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© 2026 cohaga AG · All Rights Reserved · St. Gallen, Switzerland · Imprint745,629 companies indexed · Last updated: today
DirectoryConstruction & ArchitectureConstruction & Project ManagementAmriswilHeinz Giger GmbH
Heinz Giger GmbH Logo
Verified· 3 sourcesTrust Score
Summary

About the company

The core activity of Heinz Giger GmbH is the provision of services in the field of architecture and construction management, including construction supervision, cost management, consulting and planning of new buildings, conversions, renovations and public buildings.

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Offering

Products & services

Industry:Construction & Project Management
✓ Offered12
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3.8/5

Heinz Giger GmbH

Architecture
Architecture for public buildings, new builds, conversions and renovations; planning, design development and architectural support throughout construction projects.
Construction management | Site supervision
Construction management and site supervision with schedule planning, cost estimates, works contracts, site inspection, coordination, site meetings, construction log and warranty works.
Cost management
Cost management for construction projects with building cost estimation, cost analysis, cost comparisons, cost quotations, cost control and final project billing.
Construction consulting
Construction consultations for plots of land and existing properties; buildability assessment, usable volume, usable floor areas, feasibility studies and purchase advisory.
Building appraisals
Building appraisals and real-estate assessments for buying and selling; analysis of offers and inspection of the building fabric.
Building renovations | Change of use
Building renovations and change-of-use projects with building diagnostics, renovation concepts, maintenance plans, cost calculations as well as use and safety plans.
New builds
New builds for public buildings, residential properties, commercial and industrial facilities; references include service yards, halls, residential and commercial buildings.
Conversions
Conversions and extensions for residential, commercial, industrial and public buildings; including renovations, annexes and change of use.
Public buildings
Public buildings such as school buildings, gymnasiums, service yards, cemetery buildings and airport facilities.
Cost calculations
Cost calculations for public buildings, new builds and conversions; estimates and calculations for various project types.
Advisory mandates
Advisory mandates with maintenance and investment plans, change-of-use studies, income calculations, condition analyses and property valuations.
Competitions
Competitions, competition tenders and competition judging as cost planner.
Trust & reputation

ranQ Trust Score of Heinz Giger GmbH: 3.8 out of 5.0

Trust Score3.8/ 5.0

High

x

Data basis 96% · As of October 2026

Heinz Giger GmbH 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%
Heinz Giger GmbH scores 83.0 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.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%
Heinz Giger GmbH 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%
Heinz Giger GmbH scores 2.0 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 35.2.04%
  • Media authority: No data point — the criterion is taken out of the weighting and does not lower the score.—4%
Qualifications+0.00

Heinz Giger GmbH 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 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.

Knowledge

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Location

Breitenaachstrasse 1
8580 Amriswil

At a glance

Legal form
Limited Liability Company
UID
CHE-110.600.857
Founded
2004 · 22 years
Last commercial register change
September 3, 2026
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.
88.0
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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