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© 2026 cohaga AG · All Rights Reserved · St. Gallen, Switzerland · Imprint745,629 companies indexed · Last updated: today
DirectoryConstruction & ArchitectureSpecialized Construction ActivitiesBolligenPrometplan AG
Prometplan AG Logo
Verified· 3 sourcesTrust Score
Summary

About the company

The core activity of prometplan ag is facade planning, particularly the development and planning of complex building envelopes for architects, general planners and building owners. This includes the development of economically and aesthetically optimal facade constructions, compliance with applicable standards and energy requirements, as well as the creation of precise tender documents and detailed design details.

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Products & services

Industry:Specialized Construction Activities
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4.1/5

Prometplan AG

✓ Offered5
Facade planning and specialist consulting
Holistic, product-neutral consulting in the building envelope, feasibility and concept studies, condition analyses of existing façade structures, and development of façade and refurbishment concepts.
Design and tendering of façades
Preparation of project principle drawings, guide details and precise tender documents with technical prerequisites, bill of quantities and quantity take-offs for window and façade construction.
Client and QA/QS support
Client QA/QS mandates, second opinions in all project phases, expert review of bids, support during contract award, and checking approval drawings and façade samples.
Site supervision and specialist construction management
Construction site supervision, monitoring of execution, specialist construction management, development and supervision of façade mock-ups, and quality checks up to construction acceptance.
Expert reports for metal and façade construction
Expert reports and expert opinions in metal and façade construction, supplemented by cost estimation and monitoring of project costs.
Trust & reputation

ranQ Trust Score of Prometplan AG: 4.1 out of 5.0

Trust Score4.1/ 5.0

High

x

Data basis 96% · As of October 2026

Prometplan AG scores 65.0 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.73.124%
  • 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.35.310%
  • 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%
Prometplan 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%
Prometplan AG scores 85.0 out of 100 points in the Identity area of the ranQ Trust Score. This area carries 22% of the weighting.
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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%
Prometplan AG scores 8.9 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 35.8.94%
  • Media authority: No data point — the criterion is taken out of the weighting and does not lower the score.—4%
Qualifications+0.00

Prometplan 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 3 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 3 reviews across all connected sources

Sources
GGoogle53
★TrustpilotSoon
PProvenExpertSoon

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

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Location

Eisengasse 18
3065 Bolligen

At a glance

Legal form
Corporation
UID
CHE-103.857.813
Founded
1994 · 32 years
Last commercial register change
December 31, 2024
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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