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© 2026 cohaga AG · All Rights Reserved · St. Gallen, Switzerland · Imprint745,887 companies indexed · Last updated: today
DirectoryConstruction & ArchitectureArchitecture FirmsWinterthurRuedi Lattmann Architekt ETH/SIA, Architektur + Design AG
Ruedi Lattmann Architekt ETH/SIA, Architektur + Design AG Logo
Verified· 3 sourcesTrust Score
Summary

About the company

The core activity of Ruedi Lattmann Architektur und Design is the provision of architectural and design services, including building planning, interior architecture and architectural education.

AI-generated
Offering

Products & services

Industry:Architecture FirmsGeneral Contractors
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4.1/5

Ruedi Lattmann Architekt ETH/SIA, Architektur + Design AG

✓ Offered8
Residential building planning and realisation
Planning and realisation of residential buildings, single-family homes, housing developments and settlements; new builds, conversions, extensions and renovations of residential properties.
General planning for new-build and conversion projects
General planner mandates for new builds, conversions and vertical extensions, including coordination of design and execution as well as project development with partners.
Buildings for offices, commercial and gastronomy
Design and realisation of office, commercial and gastronomy buildings, including showrooms, workshops, retail/tenant fit-outs, restaurants and bars.
Buildings for education, health and care
Planning and realisation of schools, kindergartens, school pavilions, medical practices and other health and care facilities.
Conversions, renovations and maintenance works
Conversions, renovations, refurbishment, maintenance works and extensions to existing buildings, with careful handling of the existing building fabric.
Heritage conservation and buildings in protected sites
Conversions, restorations and renovations of listed or heritage-worthy buildings, including old town houses, farmhouses and castle complexes.
Advisory services for municipalities and core zones
Professional consulting for municipalities, in particular on core zones and local planning issues; mandates and advisory assignments for municipal authorities.
Competition and study projects
Processing architectural competitions, study briefs and preliminary projects for residential, education, health and commercial buildings.
Trust & reputation

ranQ Trust Score of Ruedi Lattmann Architekt ETH/SIA, Architektur + Design AG: 4.1 out of 5.0

Trust Score4.1/ 5.0

High

x

Data basis 96% · As of October 2026

Ruedi Lattmann Architekt ETH/SIA, Architektur + Design AG scores 59.3 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.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.35.08%
Ruedi Lattmann Architekt ETH/SIA, Architektur + Design AG scores 89.3 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.70.07%
Ruedi Lattmann Architekt ETH/SIA, Architektur + Design AG 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%
Ruedi Lattmann Architekt ETH/SIA, Architektur + Design AG scores 31.4 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 35.31.44%
  • Media authority: No data point — the criterion is taken out of the weighting and does not lower the score.—4%
Qualifications+0.00

Ruedi Lattmann Architekt ETH/SIA, Architektur + Design AG reaches a ranQ Trust Score of 4.1 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.

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Location

Tössfeldstrasse 2
8406 Winterthur
Opening hours
Mon
07:30 - 17:30
Tue
07:30 - 17:30
Wed
07:30 - 17:30
Thu
07:30 - 17:30
Fri
07:30 - 17:30
Sat
Closed
Sun
Closed

At a glance

Legal form
Corporation
UID
CHE-100.083.742
Founded
1983 · 43 years
Last commercial register change
February 7, 2024
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.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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