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© 2026 cohaga AG · All Rights Reserved · St. Gallen, Switzerland · Imprint745,937 companies indexed · Last updated: today
DirectoryCrafts & TradesSheet Metal WorkWangen An Der AareRosenast Immobilien AG
Rosenast Immobilien AG Logo
Verified· 3 sourcesTrust Score
Summary

About the company

The core activity of Rosenast Haustechnik AG includes the planning, installation, maintenance and repair of building technology systems, particularly: sanitary installations, heating systems, plumbing, controlled residential ventilation, central vacuum systems, water softening systems, and rainwater harvesting and garden irrigation systems. The company also provides consulting and service in these areas.

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Products & services

Industry:Sheet Metal Work
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Rosenast Immobilien AG

✓ Offered9
Sanitary installations
Sanitary installations for conversions, new builds and repairs; cold, hot and waste water pipes, kitchen, bathroom and toilets, water heating, rainwater use, water softening and dosing systems, pressure boosting, pump systems.
Heating systems
Heating systems for renovations, new installations and repairs; heat pumps, oil and gas heating systems, pellet heating systems, logwood heating systems, as well as radiators and floor heating.
Sheet metal work
Sheet metal work for new builds and conversions; lightning protection systems, repairs and renovations, pitched and flat roof sheet metal work, sheet metal roofs, sheet metal cladding, gutters, eaves flashing, chimney casings and general building sheet metal work.
Rainwater harvesting, garden irrigation
Rainwater harvesting for gardens and buildings; rainwater storage tank, water trap at the roof water outlet, underground tank with submersible pump, garden irrigation and use of rainwater in the building.
Controlled home ventilation
Controlled home ventilation for new builds and renovations; comfort ventilation as well as bathroom and kitchen extract ventilation for single-family houses and multi-storey construction.
Repairs and service
Repairs and service for taps, sanitary appliances and fittings; boiler descaling, replacement of appliances, supply and installation of washing and drying machines, dishwashers as well as water softening and pressure boosting systems.
Planning and consulting
Planning and consulting for building technology projects; competent consulting, tender document processing, execution planning, design of bathroom renovations, system sizing, on-site measurements for conversion work and concept development.
Descaling systems
Descaling systems, dosing systems and water softening systems to reduce limescale deposits, protect water pipes and improve water consumption in the household.
Central vacuum systems
Central vacuum systems for new installations and retrofits; units in the basement, vacuum inlets at agreed locations, easier cleaning, less dust being stirred up and lower noise levels.
Trust & reputation

ranQ Trust Score of Rosenast Immobilien AG: 4.3 out of 5.0

Trust Score4.3/ 5.0

Very high

x

Data basis 96% · As of October 2026

Rosenast Immobilien AG scores 81.6 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.82.524%
  • 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.68.910%
  • 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%
Rosenast Immobilien AG scores 84.6 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.97.712%
  • 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%
Rosenast Immobilien 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%
Rosenast Immobilien AG scores 14.0 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 35.14.04%
  • Media authority: No data point — the criterion is taken out of the weighting and does not lower the score.—4%
Qualifications+0.00

Rosenast Immobilien AG reaches a ranQ Trust Score of 4.3 out of 5.0 — rated «Very high». The rating draws, among other things, on 4.9 out of 5 stars from 14 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
4.9
of 5

Aggregated from 14 reviews across all connected sources

Sources
GGoogle4.914
★TrustpilotSoon
PProvenExpertSoon

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

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Location

Wangenriedstrasse 2
3380 Wangen An Der Aare
Opening hours
Mon
07:30 - 11:45, 13:15 - 17:30
Tue
07:30 - 11:45, 13:15 - 17:30
Wed
07:30 - 11:45, 13:15 - 17:30
Thu
07:30 - 11:45, 13:15 - 17:30
Fri
07:30 - 11:45, 13:15 - 17:00
Sat
Closed
Sun
Closed

At a glance

Legal form
Corporation
UID
CHE-272.786.228
Founded
2012 · 14 years
Last commercial register change
November 25, 2025
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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