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

About the company

Marolf Haustechnik AG is a building services company offering planning, installation and maintenance of sanitary, heating and water-pipeline systems. Services include bathroom renovations, water and wastewater installations, boiler servicing and a 24-hour emergency service.

AI-generated
Offering

Products & services

Industry:Plumbing & Building Services
✓ Offered12
Sanitary systems consulting and design
Consulting in all areas of sanitary engineering, design for residential construction, public buildings, office and administration buildings as well as industry and commercial sites; 3D visualisation, coordination and execution of sanitary projects.
Water, gas and compressed-air installations
Installation of water, wastewater, gas and compressed-air lines in new-build and renovation projects; mounting of sanitary fixtures, testing and regulating of the systems.
Bathroom refurbishment
Bathroom refurbishments with planning, 3D virtualisation, construction scheduling, appointment timetable and coordination of all trades involved; implementation from a single source.
Heating system renovation
Renovation and replacement of heating systems with planning, consulting and implementation; heat pumps, wood heating systems, district heating, solar energy as well as oil and gas heating systems are addressed.
Heating systems design
Design of heating systems for different buildings and setups, including combinations and clarifying the appropriate heating solution depending on the building and requirements.
Heating with heat pumps
Heating solutions with heat pumps for buildings with lower flow temperatures; advice on suitability, efficiency and combination with additional systems.
Heating with oil and gas
Heating solutions with oil and gas boilers as well as renovation of existing systems; including consulting on suitability, regulations and alternatives.
Heating with wood, pellets and district heating
Heating solutions with wood, pellets and district heating as renewable alternatives; advice on selection and on combining with other heating systems.
Heating with thermal solar systems
Use of thermal solar systems for heat and domestic hot-water generation; offered as part of heating and building-services planning.
Comfort ventilation systems
Planning and installation of comfort ventilation systems as part of heating and building-services services.
Building drainage
Planning and execution of building drainage and wastewater pipes, including building drainage and connection to the sewer system.
Rainwater harvesting and water treatment systems
Rainwater harvesting systems and water treatment systems for buildings; consulting, design and installation in the area of sanitary engineering and building services.
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4.3/5

Marolf Haustechnik AG

Trust & reputation

ranQ Trust Score of Marolf Haustechnik AG: 4.3 out of 5.0

Trust Score4.3/ 5.0

Very high

x

Data basis 96% · As of October 2026

Marolf Haustechnik AG scores 73.1 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.71.324%
  • 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.73.510%
  • 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%
Marolf 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%
Marolf 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.
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%
Marolf Haustechnik AG scores 51.4 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 35.51.44%
  • Media authority: No data point — the criterion is taken out of the weighting and does not lower the score.—4%
Qualifications+0.00

Marolf Haustechnik AG reaches a ranQ Trust Score of 4.3 out of 5.0 — rated «Very high». The rating draws, among other things, on 4.5 out of 5 stars from 17 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 17 reviews across all connected sources

Sources
GGoogle4.517
★TrustpilotSoon
PProvenExpertSoon

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

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Location

Vinelzstrasse 44
3235 Erlach
Opening hours
Mon
07:30 - 12:00, 13:15 - 17:00
Tue
07:30 - 12:00, 13:15 - 17:00
Wed
07:30 - 12:00, 13:15 - 17:00
Thu
07:30 - 12:00, 13:15 - 17:00
Fri
07:30 - 12:00, 13:15 - 16:00
Sat
Closed
Sun
Closed

At a glance

Legal form
Corporation
UID
CHE-114.945.769
Founded
2009 · 17 years
Last commercial register change
July 2, 2020
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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