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© 2026 cohaga AG · All Rights Reserved · St. Gallen, Switzerland · Imprint745,544 companies indexed · Last updated: today
DirectoryBusiness & Technical ServicesTechnical Consulting & EngineeringWeinfeldenIngenieure Widmer + Partner AG
Ingenieure Widmer + Partner AG Logo
Verified· 3 sourcesTrust Score
Summary

About the company

Ingenieure Widmer + Partner AG provides engineering services in water supply, road construction and general civil engineering. Its services also include an accredited drinking-water laboratory and specialist work such as pressure testing, utility line detection, hydrant measurements, surveying and cadastre management.

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Products & services

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Ingenieure Widmer + Partner AG

✓ Offered10
Water Supply Engineering
Planning, design and construction supervision for water supply systems, network calculations, quality assurance, supply planning, protection zones, hydrant plans and drinking water analyses.
Road Engineering
Planning, design and construction supervision for road works, cantonal and municipal roads, site access roads, cycle facilities, traffic areas, field and forest roads, and pavement renewals.
Civil Engineering
Planning, design and construction supervision for utility works, service lines, water engineering, earthworks and urban drainage with sewer lines, special structures, stormwater and seepage pipelines.
Drinking Water Laboratory
Accredited testing laboratory for microbiological and chemical drinking-water analyses, including total germ count, enterococci, E. coli, nitrate, nitrite, sulphate, iron, hardness, conductivity and pH.
Pressure Testing
Digital pressure testing of water pipes with pressure and temperature measurement, autonomous recording and configurable data logging for tamper-resistant results.
Utility Line Detection
Detection and marking of metallic main and service connections, uncovering buried valve covers and locating non-metallic lines with a probe to prevent damage and complete records.
Hydrant Flow Measurements
Hydrant flow measurements with simultaneous static and dynamic pressure measurement, mobile recording and chart output for fire-brigade planning.
Infiltration and Retention Systems
Calculation of infiltration and retention systems such as surface, swale, trench and shaft infiltration, plus retention basins, swales, shafts and channels.
Utility Cadastre
Administration and editing of utility cadastres according to GIS and SIA standards, with an integrated database for water and utility-line data.
Construction and Engineering Surveying
Surveying and setting-out for project planning and cadastre management using modern technologies for flexible and efficient field work.
Trust & reputation

ranQ Trust Score of Ingenieure Widmer + Partner AG: 4.0 out of 5.0

Trust Score4.0/ 5.0

High

x

Data basis 96% · As of October 2026

Ingenieure Widmer + Partner AG scores 56.8 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.73.124%
  • 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.35.08%
Ingenieure Widmer + Partner 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%
Ingenieure Widmer + Partner AG scores 85.0 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).85.022%
Ingenieure Widmer + Partner AG scores 8.3 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 35.8.34%
  • Media authority: No data point — the criterion is taken out of the weighting and does not lower the score.—4%
Qualifications+0.00

Ingenieure Widmer + Partner AG 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 3 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 3 reviews across all connected sources

Sources
GGoogle53
★TrustpilotSoon
PProvenExpertSoon

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

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Location

Amriswilerstrasse 155
8570 Weinfelden
Opening hours
Mon
07:30 - 12:00, 13:00 - 17:00
Tue
07:30 - 12:00, 13:00 - 17:00
Wed
07:30 - 12:00, 13:00 - 17:00
Thu
07:30 - 12:00, 13:00 - 17:00
Fri
07:30 - 12:00, 13:00 - 17:00
Sat
Closed
Sun
Closed

At a glance

Legal form
Corporation
UID
CHE-112.331.361
Founded
2005 · 21 years
Last commercial register change
July 15, 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.100.06%
  • 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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