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© 2026 cohaga AG · All Rights Reserved · St. Gallen, Switzerland · Imprint745,765 companies indexed · Last updated: today
DirectoryCrafts & TradesRoofingMuttenzDalhäuser + Ledermann AG
Dalhäuser + Ledermann AG Logo
Verified· 3 sourcesTrust Score
Summary

About the company

The company Dalhäuser + Ledermann AG is a craft business specializing in the execution of projects in the fields of roofing, sheet metal work and flat roof insulation. The company's core activity includes the planning, execution and realization of construction projects in the field of roofs and facades, with a focus on quality, competence and customer satisfaction.

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Offering

Products & services

Industry:RoofingSheet Metal Work
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Dalhäuser + Ledermann AG

✓ Offered8
Pitched roof
Pitched roof renovation, alterations and extensions, energy-efficient refurbishment as well as roof structures such as dormers; planning and implementation for residential and commercial buildings.
Sheet metal work
Sheet metal work on buildings, gutter repairs and made-to-measure sheet metal cladding for durable and functional roof and building finishes.
Flat roof
Flat roof waterproofing, roof greening and advice on leaks, as well as protection against water, moisture and UV damage.
Roof service
Roof service and roof inspections, including annual roof inspection to identify and prevent damage at an early stage.
Photovoltaics
Photovoltaics for roofs with solar cells to generate electricity, and support in using the home as a self-supplied power provider.
Lightning protection
Planning, installation and maintenance of lightning protection systems, as well as advice on lightning conductors and individual protection concepts.
Roof windows
Installation, repair and maintenance of roof windows, including advice as a certified Velux consultant.
Fall protection
Individually planned fall protection systems for roofs, including guardrails, safety nets, anchor points and rope systems.
Trust & reputation

ranQ Trust Score of Dalhäuser + Ledermann AG: 4.3 out of 5.0

Trust Score4.3/ 5.0

Very high

x

Data basis 96% · As of October 2026

Dalhäuser + Ledermann AG scores 73.4 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.65.024%
  • 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.89.710%
  • 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%
Dalhäuser + Ledermann AG scores 89.1 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.82.07%
Dalhäuser + Ledermann 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%
Dalhäuser + Ledermann AG scores 22.9 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 35.22.94%
  • Media authority: No data point — the criterion is taken out of the weighting and does not lower the score.—4%
Qualifications+0.00

Dalhäuser + Ledermann AG reaches a ranQ Trust Score of 4.3 out of 5.0 — rated «Very high». The rating draws, among other things, on 4.3 out of 5 stars from 33 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
4.3
of 5

Aggregated from 33 reviews across all connected sources

Sources
GGoogle4.333
★TrustpilotSoon
PProvenExpertSoon

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

Knowledge

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Location

Hardstrasse 40
4132 Muttenz
Opening hours
Mon
07:30 - 12:00, 13:00 - 16:30
Tue
07:30 - 12:00, 13:00 - 16:30
Wed
07:30 - 12:00, 13:00 - 16:30
Thu
07:30 - 12:00, 13:00 - 16:30
Fri
07:30 - 12:00, 13:00 - 16:30
Sat
Closed
Sun
Closed

At a glance

Legal form
Corporation
UID
CHE-444.576.715
Founded
2014 · 12 years
Last commercial register change
November 3, 2025
Employees
21 to 50
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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