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© 2026 cohaga AG · All Rights Reserved · St. Gallen, Switzerland · Imprint745,937 companies indexed · Last updated: today
DirectoryCrafts & TradesPlumbing & Building ServicesBaselRosenmund Haustechnik AG
Rosenmund Haustechnik AG Logo
Verified· 3 sourcesTrust Score
Summary

About the company

Rosenmund Haustechnik AG is a building services company that plans, installs and services heating, ventilation, cooling, sanitary systems and pipeline construction. The company also provides energy and consultation services, maintenance and a 24‑hour emergency on‑call service.

AI-generated
Offering

Products & services

Industry:Plumbing & Building Services
✓ Offered8
Building services engineering
Building services engineering for new builds, conversions and renovations in heating, ventilation, refrigeration and plumbing; planning, construction, sustainable solutions and ongoing service.
Heating
Heating solutions for single-family homes, multi-family buildings, office complexes and industrial plants; consultation, planning, new construction, modernisation, repairs, maintenance and service.
Plumbing
Plumbing solutions for new builds, conversions and refurbishment; repairs, bathroom refits, installations, maintenance and emergency service for residential and industrial properties.
Ventilation
Ventilation solutions for single-family homes, Minergie multi-family buildings, office complexes and industrial halls; development, construction, repair, maintenance and commissioning.
Refrigeration
Refrigeration and air-conditioning systems for residential, office and industrial buildings as well as labs and the hospitality sector; planning, construction, repairs and regular maintenance.
Pipework construction
Pipework systems for heating, industry, refrigeration and plumbing; planning, fabrication, installation, welding, stress calculations, seismic safety and declarations of conformity.
Service
Maintenance, repairs and 24-hour emergency service for heating, ventilation, refrigeration and plumbing systems, as well as ongoing care and optimisation of existing systems.
Energy and impulse consulting
Analysis of energy usage, development of measures and personal on-site consulting for sustainable heating systems for single- and multi-family homes, industrial and complex facilities.
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4.2/5

Rosenmund Haustechnik AG

Trust & reputation

ranQ Trust Score of Rosenmund Haustechnik AG: 4.2 out of 5.0

Trust Score4.2/ 5.0

Very high

x

Data basis 88% · As of October 2026

Rosenmund Haustechnik AG scores 60.3 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.43.724%
  • 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.100.010%
  • Review recency: No data point — the criterion is taken out of the weighting and does not lower the score.—8%
Rosenmund Haustechnik AG scores 97.4 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.96.07%
Rosenmund Haustechnik AG scores 83.3 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).83.322%
Rosenmund Haustechnik AG scores 68.6 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 35.68.64%
  • Media authority: No data point — the criterion is taken out of the weighting and does not lower the score.—4%
Qualifications+0.00

Rosenmund Haustechnik AG reaches a ranQ Trust Score of 4.2 out of 5.0 — rated «Very high». The rating draws, among other things, on 3.8 out of 5 stars from 57 customer reviews. The data basis is 88%, 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
3.8
of 5

Aggregated from 57 reviews across all connected sources

Sources
GGoogle3.857
★TrustpilotSoon
PProvenExpertSoon

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

Knowledge

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Location

Reinacherstrasse 261
4002 Basel
Opening hours
Mon
07:00 - 11:45, 13:15 - 16:45
Tue
07:00 - 11:45, 13:15 - 16:45
Wed
07:00 - 11:45, 13:15 - 16:45
Thu
07:00 - 11:45, 13:15 - 16:45
Fri
07:00 - 11:45, 13:15 - 15:45
Sat
24h
Sun
24h

At a glance

Legal form
Corporation
UID
CHE-105.980.577
Founded
1998 · 28 years
Last commercial register change
July 21, 2025
Employees
101 to 500
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.85.03%
    • Full methodology

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