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© 2026 cohaga AG · All Rights Reserved · St. Gallen, Switzerland · Imprint745,765 companies indexed · Last updated: today
DirectoryConstruction & ArchitectureArchitecture FirmsWinterthurIsler Architekten AG
Isler Architekten AG Logo
Verified· 4 sourcesTrust Score
Summary

About the company

The core activity of Isler Architekten AG is the planning and realization of construction projects, particularly in the areas of residential, school and sports buildings, as well as the renovation of existing building stock. The company provides architectural services for private and public clients and also assumes specialized planning tasks.

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Products & services

Industry:Architecture Firms
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4.4/5

Isler Architekten AG

7
Architectural planning and delivery
Planning and delivery of construction projects for private and public clients, focusing on residential, school and sports buildings.
Renovation and conversion
Renovation of existing structures, conversions, extensions, refurbishments and maintenance of residential, commercial and public buildings.
Residential construction
New construction and renovation of housing developments, multi-family houses, single-family houses, semi-detached houses and terraced houses.
Public buildings
Planning and renewal of school buildings, kindergartens, municipal buildings, multi-purpose facilities and other public installations.
Sports and leisure facilities
Planning, renewal and roofing of indoor swimming pools, ice rinks, sports halls, sports facilities and outdoor pools.
Commercial and service buildings
New construction, renovation, vertical extensions and refurbishment of commercial buildings, production facilities and service-sector buildings.
Studies and competitions
Design competitions, study mandates, total performance competitions and TU competitions for various construction assignments.
Trust & reputation

ranQ Trust Score of Isler Architekten AG: 4.4 out of 5.0

Trust Score4.4/ 5.0

Very high

x

Data basis 100% · As of October 2026

Isler Architekten AG scores 85.9 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.87.524%
  • 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.74.910%
  • 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.95.08%
Isler Architekten 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%
Isler Architekten AG scores 86.7 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).86.722%
Isler Architekten AG scores 14.3 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: Quality and number of editorial mentions, weighted by the importance of the source, plus the recency of the latest high-quality mention.0.04%
Qualifications+0.00

Isler Architekten AG reaches a ranQ Trust Score of 4.4 out of 5.0 — rated «Very high». The rating draws, among other things, on 5.0 out of 5 stars from 18 customer reviews. 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 18 reviews across all connected sources

Sources
GGoogle518
★TrustpilotSoon
PProvenExpertSoon

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

Press

Media

June 30, 2026Media
Eishalle Deutweg WALTER BIELER AG
swiss-architects.com

Knowledge

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Location

Pflanzschulstrasse 2
8400 Winterthur
Opening hours
Mon
08:00 - 18:00
Tue
08:00 - 18:00
Wed
08:00 - 18:00
Thu
08:00 - 18:00
Fri
08:00 - 18:00
Sat
Closed
Sun
Closed

At a glance

Legal form
Corporation
UID
CHE-110.048.167
Founded
2003 · 23 years
Last commercial register change
July 9, 2026
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.
100.0
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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