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© 2026 cohaga AG · All Rights Reserved · St. Gallen, Switzerland · Imprint745,629 companies indexed · Last updated: today
DirectoryConstruction & ArchitectureGeneral ContractorsLucerneHalterDeDonno GmbH
HalterDeDonno GmbH Logo
Verified· 3 sourcesTrust Score
Summary

About the company

The company HalterDeDonno primarily deals with architecture and construction, particularly with the planning, development and realization of construction projects such as new buildings, renovations, restorations and conversions of buildings, including single-family homes, multi-family homes, commercial buildings and other construction projects.

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Products & services

Industry:General Contractors
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3.7/5

HalterDeDonno GmbH

✓ Offered7
Architectural Design
Architectural design for conversions, full refurbishments and new builds; support through all planning and execution phases, including cost and schedule planning and client coordination.
Construction Management
Construction management for conversion, refurbishment and new-build projects; coordination of execution, schedule control and alignment of works during the project.
Cost Planning
Cost planning for conversion, refurbishment and new-build projects; project-based cost estimation and budget control through to execution.
Feasibility Studies
Feasibility studies for new builds, conversions and additions; preliminary assessments and studies for projects such as houses, city villas and hotel buildings.
Conversion and Refurbishment
Conversion and refurbishment of houses, apartments, façades and ancillary buildings; including concepts, execution drawings, building permit submissions and structural adaptations.
New-Build Planning
New-build planning for houses and residential buildings; from study and preliminary assessment to planning permission, execution drawings and construction management.
Conversions and Structural Adaptations for Existing Buildings
Conversions and structural adaptations to existing buildings such as hotels, houses and commercial buildings; including doors, windows, shutters, bathrooms and material concepts.
Trust & reputation

ranQ Trust Score of HalterDeDonno GmbH: 3.7 out of 5.0

Trust Score3.7/ 5.0

Solid

x

Data basis 96% · As of October 2026

HalterDeDonno GmbH scores 52.7 out of 100 points in the Reputation area of the ranQ Trust Score. This area carries 42% of the weighting.
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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.50.08%
HalterDeDonno GmbH scores 65.3 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.50.012%
  • 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%
HalterDeDonno GmbH scores 85.0 out of 100 points in the Identity area of the ranQ Trust Score. This area carries 22% of the weighting.
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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%
HalterDeDonno GmbH scores 4.3 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 35.4.34%
  • Media authority: No data point — the criterion is taken out of the weighting and does not lower the score.—4%
Qualifications+0.00

HalterDeDonno GmbH reaches a ranQ Trust Score of 3.7 out of 5.0 — rated «Solid». 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

Unterlachenstrasse 5
6005 Lucerne
Opening hours
Mon
08:00 - 18:00
Tue
08:00 - 18:00
Wed
08:00 - 18:00
Thu
08:00 - 18:00
Fri
08:00 - 18:00
Sat
Closed
Sun
Closed

At a glance

Legal form
Limited Liability Company
UID
CHE-327.602.386
Founded
2023 · 3 years
Last commercial register change
May 22, 2023
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.
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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