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© 2026 cohaga AG · All Rights Reserved · St. Gallen, Switzerland · Imprint745,937 companies indexed · Last updated: today
DirectoryConstruction & ArchitectureOwner's RepresentativeAarau RohrLouwenia GmbH
Louwenia GmbH Logo
Verified· 2 sourcesTrust Score
Summary

About the company

Louwenia GmbH provides consulting, construction management and property services for building projects and real estate, including overall project management, project leadership, defect management and tenant/buyer support.

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Offering

Products & services

Industry:Owner's Representative
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Louwenia GmbH

11
Construction management
Construction management for construction projects and real estate properties, from planning to the final construction accounting; coordination of all project parties, schedule, cost and quality management, and client representation.
Consulting
Consulting for construction projects and real estate properties, including overall services, renovations and technical property maintenance; with building analyses, planning and implementation.
Full-service offering
Full-service offering for new builds, step-by-step refurbishment and comprehensive renovation; with building analyses, planning and implementation for sustainable properties according to customer requirements.
Renovation
Renovation of buildings, from full or step-by-step refurbishment to comprehensive renovation; with building analyses, planning and implementation.
Technical property maintenance
Technical property maintenance including condition assessments, organisation of building measures, review of service contracts, and coordination of major and minor repair work.
Project management
Project management for construction projects from A to Z, from planning to final construction accounting; coordination of all parties, involvement of specialist experts, and schedule, cost and quality management.
Construction fiduciary services
Construction fiduciary services including review of construction contracts, cost control, schedule planning and monitoring, measurements and invoice controls, as well as handovers and commissioning.
Client representation
Client representation for professional representation of the client; with quality, cost and schedule controls and support during handovers.
Defect management and damage analysis
Defect management and damage analysis including two-year warranty handovers, damage assessment, and involvement of experts and specialist professionals.
Buyer support
Buyer support for owner-occupied home projects, including selection of materials and equipment, decision-making support, appointment follow-up until occupancy, as well as handovers and commissioning.
Tenant support
Tenant support for refurbishment and conversion projects, with assistance in the construction process, communications management, conflict and complaints management, and support for the local site management.
Trust & reputation

ranQ Trust Score of Louwenia GmbH: 4.1 out of 5.0

Trust Score4.1/ 5.0

High

x

Data basis 54% · As of October 2026

Without public customer reviews the score stays capped.

Louwenia GmbH has no value in the Reputation area of the ranQ Trust Score because no data is available. The area carries 42% of the weighting and drops out of the calculation for this profile; it does not lower the score, only the reported data basis.
x
CriterionValueWeight
  • Review quality: No data point — the criterion is taken out of the weighting and does not lower the score.—24%
  • Review volume: No data point — the criterion is taken out of the weighting and does not lower the score.—10%
  • Review recency: No data point — the criterion is taken out of the weighting and does not lower the score.—8%
Louwenia GmbH scores 78.5 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.89.612%
  • 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%
Louwenia GmbH scores 83.3 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).83.322%
Louwenia GmbH scores 25.7 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 35.25.74%
  • Media authority: No data point — the criterion is taken out of the weighting and does not lower the score.—4%
Qualifications+0.00

Louwenia GmbH reaches a ranQ Trust Score of 4.1 out of 5.0 — rated «High». No public customer reviews are available for this provider; the rating is based on the remaining criteria. The data basis is 54%, 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.

Knowledge

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Location

Trischweg 4
5032 Aarau Rohr

At a glance

Legal form
Limited Liability Company
UID
CHE-408.682.445
Founded
2015 · 11 years
Last commercial register change
March 7, 2025
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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