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

About the company

The core activity of Planforum AG is the planning and design of building technology systems, including heating, cooling, ventilation, climate control, plumbing, photovoltaics and building automation, as well as the provision of services such as energy consulting, specialist construction management and expertise in the field of building services planning and building technology planning.

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Products & services

Industry:Technical Consulting & Engineering
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4.2/5

Planforum AG

✓ Offered12
Energy consulting
Energy consulting at the start of the project, including variant comparisons and decision-making bases for efficient building services, alternative technologies, and Minergie and Passive House buildings.
Design and planning of building services
Design and planning of heating, ventilation, air-conditioning and sanitary systems from the preliminary project stage to handover to the client for residential, office, restaurant, commercial and public buildings.
Specialist site supervision
Specialist site supervision for building services projects, including support during execution in the areas of heating, ventilation, air-conditioning and sanitary systems.
Expertise
Expertise and technical support for building services projects, in particular when assessing solutions and making technical decisions.
Heating system planning
Planning of heating systems for residential, office, restaurant, commercial and public buildings, as well as for Minergie and Passive House projects.
Refrigeration and air-conditioning planning
Planning of refrigeration and air-conditioning systems as part of building services for different building types and use categories.
Ventilation planning
Planning of ventilation systems for residential, office, restaurant, commercial and public buildings.
Sanitary planning
Planning of sanitary systems for new buildings and other building services projects, complemented by specialist project management.
Sprinkler system planning
Planning of sprinkler systems as part of building services and technical fire protection.
Photovoltaic system planning
Planning of photovoltaic systems in connection with energy-efficient building services and energy optimization.
BIM
BIM applications for the planning and coordination of building services projects.
Specialist coordination
Specialist coordination for building services projects to align the technical trades.
Trust & reputation

ranQ Trust Score of Planforum AG: 4.2 out of 5.0

Trust Score4.2/ 5.0

Very high

x

Data basis 96% · As of October 2026

Planforum AG scores 66.3 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.77.424%
  • 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.52.910%
  • 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.50.08%
Planforum AG scores 89.3 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.70.07%
Planforum 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%
Planforum 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

Planforum AG reaches a ranQ Trust Score of 4.2 out of 5.0 — rated «Very high». The rating draws, among other things, on 4.9 out of 5 stars from 7 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 7 reviews across all connected sources

Sources
GGoogle4.97
★TrustpilotSoon
PProvenExpertSoon

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

Knowledge

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Location

Tösstalstrasse 12
8400 Winterthur
Opening hours
Mon
07:30 - 17:00
Tue
07:30 - 17:00
Wed
07:30 - 17:00
Thu
07:30 - 17:00
Fri
07:30 - 17:00
Sat
Closed
Sun
Closed

At a glance

Legal form
Corporation
UID
CHE-108.471.556
Founded
1996 · 30 years
Last commercial register change
September 13, 2021
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.
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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