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© 2026 cohaga AG · All Rights Reserved · St. Gallen, Switzerland · Imprint746,952 companies indexed · Last updated: today
DirectoryCrafts & TradesPlumberRorschachMayer Haustechnik AG
Mayer Haustechnik AG Logo
Verified· 4 sourcesTrust Score
Summary

About the company

Mayer Haustechnik AG plans and carries out sanitary installations and bathroom renovations, and provides sheet-metal roofing and building work. Its services also include boiler maintenance and the sale, installation and repair of household appliances.

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Service area

Offering

Products & services

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4.4/5

Mayer Haustechnik AG

✓ Offered7
Sanitary installations
Sanitary installations for single-family houses, residential and commercial buildings, as well as industrial facilities; water, wastewater, foul water, rainwater, compressed air and gas installations.
Bathroom planning and bathroom renovation
Bathroom planning, bathroom renovation and refurbishment of bathrooms; individual bathrooms in new and existing buildings, consultation, planning, coordination, site management and cost control.
Sheet metal work
Sheet metal work for metal on building sites; custom special fabrications, artistic ornaments, and modern and functional metal components tailored to individual requirements.
Boiler maintenance and boiler service
Boiler maintenance, boiler descaling, boiler cleaning and inspection of the safety valve, protective anode, thermostat and temperature control; replacement of boilers.
Shower WC
Consulting, planning and installation of shower WCs; models from Geberit, Laufen and La Preva, as well as clarification of feasibility in the bathroom.
Walk-in shower
Planning and installation of walk-in showers instead of the bathtub; bathroom renovations with on-site consultation.
Bathroom advice and showroom consulting
Free bathroom advice in the showroom, in the meeting room or at the customer’s home; support with selection, inspiration and project discussions.
Trust & reputation

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

Trust Score4.4/ 5.0

Very high

x

Data basis 100% · As of November 2026

Mayer Haustechnik AG scores 91.7 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.89.124%
  • 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.95.110%
  • 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%
Mayer Haustechnik AG scores 85.5 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.55.07%
Mayer Haustechnik AG scores 88.3 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).88.322%
Mayer Haustechnik AG scores 5.3 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 35.10.64%
  • Media authority: Quality and number of editorial mentions, weighted by the importance of the source, plus the recency of the latest high-quality mention.0.04%
Qualifications+0.00

Mayer Haustechnik AG reaches a ranQ Trust Score of 4.4 out of 5.0 — rated «Very high». The rating draws, among other things, on 4.9 out of 5 stars from 41 customer reviews. As of November 2026.

The Trust Score cannot be bought and is calculated from publicly verifiable data.

Reviews

Aggregated rating

Aggregated rating
4.9
of 5

Aggregated from 41 reviews across all connected sources

Sources
GGoogle4.941
★TrustpilotSoon
PProvenExpertSoon

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

Press

Media

September 1, 2023Media
Mayer Haustechnik Rorschach lädt ins Geschäft ein
rorschacherecho.ch

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Location

St. Gallerstrasse 15
9400 Rorschach
Opening hours
Mon
08:00 - 12:00, 13:30 - 18:30
Tue
08:00 - 12:00, 13:30 - 18:30
Wed
08:00 - 12:00, 13:30 - 18:30
Thu
08:00 - 12:00, 13:30 - 18:30
Fri
08:00 - 12:00, 13:30 - 18:30
Sat
09:00 - 13:00
Sun
Closed

At a glance

Legal form
Corporation
UID
CHE-110.089.137
Founded
2003 · 23 years
Last commercial register change
April 15, 2024
Employees
1 to 10

Active in 1 of 26 cantons · 1 municipality

  • SGRorschach
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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