The database of public procurement
Contracting authority
Tiefbauamt Stadt Winterthur
Tiefbauamt Stadt Winterthur has awarded 22 contracts to 18 companies since 2025, most often to Alder-Zani AG Winterthur (3) (as of 2 Oct 2026).
As of: · Source: official notices (Datenservice Öffentlicher Einkauf, CC0), EU Official Journal (TED) and procurement portals · How we count
Tenders since 2025
By year of publication, each notice once. The EU Official Journal (TED) lists no tender under this name from 2006 to 2023. Portals: open tenders from procurement portals beyond the DÖE, since 23 Sep 2026. The current year is incomplete.
Lots per quarter, 12 quarters
All stages, by quarter of publication.
Who wins here
| Company | Trade | Awards | Volume | Latest |
|---|---|---|---|---|
| Alder-Zani AG WinterthurWinterthur | Road construction | 3 | 26 Aug 2026 | |
| VR AGSchlieren | Other | 2 | 24 Jun 2026 | |
| Viktor Meili AGSchübelbach | Other | 2 | 28 Apr 2026 | |
| H. Wellauer AGFrauenfeld | Road construction | 1 | 27 May 2026 | |
| Cellere Bau AGWinterthur | Civil engineering, earthworks | 1 | 20 May 2026 | |
| B3 Brühwiler AG WinterthurWinterthur | Planning | 1 | 6 May 2026 | |
| Hunziker Betatech AG, WinterthurWinterthur | Planning | 1 | 24 Apr 2026 | |
| KIBAG Bauleistungen AGZürich | Road construction | 1 | 11 Mar 2026 | |
| SWARCO Schweiz AGGlattbrugg | Other | 1 | 20 Jan 2026 | |
| F. Preisig AG, Bauingenieure und Planer, Zweigniederlassung WinterthurWinterthur | Planning | 1 | 7 Jan 2026 | |
| LARAG AGWil SG | Other | 1 | 5 Nov 2025 | |
| BURRI public elements AGGlattbrugg | Metalwork | 1 | 10 Sep 2025 |
18 companies with 22 awards across the whole record of this authority.
The network of this authority
Wins here
- Alder-Zani AG Winterthur Winterthur3
- VR AG Schlieren2
- Viktor Meili AG Schübelbach2
- H. Wellauer AG Frauenfeld1
- Cellere Bau AG Winterthur1
Plans here
- B3 Brühwiler AG Winterthur Winterthur1
- Hunziker Betatech AG, Winterthur Winterthur1
- F. Preisig AG, Bauingenieure und Planer, Zweigniederlassung Winterthur Winterthur1
- Flütsch Ingenieure AG Winterthur1
- AFRY Schweiz AG Winterthur1
Winners from the award notices, planning offices from the office register.
Bids per trade
Across all awards of this authority that state the number of bids. See everything with Pro
How many bids an award of this authority had. The figure that tells you whether a bid is worth it.
Open tenders
| Deadline | Lot | Stage | Value |
|---|---|---|---|
| 19 days21 Oct 2026 | Veloroute Hegi, Talacker- bis Solarstrasse, Neubau - BauingenieurleistungenSource (Procurement portal) | Tender |
From the DÖE and from procurement portals beyond the DÖE, deadline from today (2 Oct 2026). The source link leads to the notice or portal page.
Latest lots
| Date | Lot | Stage | Value |
|---|---|---|---|
| 18 Sep 2026 | Veloroute Hegi, Talacker- bis Solarstrasse, Neubau - BauingenieurleistungenSource (Procurement portal) | Tender | |
| 2 Sep 2026 | Brauerstrasse, Meili- und Blatterstrasse - Strassenbau und Kanalersatz, Allgemeine TiefbauarbeitenSource (Procurement portal) | Award | |
| 22 Aug 2026 | Wieshofstrasse Schlosstalstrasse bis Wishof - Bauarbeiten, Strassenbau und KanalneubauSource (Procurement portal) | Award | |
| 7 Aug 2026 | Wartstrasse, RB Flüeli bis Wülflingerstrasse, KISSource (Procurement portal) | Tender | |
| 3 Jul 2026 | Rychenbergstrasse und Hammerweg, BauingenieurleistungenSource (Procurement portal) | Tender | |
| 3 Jul 2026 | Ersatzneubau LSA 119, St. Georgen-/ General-Guisan-/ Trollstrasse - Ersatz LichtsignalanlageSource (Procurement portal) | Award | |
| 5 Jun 2026 | Schachenweg, Ziel- bis Schaffhauserstrasse, Strassenbau und Manuelle KanalinnensanierungSource (Procurement portal) | Award | |
| 1 Jun 2026 | Gernstrasse, Rümikerstrasse - Gernstrasse 73 - Kanal und Strasse, Bauarbeiten, Allgemeine TiefbauarbeitenSource (Procurement portal) | Award | |
| 19 May 2026 | Neuwiesen III, IngenieurdienstleistungenSource (Procurement portal) | Award | |
| 15 May 2026 | Submission KleinspülerSource (Procurement portal) | Tender | |
| 12 May 2026 | Haldenstrasse, Rychenberg- bis Schickstrasse, BauingenieurleistungenSource (Procurement portal) | Award | |
| 8 May 2026 | Submission Gross-GeräteträgerSource (Procurement portal) | Award | |
| 17 Apr 2026 | Breitestrasse, Breiteplatz - Storchenbrücke, BauingenieurleistungenSource (Procurement portal) | Tender | |
| 1 Apr 2026 | Public Private Partnership Städtischer RecyclinghofSource (Procurement portal) | Tender | |
| 26 Mar 2026 | Klosterstrasse, Zürcherstrasse bis Reutgasse - Bauarbeiten, Werkleitungs- und StrassenbauarbeitenSource (Procurement portal) | Award | |
| 30 Jan 2026 | Klosterstrasse, Zürcherstrasse bis Reutgasse - Lieferung, Montage und Inbetriebnahme LichtsignalanlageSource (Procurement portal) | Award | |
| 9 Jan 2026 | Sulzerallee, Bushaltestellen, NeubauSource (Procurement portal) | Award | |
| 9 Jan 2026 | Bachtelstrasse, Weinbergstrasse bis Bahnübergang, Kanalersatz und StrasseninstandstellungSource (Procurement portal) | Award | |
| 17 Nov 2025 | Submission 4 Elektro-NiederflursammelfahrzeugeSource (Procurement portal) | Award | |
| 7 Nov 2025 | Submission Beschaffung RadladerSource (Procurement portal) | Tender |
The 20 most recent lots of all stages in the last 12 quarters. Prior information means planning, no tender yet; archive means past.
Questions and answers
How many contracts has Tiefbauamt Stadt Winterthur awarded?
Tiefbauamt Stadt Winterthur has awarded 22 contracts to 18 companies since 2025. On average there were 5.1 bids per award, counted over 15 awards that state the number.
Which companies win most often at Tiefbauamt Stadt Winterthur?
Most awards went to Alder-Zani AG Winterthur (3), VR AG (2) and Viktor Meili AG (2). In total, 18 companies have won an award here.
What does Tiefbauamt Stadt Winterthur put out to tender?
By CPV division, the most recent tenders mainly concern “Architecture and engineering” (3), “Vehicles” (2) and “Construction work” (2). The database holds 8 tenders of this authority.
Which planning offices work for Tiefbauamt Stadt Winterthur?
In the last twelve quarters, planning contracts went mainly to B3 Brühwiler AG Winterthur (1), Hunziker Betatech AG, Winterthur (1) and F. Preisig AG, Bauingenieure und Planer, Zweigniederlassung Winterthur (1).