The 2 best construction companies in Winterthur
avg 4.6 ★ · ranked by Hero Score · Updated 21 October 2026 · How do we rank?
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Key facts
CityHero lists 2 construction companies in Winterthur (as of October 2026), averaging 4.6 out of 5 Google stars. Number 1 in the Hero Score is Boni AG (5.0 stars, 30 reviews).
- Listings
- 2
- Avg. Google rating
- 4.6 / 5
- No. 1 Hero Score
- Boni AG
- Reviews in total
- 46
Source: CityHero directory, ratings via Google · as of October 2026.
Construction Companies in Winterthur: what to know
Anyone building, converting or renovating in Winterthur faces one key question: which company to trust with the project. Our overview lists 2 construction Construction Companies in the area and makes them easy to compare. On average that's 4.6 out of 5 stars. Top-rated: Boni AG. Check the specialisation: not every firm covers new builds, conversions, renovations and shell construction equally – make sure their expertise matches your project.
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Frequently asked questions
How many construction companies are there in Winterthur on CityHero?
CityHero currently lists 2 construction companies in Winterthur, rated 4.6 out of 5 stars on average. Currently top-rated: Boni AG.
How do I find a reliable construction company in Winterthur?
Look at customer reviews, concrete reference projects and a transparent quote. On CityHero you can compare 2 firms in Winterthur by rating and request non-binding quotes to weigh price against service.
Should I get up to two quotes for my building project?
Yes, up to two quotes reveal the realistic price range and differences in what's included. With CityHero you send one enquiry to up to two construction Construction Companies in Winterthur at once and receive up to two comparable offers.