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

About the company

The core activity of Ackermann Bau AG consists of two main areas: 1. **Construction Company**: The company offers services in the fields of civil engineering, construction, renovations, and customer-specific masonry work. 2. **Quarry**: The Tiergarten quarry is another important part of the company, where the red Melser stone Verrucano (slate and rock) is extracted.

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Products & services

Industry:Building Construction
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4.3/5

Ackermann Bau AG

Civil Engineering
✓ Offered5
Building and civil engineering
Building and civil engineering, including shell construction, excavation of building pits, utility line construction, sewer systems, shoring of excavation pits, slope stabilisation and site works.
Conversions / renovations
Conversions and renovations for apartment conversions, extensions, complex conversion work, and adaptations to existing building structures.
Masonry work for clients
Masonry work for clients from site inspection and quotation through to execution, including heat-pump bases, paved areas with interlocking stones, repairs, gas connections and entrance staircases.
Quarrying and natural stone products
Extraction and processing of Melser Verrucano schist and rock, as well as natural stone products for construction, garden and home, including slabs, masonry stones, stairs and fountains.
Stone processing
Stone processing with saws, milling, splitting, drilling, bush-hammering, grinding, sandblasting and edge finishing; on request also with specialists for further work.
Trust & reputation

ranQ Trust Score of Ackermann Bau AG: 4.3 out of 5.0

Trust Score4.3/ 5.0

Very high

x

Data basis 100% · As of October 2026

Ackermann Bau AG scores 88.2 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.87.924%
  • 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.88.910%
  • 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%
Ackermann Bau AG scores 85.5 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.55.07%
Ackermann Bau 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%
Ackermann Bau AG scores 11.5 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 35.22.94%
  • Media authority: Quality and number of editorial mentions, weighted by the importance of the source, plus the recency of the latest high-quality mention.0.04%
Qualifications+0.00

Ackermann Bau AG reaches a ranQ Trust Score of 4.3 out of 5.0 — rated «Very high». The rating draws, among other things, on 4.9 out of 5 stars from 32 customer reviews. As of October 2026.

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

Reviews

Aggregated rating

Aggregated rating
4.9
of 5

Aggregated from 32 reviews across all connected sources

Sources
GGoogle4.932
★TrustpilotSoon
PProvenExpertSoon

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

Press

Media

November 5, 2025Media
Psychiatrie St. Gallen und Ackermann Bau werden ausgezeichnet
sarganserlaender.ch

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Location

Zeughausstrasse 6
8887 Mels
Opening hours
Mon
07:30 - 12:00, 13:00 - 17:30
Tue
07:30 - 12:00, 13:00 - 17:30
Wed
07:30 - 12:00, 13:00 - 17:30
Thu
07:30 - 12:00, 13:00 - 17:30
Fri
07:30 - 12:00, 13:00 - 17:30
Sat
Closed
Sun
Closed

At a glance

Legal form
Corporation
UID
CHE-107.292.904
Founded
1979 · 47 years
Last commercial register change
January 6, 2022
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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