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© 2026 cohaga AG · All Rights Reserved · St. Gallen, Switzerland · Imprint745,629 companies indexed · Last updated: today
DirectoryBusiness & Technical ServicesTechnical Consulting & EngineeringWinterthurconcept-g AG
concept-g AG Logo
Verified· 3 sourcesTrust Score
Summary

About the company

The core activity of CONCEPT-G AG is consulting and planning building technology, particularly in the areas of heating, air conditioning, ventilation, sanitation and specialist coordination. The company offers individual planning, consulting and support in defining needs, evaluating energy-efficient energy concepts, calculating economic viability and performing life cycle assessments of heat generation systems. It supports customers in planning and implementing building technology projects and also provides services such as condition and vulnerability analyses, creation of energy certificates and overall project management.

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Products & services

Industry:Technical Consulting & Engineering
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3.8/5

concept-g AG

✓ Offered6
HVAC-S consulting & planning
Consulting and planning for building services engineering and energy supply, with an individual concept, project management, specialist site supervision, implementation, monitoring, acceptance and expert reports.
Heating
Planning of heat generation plants and heat distribution systems for residential buildings up to district heating networks, including system comparison, investment and operating costs as well as environmental compatibility.
Sanitary systems
Planning of sanitary installations for buildings and all types of uses, including fixtures and equipment, wet fire-fighting systems, water treatment, domestic hot water generators, gas supply and technical compressed-air systems.
Air-conditioning cooling
Planning of refrigeration systems for air-conditioning of buildings, including selection of the appropriate refrigerant considering ChemRRV and the cost-benefit ratio.
Specialist coordination
Coordination of spatial requirements and technical interfaces of all specialist trades to achieve a functional overall project.
Sewer and utility lines
Planning of water, sewer and district heating lines on the plot of the construction site for optimal servicing and connection.
Trust & reputation

ranQ Trust Score of concept-g AG: 3.8 out of 5.0

Trust Score3.8/ 5.0

High

x

Data basis 96% · As of October 2026

concept-g AG scores 47.2 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.63.624%
  • 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.17.610%
  • 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.35.08%
concept-g 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%
concept-g 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%
concept-g AG scores 7.4 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 35.7.44%
  • Media authority: No data point — the criterion is taken out of the weighting and does not lower the score.—4%
Qualifications+0.00

concept-g AG reaches a ranQ Trust Score of 3.8 out of 5.0 — rated «High». The rating draws, among other things, on 4.0 out of 5 stars from 1 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
of 5

Aggregated from 1 reviews across all connected sources

Sources
GGoogle41
★TrustpilotSoon
PProvenExpertSoon

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

Knowledge

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Location

Rychenbergstrasse 67
8400 Winterthur
Opening hours
Mon
07:30 - 17:30
Tue
07:30 - 17:30
Wed
07:30 - 17:30
Thu
07:30 - 17:30
Fri
07:30 - 17:30
Sat
Closed
Sun
Closed

At a glance

Legal form
Corporation
UID
CHE-261.963.437
Founded
2012 · 14 years
Last commercial register change
June 26, 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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