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© 2026 cohaga AG · All Rights Reserved · St. Gallen, Switzerland · Imprint745,937 companies indexed · Last updated: today
DirectoryCrafts & TradesPlumbing & Building ServicesOensingenLiechti Haustechnik AG
Liechti Haustechnik AG Logo
Verified· 3 sourcesTrust Score
Summary

About the company

The company's core activity is the planning and execution of sanitary installations, heating, ventilation and air conditioning systems in residential construction, industry and commerce. Additionally, the company offers service and repair services for heating systems, consulting and planning of bathroom renovations, service for sanitary installations, drain cleaning and pipe service, as well as training positions for sanitary and heating installers.

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Offering

Products & services

Industry:Plumbing & Building Services
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Liechti Haustechnik AG

✓ Offered12
Sanitary installations
Sanitary installations for new and older buildings, potable water and waste-water lines, rainwater use, water treatment, sanitary appliances, bathroom accessories and soundproofing installations.
Bathroom planning
Bathroom planning, advice and coordination for conversions and new planning, including the design of utility and washing rooms as well as installation of sanitary appliances and bathroom accessories.
Sanitary service
Sanitary service for maintenance and repairs, including descaling of boilers, filter changes, remedying water damage and support for existing systems.
Drain cleaning
Drain cleaning to remove blockages and maintain wastewater and waste-disposal systems.
Heating systems
Advisory, design and installation of heating systems with heat pumps, wood heating, pellet heating, TABS, condensing, oil and gas heating systems, as well as solar installations and domestic hot-water units.
Heating systems with renewable energy
Heat pump heating systems, heating with wood, pellet heating systems and solar installations for replacing fossil heating systems and operating with renewable energy.
Impulse consulting «erneuerbar heizen»
On-site consulting for replacing the heating system, selecting a suitable renewable heating system and support with subsidies.
Heating maintenance contract
Maintenance contracts for heating systems with regular visual inspection, cleaning, repairs and replacement of wearing parts.
Maintenance of heating systems
Maintenance and service for heating systems, including Sanol and Elysator, as well as documentation of the work carried out.
Heat pump water heater
Heat pump water heaters for efficient domestic hot-water production in buildings.
Utility line construction for gas and water
Connection of buildings with gas and water pipes, welding and laying pressure-loaded, buried PE pipelines.
Household appliances and bathroom furniture
Household appliances from the showroom, in particular washing machines, tumble dryers and dishwashers, as well as bathroom furniture and combinations.
Trust & reputation

ranQ Trust Score of Liechti Haustechnik AG: 4.4 out of 5.0

Trust Score4.4/ 5.0

Very high

x

Data basis 96% · As of October 2026

Liechti Haustechnik AG scores 81.0 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.73.024%
  • 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.94.410%
  • 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%
Liechti Haustechnik AG scores 90.9 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.70.07%
Liechti Haustechnik 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%
Liechti Haustechnik AG scores 37.1 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 35.37.14%
  • Media authority: No data point — the criterion is taken out of the weighting and does not lower the score.—4%
Qualifications+0.00

Liechti Haustechnik AG reaches a ranQ Trust Score of 4.4 out of 5.0 — rated «Very high». The rating draws, among other things, on 4.5 out of 5 stars from 40 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
4.5
of 5

Aggregated from 40 reviews across all connected sources

Sources
GGoogle4.540
★TrustpilotSoon
PProvenExpertSoon

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

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Location

Hauptstrasse 73
4702 Oensingen
Opening hours
Mon
07:30 - 11:45, 13:30 - 17:00
Tue
07:30 - 11:45, 13:30 - 17:00
Wed
07:30 - 11:45, 13:30 - 17:00
Thu
07:30 - 11:45, 13:30 - 17:00
Fri
07:30 - 11:45, 13:30 - 16:00
Sat
Closed
Sun
Closed

At a glance

Legal form
Corporation
UID
CHE-106.917.251
Founded
1988 · 38 years
Last commercial register change
September 14, 2026
Employees
11 to 20
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.85.03%
    • Full methodology

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