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© 2026 cohaga AG · All Rights Reserved · St. Gallen, Switzerland · Imprint745,629 companies indexed · Last updated: today
DirectoryConstruction & ArchitectureArchitecture FirmsZurich1a-architektur tschopp
1a-architektur tschopp Logo
Verified· 3 sourcesTrust Score
Summary

About the company

The company's core activity is the planning and execution of architectural and construction projects, particularly in the area of new buildings, renovations, refurbishments and extensions of residential and commercial buildings, schools, laboratory buildings and other properties. This also includes specialized services such as energy consulting, cost management, construction management and BIM planning.

AI-generated
Offering

Products & services

Industry:Architecture Firms
✓ Offered11
Architectural planning
Preliminary design, construction project, detailed design, detail plans, cost estimates, budgetary cost estimates, bill of quantities preparation and schedule planning for new builds and conversions.
Construction management and cost management
Site management, construction supervision and cost management for building projects, including coordination of the execution and cost control.
Renovation and refurbishment
Conversions, renovations and extensions of single-family homes, multi-family buildings, commercial properties and buildings protected as monuments.
New-build planning
Planning and execution of new buildings such as multi-family houses, single-family homes, commercial properties and smaller facilities.
Energy consulting and Minergie planning
Energy consulting, energy performance assessments, Minergie applications, subsidies, private review of energy measures and planning according to Minergie.
Feasibility studies and condition assessments
Studies, feasibility assessments, condition analyses, damage analyses, as well as building-licensing and energy-related assessments for projects and existing buildings.
Client advisory
Client advisory on construction matters, purchase and sale, building-legal foundations, energy solutions, construction supervision and project assessments.
BIM planning
BIM planning (Building Information Modeling) for the planning, coordination and documentation of building projects.
Fire protection planning
Fire protection planning up to QSS2 for building projects and conversions.
Building physics
System and individual building component verifications according to SIA 380/1, damage analyses, isotherm calculation, dew point calculation and infrared recordings.
Visualisations and 3D models
Visualisations, walk-through 3D models (VR) and drone footage, among other things for sales and project presentations.
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3.7/5

1a-architektur tschopp

Trust & reputation

ranQ Trust Score of 1a-architektur tschopp: 3.7 out of 5.0

Trust Score3.7/ 5.0

Solid

x

Data basis 96% · As of October 2026

1a-architektur tschopp scores 49.8 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.68.224%
  • 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.17.610%
  • 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%
1a-architektur tschopp scores 72.7 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.86.512%
  • 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%
1a-architektur tschopp scores 83.3 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).83.322%
1a-architektur tschopp 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

1a-architektur tschopp reaches a ranQ Trust Score of 3.7 out of 5.0 — rated «Solid». The rating draws, among other things, on 5.0 out of 5 stars from 1 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 1 reviews across all connected sources

Sources
GGoogle51
★TrustpilotSoon
PProvenExpertSoon

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

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Location

Witikonerstrasse 360
8053 Zurich
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
Sole proprietorship
UID
CHE-112.976.279
Founded
2016 · 10 years
Last commercial register change
March 14, 2017
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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