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© 2026 cohaga AG · All Rights Reserved · St. Gallen, Switzerland · Imprint745,937 companies indexed · Last updated: today
DirectoryConstruction & ArchitectureGeneral ContractorsAltdorf UrPORR SUISSE AG
PORR SUISSE AG Logo
Verified· 4 sourcesTrust Score
Summary

About the company

PORR SUISSE AG provides comprehensive construction services as a general construction contractor, focusing on building construction, civil and structural engineering, infrastructure and tunnel works, as well as specialized deep foundation, geotechnical and environmental engineering.

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Products & services

Industry:General Contractors
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4.0/5

PORR SUISSE AG

✓ Offered6
Building construction
Building construction as a general and total contractor for large projects and smaller building projects; planning, execution and handover of building construction projects in Switzerland.
Civil engineering
Civil engineering and civil works for small repair jobs up to complex large-scale construction projects; bridge, rail, flood protection, industrial and power plant construction.
Infrastructure / Tunnel construction
Infrastructure and tunnel construction for transport infrastructure projects; bridges, culverts, underpasses, tunnels in open or cut-and-cover construction, railway facilities, power plants, motorways and utility works.
Special deep construction / Rock engineering
Special deep construction with foundations, subsoil sealing as well as rock, slope and structural stabilisation; rock engineering for anchoring and securing works in difficult terrain.
Geotechnical engineering
Geotechnical engineering with pile foundations, subsoil investigations and vibration measurements; pile foundations, site investigations and monitoring in accordance with Swiss standards.
Environmental technology
Environmental technology for remediation of pollutants and environmental consulting; asbestos, PCB and PAH remediation as well as mould fungus analyses and mould remediation.
Trust & reputation

ranQ Trust Score of PORR SUISSE AG: 4.0 out of 5.0

Trust Score4.0/ 5.0

High

x

Data basis 100% · As of October 2026

PORR SUISSE AG scores 49.8 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.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%
PORR SUISSE AG scores 95.5 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%
PORR SUISSE AG scores 86.7 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).86.722%
PORR SUISSE AG scores 55.0 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 35.100.04%
  • Media authority: Quality and number of editorial mentions, weighted by the importance of the source, plus the recency of the latest high-quality mention.10.04%
Qualifications+0.00

PORR SUISSE AG reaches a ranQ Trust Score of 4.0 out of 5.0 — rated «High». The rating draws, among other things, on 5.0 out of 5 stars from 1 customer reviews. 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.

Press

Media

August 31, 2021Media
Neuer Partner für die Bolfing AG
bote.ch
November 13, 2018Media
Baustart für neues Dotierkraftwerk erfolgt
urnerwochenblatt.ch
December 5, 2017Media
Baloise Park: Porr Suisse erhält Totalunternehmer-Aufträge
immobilienbusiness.ch

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Comparisons

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Location

Seedorferstrasse 56
6460 Altdorf Ur
Opening hours
Mon
08:00 - 12:00, 13:00 - 17:00
Tue
08:00 - 12:00, 13:00 - 17:00
Wed
08:00 - 12:00, 13:00 - 17:00
Thu
08:00 - 12:00, 13:00 - 17:00
Fri
08:00 - 12:00, 13:00 - 17:00
Sat
Closed
Sun
Closed

At a glance

Legal form
Corporation
UID
CHE-105.738.898
Founded
1975 · 51 years
Last commercial register change
August 20, 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.100.03%
    • Full methodology

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