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© 2026 cohaga AG · All Rights Reserved · St. Gallen, Switzerland · Imprint745,629 companies indexed · Last updated: today
DirectoryConstruction & ArchitectureArchitecture FirmsMenzingenJoël Wollenmann AG
Joël Wollenmann AG Logo
Verified· 3 sourcesTrust Score
Summary

About the company

Joël Wollenmann AG is a construction management firm that oversees building construction projects and provides services from feasibility studies and cost planning to site management and final project handover. Services include tendering and contract management, quality/cost/schedule monitoring, commissioning and preparation of construction documentation.

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Products & services

Industry:Architecture FirmsConstruction & Project Management
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Joël Wollenmann AG

General Contractors
✓ Offered10
Construction project management
Construction project management from the feasibility study to the turnkey handover of the building, including construction cost planning, scheduling, quality and construction cost monitoring.
Construction supervision and site management
On-site construction supervision and site management with tenders, contract awards, work contracts, measurement and invoice control, works acceptance and commissioning.
Analyses and feasibility studies
Analyses and feasibility studies for construction projects as a basis for planning, cost estimates and further project decisions.
Construction cost planning
Construction cost planning for new builds, conversions and renovations, complemented by ongoing construction cost control during execution.
Scheduling and schedule monitoring
Scheduling as well as quality, construction cost and schedule monitoring during realization up to handover.
Tenders, contract awards and work contracts
Tenders, contract awards and work contracts for preparing and contractually securing construction services.
Works acceptance and construction settlement
Works acceptance, commissioning and construction settlement as closing services up to the handover of the building.
Organisation and management of warranty works
Organisation and management of the two-year warranty works after the handover of the building.
Construction documentation and regulatory requirements monitoring
Control of regulatory requirements as well as preparation of the construction documentation for the project.
Planning and realization of new builds, conversions and renovations
Planning and support for new builds, conversions and renovations in the high-rise sector, focusing on demanding construction projects.
Trust & reputation

ranQ Trust Score of Joël Wollenmann AG: 3.7 out of 5.0

Trust Score3.7/ 5.0

Solid

x

Data basis 96% · As of October 2026

Joël Wollenmann AG scores 49.8 out of 100 points in the Reputation area of the ranQ Trust Score. This area carries 42% of the weighting.
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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.68.224%
  • 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%
Joël Wollenmann AG scores 74.8 out of 100 points in the Substance area of the ranQ Trust Score. This area carries 28% of the weighting.
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CriterionValueWeight
  • Establishment: Years since founding or brand launch, logarithmic. The maximum is reached at 15 years.75.012%
  • 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.55.07%
Joël Wollenmann AG scores 83.3 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).83.322%
Joël Wollenmann AG scores 5.7 out of 100 points in the Visibility area of the ranQ Trust Score. This area carries 8% of the weighting.
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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 35.5.74%
  • Media authority: No data point — the criterion is taken out of the weighting and does not lower the score.—4%
Qualifications+0.00

Joël Wollenmann AG reaches a ranQ Trust Score of 3.7 out of 5.0 — rated «Solid». The rating draws, among other things, on 5.0 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
5
of 5

Aggregated from 1 reviews across all connected sources

Sources
GGoogle51
★TrustpilotSoon
PProvenExpertSoon

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

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Location

Haldenstrasse 21
6313 Menzingen

At a glance

Legal form
Corporation
UID
CHE-479.617.266
Founded
2019 · 7 years
Last commercial register change
November 8, 2019
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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