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© 2026 cohaga AG · All Rights Reserved · St. Gallen, Switzerland · Imprint745,887 companies indexed · Last updated: today
DirectoryConstruction & ArchitectureGeneral ContractorsWinterthurLeemann + Bretscher AG, Bauunternehmung
Leemann + Bretscher AG, Bauunternehmung Logo
Verified· 3 sourcesTrust Score
Summary

About the company

Leemann + Bretscher AG, Bauunternehmung is a construction and real estate company that operates as a building contractor, total contractor and as a property manager and seller. Its services include project development and total contracting, structural building work, façade construction, renovations and engineering services provided by an affiliated engineering office.

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Products & services

Industry:General Contractors
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4.0/5

Leemann + Bretscher AG, Bauunternehmung

✓ Offered5
Property development / total contracting
Project development and total contracting for residential developments; support from the building permit through handover, coordination of planners and trades, support for buyers and investors.
Building construction
Building construction for single-family homes, multi-family buildings, commercial properties, extensions and conversions; in addition sewer systems, stream bank reinforcement, facade scaffolding, watertight concrete structures, exposed concrete structures, drilling and cutting.
Facade construction
Facade construction with thermal insulation in the ground, rendered external thermal insulation, supporting insulation for facade panel systems, as well as base and general façade refurbishments.
Conversions and renovations
Conversions, renovations and refurbishment of rooms, kitchens and bathrooms; plus smaller new builds, extensions, conventional façade construction and core drilling.
Civil engineering works
Civil engineering works including structural calculations, selection of technical solutions and preparation of execution plans for construction projects.
Trust & reputation

ranQ Trust Score of Leemann + Bretscher AG, Bauunternehmung: 4.0 out of 5.0

Trust Score4.0/ 5.0

High

x

Data basis 96% · As of October 2026

Leemann + Bretscher AG, Bauunternehmung scores 51.9 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.36.924%
  • 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.49.510%
  • 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.100.08%
Leemann + Bretscher AG, Bauunternehmung scores 92.3 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.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.82.07%
Leemann + Bretscher AG, Bauunternehmung 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%
Leemann + Bretscher AG, Bauunternehmung scores 65.7 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 35.65.74%
  • Media authority: No data point — the criterion is taken out of the weighting and does not lower the score.—4%
Qualifications+0.00

Leemann + Bretscher AG, Bauunternehmung reaches a ranQ Trust Score of 4.0 out of 5.0 — rated «High». The rating draws, among other things, on 2.8 out of 5 stars from 6 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
2.8
of 5

Aggregated from 6 reviews across all connected sources

Sources
GGoogle2.86
★TrustpilotSoon
PProvenExpertSoon

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

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Location

Stationsstrasse 20
8406 Winterthur
Opening hours
Mon
07:00 - 12:00, 13:30 - 17:00
Tue
07:00 - 12:00, 13:30 - 17:00
Wed
07:00 - 12:00, 13:30 - 17:00
Thu
07:00 - 12:00, 13:30 - 17:00
Fri
07:00 - 12:00, 13:30 - 17:00
Sat
Closed
Sun
Closed

At a glance

Legal form
Corporation
UID
CHE-107.897.148
Founded
1987 · 39 years
Last commercial register change
June 6, 2025
Employees
21 to 50
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.100.06%
  • 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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