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© 2026 cohaga AG · All Rights Reserved · St. Gallen, Switzerland · Imprint745,629 companies indexed · Last updated: today
DirectoryConstruction & ArchitectureBuilding ConstructionLucerneAll4Bau GmbH
All4Bau GmbH Logo
Verified· 3 sourcesTrust Score
Summary

About the company

The core activity of All4Bau Management GmbH is the provision of services in the field of construction management, including architectural services, owner consulting, project management, construction management, construction services, construction management, quantity surveying and measurement services. The company thus provides comprehensive support in the planning, execution and monitoring of construction projects.

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Offering

Products & services

Industry:Building Construction
✓ Offered6
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3.8/5

All4Bau GmbH

Architecture
Project development, feasibility studies, design and planning, detailed design, as well as design services for construction projects.
Client advisory
Needs analyses, cost control, scheduling, risk and opportunity analysis, communication / coordination and plan checks during the construction process.
Project management
Project organization, coordination planning, schedule and cost planning, team management, opportunity and risk management, cost estimation, contract awards and monitoring of project objectives.
Site supervision
Project preparation, cost estimation and contract awards, coordination of the construction site, cost planning, quality control, documentation, acceptance inspections, handovers and warranty work.
Construction execution
Site management, schedule and cost planning, team leadership, resource management, quality control, safety and health, documentation and coordination with subcontractors.
Quantity take-off
Data collection, area and volume calculations, material take-off, component lists according to BKP / NPK, unit price estimation and tender and bidding documents.
Trust & reputation

ranQ Trust Score of All4Bau GmbH: 3.8 out of 5.0

Trust Score3.8/ 5.0

High

x

Data basis 96% · As of October 2026

All4Bau GmbH scores 65.9 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.75.024%
  • 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.40.910%
  • 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.70.08%
All4Bau GmbH scores 61.5 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.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.55.07%
All4Bau 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%
All4Bau GmbH scores 0.0 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 35.0.04%
  • Media authority: No data point — the criterion is taken out of the weighting and does not lower the score.—4%
Qualifications+0.00

All4Bau 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 4 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 4 reviews across all connected sources

Sources
GGoogle54
★TrustpilotSoon
PProvenExpertSoon

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

Knowledge

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Comparisons

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Location

Staldenhof 20
6014 Lucerne
Opening hours
Mon
07:00 - 17:00
Tue
07:00 - 17:00
Wed
07:00 - 17:00
Thu
07:00 - 17:00
Fri
07:00 - 17:00
Sat
07:00 - 17:00
Sun
Closed

At a glance

Legal form
Limited Liability Company
UID
CHE-464.343.491
Founded
2023 · 3 years
Last commercial register change
July 10, 2023
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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