, as well as storage and self-consumption solutions.
Sheet metal work (roofing & cladding)
Sheet metal work for building envelopes, classic sheet metal services, roof drainage and lightning protection for flat and pitched roofs, façades, roofs and chimneys.
Advisory and planning for energy and building technology
End-to-end solutions for efficient buildings, project planning and delivery of new-build and renovation projects, coordination of specialist partners, as well as operation and maintenance.
Service work and on-call duty
Heating and sanitary service, maintenance work, descaling of boilers, filter replacement, repairs, heating check-ups and 24-hour on-call duty for faults.
Trust & reputation

ranQ Trust Score of Karl Waechter AG: 4.3 out of 5.0

Trust Score4.3/ 5.0

Very high

x

Data basis 96% · As of October 2026

Karl Waechter AG scores 74.2 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.68.124%
  • 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.72.110%
  • 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.95.08%
Karl Waechter AG scores 92.3 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.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.82.07%
Karl Waechter 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%
Karl Waechter AG scores 57.1 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 35.57.14%
  • Media authority: No data point — the criterion is taken out of the weighting and does not lower the score.—4%
Qualifications+0.00

Karl Waechter AG reaches a ranQ Trust Score of 4.3 out of 5.0 — rated «Very high». The rating draws, among other things, on 4.4 out of 5 stars from 16 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
4.4
of 5

Aggregated from 16 reviews across all connected sources

Sources
GGoogle4.416
★TrustpilotSoon
PProvenExpertSoon

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

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Comparisons

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Location

Eidmattstrasse 14
8032 Zurich
Opening hours
Mon
07:00 - 12:00, 13:00 - 16:30
Tue
07:00 - 12:00, 13:00 - 16:30
Wed
07:00 - 12:00, 13:00 - 16:30
Thu
07:00 - 12:00, 13:00 - 16:30
Fri
07:00 - 12:00, 13:00 - 16:30
Sat
Closed
Sun
Closed

At a glance

Legal form
Corporation
UID
CHE-208.980.539
Founded
2011 · 15 years
Last commercial register change
March 2, 2026
Employees
21 to 50
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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