ranQ
ranQ
ranQ
DirectoryIndustriesPlacesKnowledgeComparisonsSoon
Sign inCheck visibility
ranQHSG Startup LabelRecognised by the
HSG Startup Label

The leading AI company directory, built to boost AI visibility.

DEENFRIT
Product
  • Pricing
  • Directory
  • Industries
  • Trust Score
Company
  • About
  • Contact
  • Legal
© 2026 cohaga AG · All Rights Reserved · St. Gallen, Switzerland · Imprint745,629 companies indexed · Last updated: today
DirectoryConstruction & ArchitectureBuilding ConstructionDoppleschwandPortmann Bau AG
Portmann Bau AG Logo
Verified· 3 sourcesTrust Score
Summary

About the company

Portmann Bau AG is a construction company focused on structural building and civil engineering. The company also provides services such as demolition, excavation, utility line construction, transport, natural road works, core drilling and wood energy solutions.

AI-generated
Offering

Products & services

Industry:Building ConstructionBuilding Maintenance
LeadhubOutbound Leads by COHAGA

Looking for direct email addresses and phone numbers?

Leadhub delivers verified contact details and decision-makers from over 750,000 Swiss companies — management, procurement, marketing, HR.

Discover Leadhub
3.8/5

Portmann Bau AG

Site Preparation
✓ Offered3
Building construction
Building construction for new builds, renewal projects and customer work; core drilling and surrounding-site works related to construction projects.
Civil engineering
Civil engineering with demolition, excavation, surrounding-site works, utility installation, transport and natural roads; also environmentally conscious construction projects.
Wood chip supply
Wood chips for wood energy, presented as a separate offering alongside building construction and civil engineering.
Trust & reputation

ranQ Trust Score of Portmann Bau AG: 3.8 out of 5.0

Trust Score3.8/ 5.0

High

x

Data basis 96% · As of October 2026

Portmann Bau AG scores 53.8 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.70.824%
  • 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.27.910%
  • 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.35.08%
Portmann Bau AG scores 82.0 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.83.012%
  • 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%
Portmann Bau 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%
Portmann Bau AG scores 0.9 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 35.0.94%
  • Media authority: No data point — the criterion is taken out of the weighting and does not lower the score.—4%
Qualifications+0.00

Portmann Bau AG reaches a ranQ Trust Score of 3.8 out of 5.0 — rated «High». The rating draws, among other things, on 5.0 out of 5 stars from 2 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 2 reviews across all connected sources

Sources
GGoogle52
★TrustpilotSoon
PProvenExpertSoon

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

Knowledge

No knowledge articles yet

Once Portmann Bau AG has claimed this profile, we'll publish editorial articles and case studies here together.

Get started
Comparisons

Portmann Bau AG in comparison

Soon

Industry comparisons are coming soon

We're preparing industry comparisons that rank Portmann Bau AG by reviews, experience and specialisations.

Is this your company?

Claim the company profile of Portmann Bau AG to make its contact details visible. With a plan we additionally create and publish industry comparisons, articles and much more.

Secure profile

Location

Pfrundmatte 7
6112 Doppleschwand
Opening hours
Mon
07:00 - 17:00
Tue
07:00 - 17:00
Wed
07:00 - 17:00
Thu
07:00 - 17:00
Fri
07:00 - 17:00
Sat
Closed
Sun
Closed

At a glance

Legal form
Corporation
UID
CHE-458.060.889
Founded
2017 · 9 years
Last commercial register change
September 15, 2026
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

    Similar companies

    PB
    PK Bau AG Schüpfheim
    Schüpfheim
    AB
    ALS Bau GmbH
    Buchs Lu
    LB
    LTL Bau AG
    Sempach Station
    AA
    Aregger AG
    Eschenbach Lu
    AA
    Aregger AG Bauunternehmung
    Buttisholz
    AB
    Amrein Bau AG
    Emmen
    AB
    Affentranger Bau AG
    Altbüron
    EG
    Emil Gloggner AG
    Ruswil