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© 2026 cohaga AG · All Rights Reserved · St. Gallen, Switzerland · Imprint745,629 companies indexed · Last updated: today
DirectoryCrafts & TradesPlumbing & Building ServicesWohlen AgWidmer Haustechnik
Widmer Haustechnik Logo
Verified· 3 sourcesTrust Score
Summary

About the company

Widmer Haustechnik provides installation, renovation and maintenance services for heating and sanitary systems, including planning, installation and repair work. The company also implements renewable energy solutions such as heat pumps and solar installations.

AI-generated
Offering

Products & services

Industry:Plumbing & Building Services
✓ Offered7
New-build heating installations
Heating installation for new builds, from oil heating to heat pumps; woodchip boilers, gas heating, radiators and underfloor heating are also planned and implemented.
Heating system renovations
Renovation of heating systems, from minor, partial and complete renovations to replacement of old oil, gas, wood heating systems or heat pumps; including maintenance and repairs.
Renewable heating systems
Heat pumps, pellet heating systems as well as solar and photovoltaic installations; including variants with groundwater, geothermal or air heat pumps and combinations with solar systems.
New-build plumbing installations
Sanitary installations for new builds and conversions, including cold and hot water systems, wastewater systems, gas installations, as well as bathroom, WC and kitchen installations.
Sanitary plumbing renovations
Renovation of cold and hot water pipes, hot water supply, as well as bathrooms, WCs and kitchens; minor, partial and complete renovations for residential and commercial buildings.
Plumbing service and repairs
Service and repair for heating breakdowns, pipe bursts, continuously running cisterns or boiler blockages; as well as periodic maintenance, oil burner service and boiler inspections.
Boiler descaling
Descale and service boilers, including a function check; to reduce energy consumption and extend the boiler’s service life.
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4.2/5

Widmer Haustechnik

Trust & reputation

ranQ Trust Score of Widmer Haustechnik: 4.2 out of 5.0

Trust Score4.2/ 5.0

Very high

x

Data basis 96% · As of October 2026

Widmer Haustechnik scores 78.9 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.78.824%
  • 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.79.710%
  • 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.78.08%
Widmer Haustechnik scores 75.3 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.92.512%
  • 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%
Widmer Haustechnik 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%
Widmer Haustechnik 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

Widmer Haustechnik reaches a ranQ Trust Score of 4.2 out of 5.0 — rated «Very high». The rating draws, among other things, on 4.7 out of 5 stars from 22 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
4.7
of 5

Aggregated from 22 reviews across all connected sources

Sources
GGoogle4.722
★TrustpilotSoon
PProvenExpertSoon

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

Knowledge

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Comparisons

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Location

Höhenweg 35
5610 Wohlen Ag
Opening hours
Mon
07:00 - 12:00, 13:15 - 17:15
Tue
07:00 - 12:00, 13:15 - 17:15
Wed
07:00 - 12:00, 13:15 - 17:15
Thu
07:00 - 12:00, 13:15 - 17:15
Fri
07:00 - 12:00, 13:15 - 16:15
Sat
Closed
Sun
Closed

At a glance

Legal form
Sole proprietorship
UID
CHE-333.885.896
Founded
2014 · 12 years
Last commercial register change
March 8, 2024
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.
67.0
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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