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© 2026 cohaga AG · All Rights Reserved · St. Gallen, Switzerland · Imprint745,629 companies indexed · Last updated: today
DirectoryConstruction & ArchitectureBuilding ConstructionSchinznach DorfTreier AG
Treier AG Logo
Verified· 4 sourcesTrust Score
Summary

About the company

The core activity of TREIER AG is the provision of construction services, particularly in the fields of building construction, civil engineering, plastering, suction dredging, renovation, extension, refurbishment and monument preservation. The company offers a wide range of construction services and is involved in the planning, execution and maintenance of construction projects for private, industrial and public clients.

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Products & services

Industry:Building ConstructionBuilding Maintenance
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4.4/5

Treier AG

Civil Engineering
✓ Offered9
Building construction
New builds of single-family homes, residential developments, industrial facilities and commercial buildings; a classic master builder in building construction with modern tools and digitalisation.
Civil engineering
Preservation of value and renewal of infrastructure, surroundings and drainage; work on water pipes, utility rerouting and other civil engineering projects.
Plastering
Plastering work in new builds, conversions and in monument preservation; expert handling of historic building fabric and traditional craftsmanship.
Conversion
Conversions of existing buildings and rooms; remove existing walls and ceilings, close doors, open new windows and adapt uses.
Extension
Extensions to existing houses and buildings, such as additional rooms, terraces, garages or conservatories; implementation of conversion and extension projects.
Refurbishment
Refurbishment of apartments, single-family homes, farmhouses, façades and balconies; sewer systems and entire houses are also refurbished.
Renovation
Renovations of existing properties and rooms to renew substance and appearance; listed as a stand-alone service in the overview.
Monument preservation
Professional work on historic building fabric with traditional craftsmanship; preserving and supporting the handling of listed buildings.
Suction excavator
Suction excavator work for picking up material from wood chips to gravel, for example in the event of water main breaks or for removing slag; available on call 24 hours a day.
Trust & reputation

ranQ Trust Score of Treier AG: 4.4 out of 5.0

Trust Score4.4/ 5.0

Very high

x

Data basis 100% · As of October 2026

Treier AG scores 77.0 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.76.724%
  • 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.68.910%
  • 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.88.08%
Treier AG scores 92.2 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.95.212%
  • 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.90.07%
Treier 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%
Treier AG scores 59.8 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 35.82.94%
  • Media authority: Quality and number of editorial mentions, weighted by the importance of the source, plus the recency of the latest high-quality mention.36.74%
Qualifications+0.00

Treier AG reaches a ranQ Trust Score of 4.4 out of 5.0 — rated «Very high». The rating draws, among other things, on 4.7 out of 5 stars from 14 customer reviews. As of October 2026.

The Trust Score cannot be bought and is calculated from publicly verifiable data.

Reviews

Aggregated rating

Aggregated rating
4.7
of 5

Aggregated from 14 reviews across all connected sources

Sources
GGoogle4.714
★TrustpilotSoon
PProvenExpertSoon

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

Press

Media

July 10, 2026Media
Generationenwechsel bei Treier AG: Geschäftsführer Martin Kummer übergibt an seine Söhne
aargauerzeitung.ch
February 18, 2019Media
Vom Maurerlehrling zum Geschäftsleiter: Stabsübergabe bei Bauunternehmen Treier AG
aargauerzeitung.ch

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Location

Nebenbachweg 8
5107 Schinznach Dorf
Opening hours
Mon
07:30 - 12:00, 13:30 - 17:00
Tue
07:30 - 12:00, 13:30 - 17:00
Wed
07:30 - 12:00, 13:30 - 17:00
Thu
07:30 - 12:00, 13:30 - 17:00
Fri
07:30 - 12:00, 13:30 - 17:00
Sat
Closed
Sun
Closed

At a glance

Legal form
Corporation
UID
CHE-419.261.214
Founded
2013 · 13 years
Last commercial register change
July 21, 2026
Employees
51 to 100
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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