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

About the company

The core activity of Gruenberg + Partner encompasses consulting services in the areas of construction economics, organization and construction management as well as energy and building technology.

AI-generated
Offering

Products & services

Industry:Technical Consulting & Engineering
✓ Offered11
Planning and implementation of energy and building services
Planning, implementation and operational management of energy and building services, with BIM, interdisciplinary project teams and a focus on energy-optimised, sustainable solutions.
Heating design and heating implementation
Design, implement and ensure operational management of heating systems: heat where needed and use waste heat where possible.
Cooling system planning and refrigeration systems
Design and implement sustainable and efficient cooling and refrigeration systems.
BIM planning for building services
Comprehensive planning of building services installations, including clash-free modelling in networked, interdisciplinary project teams.
Building automation
Clear, consistent and operation-oriented information across the management, automation and field levels.
Ventilation and air-conditioning planning
Design, implement and ensure operational management of residential ventilation, hygiene ventilation and precision air-conditioning systems.
Energy consulting and energy solutions
Sustainable and efficient solutions for energy-related issues, focusing on optimised consumption and minimal energy input.
Sanitary planning
Comprehensive, water-compliant planning from the building entry point via the roof to site drainage.
Client advisory
Consulting and client advisory for energy and building services projects.
General planning
General planning and spatial as well as technical coordination of energy and building services projects.
Technical site supervision
Technical site supervision, simulations, hygiene and sustainability as additional services during project execution.
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4.1/5

Gruenberg + Partner AG

Trust & reputation

ranQ Trust Score of Gruenberg + Partner AG: 4.1 out of 5.0

Trust Score4.1/ 5.0

High

x

Data basis 96% · As of October 2026

Gruenberg + Partner AG scores 61.4 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.76.724%
  • 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.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.35.08%
Gruenberg + Partner AG scores 92.3 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.82.07%
Gruenberg + Partner 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%
Gruenberg + Partner AG scores 42.9 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 35.42.94%
  • Media authority: No data point — the criterion is taken out of the weighting and does not lower the score.—4%
Qualifications+0.00

Gruenberg + Partner AG reaches a ranQ Trust Score of 4.1 out of 5.0 — rated «High». The rating draws, among other things, on 5.0 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
5
of 5

Aggregated from 5 reviews across all connected sources

Sources
GGoogle55
★TrustpilotSoon
PProvenExpertSoon

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

Knowledge

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Comparisons

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Location

Nordstrasse 31
8006 Zurich
Opening hours
Mon
07:00 - 12:00, 13:00 - 17:00
Tue
07:00 - 12:00, 13:00 - 17:00
Wed
07:00 - 12:00, 13:00 - 17:00
Thu
07:00 - 12:00, 13:00 - 17:00
Fri
07:00 - 12:00, 13:00 - 16:00
Sat
Closed
Sun
Closed

At a glance

Legal form
Corporation
UID
CHE-105.957.673
Founded
1974 · 52 years
Last commercial register change
September 9, 2026
Employees
21 to 50
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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