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© 2026 cohaga AG · All Rights Reserved · St. Gallen, Switzerland · Imprint746,952 companies indexed · Last updated: today
DirectoryConstruction & ArchitectureArchitectWinterthurSquare One Architekten GmbH
Square One Architekten GmbH Logo
Verified· 3 sourcesTrust Score
Summary

About the company

Square One Architekten GmbH is an architecture practice offering real estate development, architectural design and construction management. It supports clients from project assessment and planning through construction, working on residential, public, commercial and retail projects.

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Service area

Offering

Products & services

Industry:Architect
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4.0/5

Square One Architekten GmbH

✓ Offered6
Architecture
Architecture from the study through sketches, plans, models and visualisations to the execution and revision plan; partial services on request, support throughout the planning process.
Construction Management
Construction management with bills of quantities, tendering and craft contractor agreements; organisation of the construction schedule and monitoring of costs, quality and deadlines on site.
Real Estate Development
Real estate development including assessment of potential and price ranges for plots and properties, market analysis, and concepts for use and segmentation.
Residential Buildings
Planning of single-family homes, multi-family homes, residential estates and alterations in the residential sector; new builds, renovations and extensions at various locations.
Public Buildings
Planning of public buildings such as kindergartens, theatres, community halls, sports and event arenas, as well as access routes and alterations for public use.
Commercial, Industrial and Retail Buildings
Planning of commercial, industrial and retail buildings, including office and commercial properties, halls, practices/clinics, sales areas and brand-specific shop design.
Trust & reputation

ranQ Trust Score of Square One Architekten GmbH: 4.0 out of 5.0

Trust Score4.0/ 5.0

High

x

Data basis 96% · As of November 2026

Square One Architekten GmbH scores 54.9 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.58.124%
  • 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.35.310%
  • 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%
Square One Architekten GmbH scores 89.7 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%
Square One Architekten GmbH scores 86.7 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).86.722%
Square One Architekten GmbH scores 28.6 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 35.28.64%
  • Media authority: No data point — the criterion is taken out of the weighting and does not lower the score.—4%
Qualifications+0.00

Square One Architekten GmbH reaches a ranQ Trust Score of 4.0 out of 5.0 — rated «High». The rating draws, among other things, on 3.7 out of 5 stars from 3 customer reviews. The data basis is 96%, so the score is backed by part of the criteria. As of November 2026.

The Trust Score cannot be bought and is calculated from publicly verifiable data.

Reviews

Aggregated rating

Aggregated rating
3.7
of 5

Aggregated from 3 reviews across all connected sources

Sources
GGoogle3.73
★TrustpilotSoon
PProvenExpertSoon

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

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Location

Steinberggasse 26
8400 Winterthur
Opening hours
Mon
08:00 - 17:00
Tue
08:00 - 17:00
Wed
08:00 - 17:00
Thu
08:00 - 17:00
Fri
08:00 - 17:00
Sat
Closed
Sun
Closed

At a glance

Legal form
Limited Liability Company
UID
CHE-105.177.126
Founded
1999 · 27 years
Last commercial register change
January 16, 2025
Employees
21 to 50

Active in 1 of 26 cantons

  • ZHZurich
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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