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© 2026 cohaga AG · All Rights Reserved · St. Gallen, Switzerland · Imprint745,887 companies indexed · Last updated: today
DirectoryBusiness & Technical ServicesTechnical Consulting & EngineeringBaselKalt & Halbeisen Ingenieurbüro AG
Kalt & Halbeisen Ingenieurbüro AG Logo
Verified· 3 sourcesTrust Score
Summary

About the company

Kalt & Halbeisen Ingenieurbüro AG is an engineering and planning firm focused on energy and building services. It designs and implements HVAC, sanitary, sprinkler, energy management and building automation systems, and provides services such as energy concepts, BIM coordination, monitoring/optimization and technical consulting for hospitals, laboratories, industrial and residential/commercial projects.

AI-generated
Offering

Products & services

Industry:Technical Consulting & Engineering
✓ Offered6
HVAC / BA
Integrated energy and building services design for heating and cooling, ventilation and air conditioning, plumbing and sprinklers, as well as building automation.
Energy / Concepts
Comprehensive energy concepts with energy flow analyses, simulations, cost-effectiveness comparisons, renewable energies, water reuse, rainwater use, and energy storage.
Coordination / BIM
Digital specialist coordination with BIM, clash detection, cross-discipline coordination, quality assurance, and optimization of communication between project stakeholders.
Innovation / Digital construction
BIM-supported project planning and delivery, Virtual Design and Construction, digital twins, and smart-building concepts for construction projects.
Consulting / Expertise
Client representation and client advisory, quality assurance in planning and construction, project-specific quality management, and support for competitions.
Monitoring / Optimisation
Energy monitoring and ongoing optimisation of heating, cooling, ventilation, air-conditioning and media systems using data analysis, control adjustments, and heat recovery.
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4.0/5

Kalt & Halbeisen Ingenieurbüro AG

Trust & reputation

ranQ Trust Score of Kalt & Halbeisen Ingenieurbüro AG: 4.0 out of 5.0

Trust Score4.0/ 5.0

High

x

Data basis 96% · As of October 2026

Kalt & Halbeisen Ingenieurbüro AG scores 65.7 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.70.024%
  • 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.45.610%
  • 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%
Kalt & Halbeisen Ingenieurbüro AG scores 71.4 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.70.212%
  • 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.70.07%
Kalt & Halbeisen Ingenieurbüro 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%
Kalt & Halbeisen Ingenieurbüro AG scores 71.4 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 35.71.44%
  • Media authority: No data point — the criterion is taken out of the weighting and does not lower the score.—4%
Qualifications+0.00

Kalt & Halbeisen Ingenieurbüro AG reaches a ranQ Trust Score of 4.0 out of 5.0 — rated «High». The rating draws, among other things, on 4.6 out of 5 stars from 5 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
4.6
of 5

Aggregated from 5 reviews across all connected sources

Sources
GGoogle4.65
★TrustpilotSoon
PProvenExpertSoon

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

Knowledge

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Location

Rotterdam-Strasse 21
4053 Basel
Opening hours
Mon
08:00 - 17:00
Tue
08:00 - 17:00
Wed
08:00 - 17:00
Thu
08:00 - 17:00
Fri
08:00 - 17:00
Sat
Closed
Sun
Closed

At a glance

Legal form
Branch
UID
CHE-198.912.741
Founded
2020 · 6 years
Last commercial register change
December 16, 2020
Employees
11 to 20
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.76.06%
  • 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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