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© 2026 cohaga AG · All Rights Reserved · St. Gallen, Switzerland · Imprint745,887 companies indexed · Last updated: today
DirectoryCrafts & TradesPlumbing & Building ServicesZurichHaustechnik Service Zürich AG
Haustechnik Service Zürich AG Logo
Verified· 3 sourcesTrust Score
Summary

About the company

The company Haustechnik Services Zürich (HSZ) is an experienced company in the field of sanitary and heating technology. The core activities of the company include: Sanitary Service: installation, maintenance and repair of sanitary facilities; Heating Service: installation, maintenance and repair of heating systems; Minor renovations: carrying out small renovations and refurbishments in the field of sanitary and heating technology; Maintenance work: regular maintenance and inspection of sanitary and heating systems; Water hygiene: consulting and implementing measures to ensure water hygiene. The company offers customized solutions with state-of-the-art technology and focuses on customer orientation and comprehensive service.

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Offering

Products & services

Industry:Plumbing & Building Services
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4.0/5

Haustechnik Service Zürich AG

✓ Offered6
Sanitary service
Sanitary repairs, boiler descaling, water damage, building inspections, winter shut-down and commissioning, as well as a 24/7 on-call service for urgent sanitary problems.
Heating service
Repair work, plant replacement and 24/7 on-call service for heating systems, including fast help with heating problems and restoring heat supply.
General contractor services
General contractor services for construction projects, from defining the project scope to planning and construction management, including cost control, handovers and warranty.
Minor renovations
Minor renovations including bathroom conversions, kitchen replacement, distributor replacement, pipework replacement and boiler replacement, including advice and coordination of the work.
Maintenance work
Maintenance work with boiler descaling, filter replacement, winter shut-down and commissioning, water softening systems and building inspections to ensure system operation.
Water hygiene
Water hygiene with monitoring of water quality, inspection of the sanitary installation, advice and water treatment including water softening and desalination.
Trust & reputation

ranQ Trust Score of Haustechnik Service Zürich AG: 4.0 out of 5.0

Trust Score4.0/ 5.0

High

x

Data basis 96% · As of October 2026

Haustechnik Service Zürich AG scores 77.5 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.80.624%
  • 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.55.910%
  • 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%
Haustechnik Service Zürich AG scores 64.1 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%
Haustechnik Service Zürich 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%
Haustechnik Service Zürich AG scores 2.0 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 35.2.04%
  • Media authority: No data point — the criterion is taken out of the weighting and does not lower the score.—4%
Qualifications+0.00

Haustechnik Service Zürich AG reaches a ranQ Trust Score of 4.0 out of 5.0 — rated «High». The rating draws, among other things, on 5.0 out of 5 stars from 8 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 8 reviews across all connected sources

Sources
GGoogle58
★TrustpilotSoon
PProvenExpertSoon

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

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Location

Dörflistrasse 30
8057 Zurich
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
Closed
Sun
Closed

At a glance

Legal form
Corporation
UID
CHE-417.549.673
Founded
2023 · 3 years
Last commercial register change
December 20, 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.
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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