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

About the company

The company provides services in the field of building technology, particularly in the areas of heating, plumbing and bathroom renovation. The core activities include planning, installation, maintenance and repair of heating systems, as well as the execution of bathroom renovations and heating system upgrades. The company also offers consulting and quotes for renewable heating systems and energy-saving solutions.

AI-generated
Offering

Products & services

Industry:Plumbing & Building Services
✓ Offered11
Heating system renovations
Heating system renovations, replacement and modernization of heating installations, advice on renewable heating systems, cost calculations and offers with alternative proposal options.
New heating installations
New heating installations with ground-source heat pumps, air/water heat pumps, wood-log heating systems, pellet, wood-chip, oil and gas heating systems, as well as hybrid units.
Solar installations
Thermal solar systems, design and installation with suitable solar collectors for sustainable heat generation and energy savings.
Plumbing work
All plumbing services from water supply to sewer systems, including drinking and hot water solutions, shower WC, hot-water preparation and water-softening systems.
Water supply
Service lines to the house, new connections to the water grid and water-supply works for private clients, as well as grid expansion for municipalities and corporations.
Bathroom renovations
Bathroom planning, concept, visualization, scheduling and complete execution of bathroom renovations, including site management, coordination and final cleaning.
Building conversions
Building conversion projects from A to Z with planning, visualization, coordination of trades and complete site management for bathrooms and other renovations.
Repairs and maintenance
Repair and maintenance work on heating systems and sanitary installations, maintenance, fault rectification and modernization as part of day-to-day operations.
On-call / emergency service
Emergency service outside opening hours for service and repair work related to building technology, including on-site intervention and phone availability.
Boiler descaling and filter cleaning
Boiler descaling, fine filter cleaning, heating system checks and other periodic service work on building installations.
Online service forms
Online submissions for service and repair requests, heating modernization and bathroom planning via digital request forms.
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4.4/5

Gebäudetechnik Estermann AG

Trust & reputation

ranQ Trust Score of Gebäudetechnik Estermann AG: 4.4 out of 5.0

Trust Score4.4/ 5.0

Very high

x

Data basis 96% · As of October 2026

Gebäudetechnik Estermann AG scores 75.4 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.71.424%
  • 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.74.910%
  • 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.88.08%
Gebäudetechnik Estermann AG scores 90.2 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.95.212%
  • 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%
Gebäudetechnik Estermann AG 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%
Gebäudetechnik Estermann AG scores 65.7 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 35.65.74%
  • Media authority: No data point — the criterion is taken out of the weighting and does not lower the score.—4%
Qualifications+0.00

Gebäudetechnik Estermann 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 18 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 18 reviews across all connected sources

Sources
GGoogle4.518
★TrustpilotSoon
PProvenExpertSoon

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

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Location

Sonnbüel 11a
6024 Hildisrieden
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
24h
Sun
24h

At a glance

Legal form
Corporation
UID
CHE-303.428.666
Founded
2013 · 13 years
Last commercial register change
November 11, 2024
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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