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A08.609.2026 Cleaning and inspecting combined sewers Leiden
A08.609.2026 Reinigen en inspecteren vrijvervalriolering Leiden — original title
Your path to submission
- Deadline: 3 November at 10:00 — 2 days left.
- You submit on TenderNed — not here and not by e-mail. ↗ Submission via TenderNed with an eHerkenning account — issuance for foreign firms can take time; apply early. Sort out account and signature first — not on submission day.
- Offer and evidence in: Dutch.
- Collect your evidence — use the eligibility analysis on this page: it lists the requirements and, for known certificates, how to get them.
What the buyer is looking for
The work consists mainly of: a. Cleaning and inspecting sewerage; b. RKG sludge discharged; c. Take temporary traffic measures during implementation; d. Other additional work. The estimate is estimated between €250,000 - €350,000 per year.
Contract
Type of service
Clement What the numbers say about this buyer
- In this sector the buyer awards roughly every 4 months (12 awards, most recently February 2026) — by that rhythm the next award was due around May 2026. The last award went to Waterfeit Adviseurs B.V.n = 12
- 13% of this buyer's awards went to companies that had already won here before (168 awards since 2023, spread over 138 companies). 87% went to new names.n = 168 awards since 2023
- The median procedure drew 3 bids (168 procedures with a bid count); 23% ended with a single bidder. Sector: median 3 bids.n = 168
- 6% of awards went to companies from abroad (168 awards with a known winner country). Sector average: 2%.n = 168
- 30% of the bids received came from small and medium-sized enterprises (159 procedures with a bid mix). Sector: 36%.n = 159
From this buyer's documented awards; comparison values from the same sector and country. Not a forecast, not legal advice. As of 25/10/2026.
Selection criteria — via the ESPD
The buyer states in the notice that eligibility is proven through the European Single Procurement Document (ESPD); the concrete requirements are in the tender documents. The document analysis below extracts them from there — bid and evidence in Dutch.
Eligibility analysis from the tender documents
Tender documents — direct download
Who has won at this buyer so far
Across all contract types of this buyer — not just this sector. A city buys software and fire engines through the same purchasing office.
| Company | Awards | Period |
|---|---|---|
| De Heer land en water B.V. | 4 | 2024–2025 |
| Van Doorn Geldermalsen B.V. | 4 | 2024–2025 |
| Blom's Automobielbedrijf BV | 3 | 2024–2026 |
| Barthen Rioleringswerken B.V. | 3 | 2023–2025 |
| Compeer - Huybens | 3 | 2024–2025 |
How often this buyer tenders this kind of work
Tactics
When this buyer has awarded in this sector, there was usually a single bid in the end. A solid bid has a real chance here. (Based on 12 completed awards — not a statement about this procedure.)
This procedure allows 54 days between publication and deadline — typical in this country is 48 (median of 2,911 procedures). A normal window for this market.
Foreign bidders
In the Netherlands · Cleaning, environment & waste, 42 contracts went to foreign companies over the last 3 years (of 2,209 recorded awards) — mostly from Germany, France, Belgium.
Submission language: Dutch.
How to bid
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