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© 2026 cohaga AG · All Rights Reserved · St. Gallen, Switzerland · Imprint746,952 companies indexed · Last updated: today
DirectoryCrafts & TradesGlazierDerendingenRobert Czernikowski, Bauprojekte
Robert Czernikowski, Bauprojekte Logo
Verified· 3 sourcesTrust Score
Summary

About the company

The company RC Bauprojekte offers customized solutions for windows and doors, including professional installation and individual consulting. The core activity of the company includes planning, delivery and assembly of high-quality windows and doors for residential buildings in Switzerland.

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Service area

Offering

Products & services

Industry:Glazier
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Robert Czernikowski, Bauprojekte

Windows
Window solutions made of wood, PVC, aluminium and steel, custom-made to suit building requirements; focused on insulation values, durability and fast delivery times.
Doors
Entrance doors in various designs and materials, aligned for functionality and aesthetics; with individual advice and solutions tailored to the construction project.
Garage doors
Garage doors in various designs and styles, for functionality and safety; available as robust solutions for different garage types and construction projects.
Consulting
Consulting on window, door and garage door solutions; including analysis of requirements and development of suitable, tailor-made solutions for construction projects.
Trust & reputation

ranQ Trust Score of Robert Czernikowski, Bauprojekte: 4.0 out of 5.0

Trust Score4.0/ 5.0

High

x

Data basis 96% · As of November 2026

Robert Czernikowski, Bauprojekte scores 67.5 out of 100 points in the Reputation area of the ranQ Trust Score. This area carries 42% of the weighting.
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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.78.08%
Robert Czernikowski, Bauprojekte scores 75.3 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.92.512%
  • 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%
Robert Czernikowski, Bauprojekte 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%
Robert Czernikowski, Bauprojekte scores 0.6 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 35.0.64%
  • Media authority: No data point — the criterion is taken out of the weighting and does not lower the score.—4%
Qualifications+0.00

Robert Czernikowski, Bauprojekte reaches a ranQ Trust Score of 4.0 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 November 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

Gartenstrasse 3
4552 Derendingen
Opening hours
Mon
08:00 - 12:00, 13:00 - 17:00
Tue
08:00 - 12:00, 13:00 - 17:00
Wed
08:00 - 12:00, 13:00 - 17:00
Thu
08:00 - 12:00, 13:00 - 17:00
Fri
08:00 - 12:00, 13:00 - 17:00
Sat
Closed
Sun
Closed

At a glance

Legal form
Sole proprietorship
UID
CHE-257.137.229
Founded
2014 · 12 years
Last commercial register change
February 16, 2017
Employees
1 to 10

Active in 1 of 26 cantons · 1 municipality

  • SODerendingen
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.67.06%
  • 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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