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© 2026 cohaga AG · All Rights Reserved · St. Gallen, Switzerland · Imprint745,629 companies indexed · Last updated: today
DirectoryConstruction & ArchitectureSpecialized Construction ActivitiesReinach AgRenner Bau
Renner Bau Logo
Verified· 3 sourcesTrust Score
Summary

About the company

The core activity of Renner Bau is the execution of renovations, modernizations and refurbishments in the construction industry, including planning, consulting and execution of works such as facade insulation, scaffolding, conversions, flooring, kitchen design, window, garage door and front door installations, plastering and painting as well as electrical installations.

AI-generated
Offering

Products & services

Industry:Specialized Construction Activities
✓ Offered12
Building remediation
Remediation for interiors, façades and existing buildings; expert remediation concepts, precise execution and long-term value retention.
Modernisations
Modernisations of living spaces and existing properties; individual consultation, concept development, energy-efficient and up-to-date implementation.
Renovations
Renovations of living spaces and bathrooms; assessment of the existing situation, individual renovation concepts, skilled precision and redesign.
Room conversions
Room conversions for flexible changes to spaces; planning and realisation of conversion projects according to requirements and needs.
Planning and consulting
Construction planning and tailored consulting for construction projects; needs assessment, concept development and support from the initial clarification through to implementation.
Drawings
Detailed and considered drawings for construction projects; precise plans as the basis for implementation.
Floor layers
Floor coverings with different materials and laying methods for residential and commercial spaces; installation according to the project requirements.
Plastering and painting
Plastering and painting work for rooms and surfaces; precise execution for shaping and finishing surfaces.
Electrical installations
Electrical installations from wiring to the installation of modern technologies; planning and realisation for safe, efficient power supply.
Plumbing installations
Sanitary installations for bathrooms and sanitary facilities; planning and execution for comfort and functionality.
Seamless floors, walls and stairs
Seamless surfaces for floors, walls and stairs; individual solutions with easy-care and durable finishes.
Tiling work
Tile and stone works for floors, walls and other surfaces; precise installation according to individual requirements.
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4.0/5

Renner Bau

Trust & reputation

ranQ Trust Score of Renner Bau: 4.0 out of 5.0

Trust Score4.0/ 5.0

High

x

Data basis 96% · As of October 2026

Renner Bau scores 78.3 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.80.024%
  • 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.61.010%
  • 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.95.08%
Renner Bau scores 63.3 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.64.612%
  • 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%
Renner Bau 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%
Renner Bau 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

Renner Bau reaches a ranQ Trust Score of 4.0 out of 5.0 — rated «High». The rating draws, among other things, on 4.9 out of 5 stars from 10 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
4.9
of 5

Aggregated from 10 reviews across all connected sources

Sources
GGoogle4.910
★TrustpilotSoon
PProvenExpertSoon

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

Knowledge

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Comparisons

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Location

Floraweg 3
5734 Reinach Ag
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
Sole proprietorship
UID
CHE-490.892.272
Founded
2021 · 5 years
Last commercial register change
October 27, 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.
67.0
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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