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

About the company

The core activity of Wirz Haustechnik is the provision of services in the field of sanitary and building technology, particularly in the areas of: Sanitary work, Heating work, Water softening systems, and Service and maintenance work. The company offers consulting, planning and execution of work in these areas and focuses on the maintenance and upkeep of sanitary and heating systems to prevent unexpected failures and ensure the efficiency of the systems.

AI-generated
Offering

Products & services

Industry:Plumbing & Building Services
✓ Offered4
Plumbing work
Sanitary installations, kitchen and bathroom conversions, repairs of pipes and fittings, replacement of sanitary facilities, drain unblocking, boiler cleaning, water filter service and remediation of water damage.
Heating work
Installation, purchase and replacement of heating systems, maintenance and repair, venting and refilling, troubleshooting, heating controls, and advice on gas, oil, district heating and heat pump systems.
Limescale removal systems
Consulting, selection, installation and maintenance of limescale removal systems against hard water; including salt-based, salt-free and electronic systems as well as water hardness analysis.
Service and maintenance work
Regular maintenance, inspection, repair and emergency service for heating, sanitary and limescale removal systems, with individual maintenance schedules and preventive maintenance.
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3.9/5

L. Wirz Haustechnik Sanitär und Heizung

Trust & reputation

ranQ Trust Score of L. Wirz Haustechnik Sanitär und Heizung: 3.9 out of 5.0

Trust Score3.9/ 5.0

High

x

Data basis 96% · As of October 2026

L. Wirz Haustechnik Sanitär und Heizung scores 71.3 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.78.124%
  • 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.49.510%
  • 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%
L. Wirz Haustechnik Sanitär und Heizung scores 57.0 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.50.012%
  • 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%
L. Wirz Haustechnik Sanitär und Heizung 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%
L. Wirz Haustechnik Sanitär und Heizung scores 1.7 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 35.1.74%
  • Media authority: No data point — the criterion is taken out of the weighting and does not lower the score.—4%
Qualifications+0.00

L. Wirz Haustechnik Sanitär und Heizung reaches a ranQ Trust Score of 3.9 out of 5.0 — rated «High». The rating draws, among other things, on 5.0 out of 5 stars from 6 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
5
of 5

Aggregated from 6 reviews across all connected sources

Sources
GGoogle56
★TrustpilotSoon
PProvenExpertSoon

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

Knowledge

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Location

Hagmattstrasse 7a
4123 Allschwil
Opening hours
Mon
07:00 - 17:00
Tue
07:00 - 17:00
Wed
07:00 - 17:00
Thu
07:00 - 17:00
Fri
07:00 - 17:00
Sat
07:00 - 17:00
Sun
Closed

At a glance

Legal form
Sole proprietorship
UID
CHE-360.353.567
Founded
2023 · 3 years
Last commercial register change
August 10, 2023
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.67.06%
  • 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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