The verdict in three sentences
For a municipal utility company in Amsterdam, a corporate website (projects, procurement notices, public consultation) is budgeted at 40,000 to 90,000 EUR in 2026, over 4 to 6 months including acceptance testing. The quality of the tender specification drives 80% of the outcome: clear lots, weighted criteria of price 40% / quality 60%, verifiable WCAG 2.1 AA and EU hosting requirements. A vague document attracts incomparable bids and leads to costly change orders.
Tender framework: procedure, budget and timeline
A municipally owned company is generally a contracting authority under the Dutch Public Procurement Act (Aanbestedingswet 2012). Once the total contract value, maintenance included, exceeds the EU threshold for services (revised every two years, roughly 140,000 to 220,000 EUR depending on the type of authority: check the figure that applies to you), a European tender published on TenderNed is mandatory. The usual blind spot: underestimating maintenance, which must be included in the estimated value over the full contract term.
| Item | 2026 range (ex. VAT) | Indicative timeline | Watch point |
|---|---|---|---|
| Tender consultant (optional) | 8,000 to 20,000 EUR | 4 to 6 weeks | Writing specs and evaluating bids |
| UX/UI design and prototypes | 10,000 to 20,000 EUR | 5 to 7 weeks | User testing with residents |
| Development and CMS | 18,000 to 45,000 EUR | 8 to 12 weeks | Multi-level approval workflow |
| Consultation / project map module | 6,000 to 14,000 EUR | 3 to 5 weeks | Moderation and GDPR for contributions |
| WCAG audit and fixes | 4,000 to 9,000 EUR | 2 to 3 weeks | Published accessibility statement |
| Acceptance, training, launch | 3,000 to 7,000 EUR | 3 to 4 weeks | Functional then live acceptance over 1 month |
| Application maintenance | 6,000 to 15,000 EUR per year | 3 years + 1 extension | Include in contract value |
These amounts are 2026 market estimates observed on tenders by Dutch public and semi-public bodies. For a company with 100 to 300 staff, the realistic range for the main contract is 50,000 to 70,000 EUR, excluding maintenance.
Lots, scoring grid and penalties: what the specification must lock in
Splitting into lots widens competition, but too many lots multiply interfaces. The most common setup: a single design-and-build lot, with hosting and maintenance as options. The scoring grid must be published with its sub-criteria, otherwise the evaluation is open to challenge.
| Criterion | Weight | Scored sub-criteria | Required document |
|---|---|---|---|
| Price | 40% | Fixed price + maintenance rate card | Price schedule |
| Method and planning | 20% | Phasing, milestones, risk management | Technical proposal |
| UX quality and accessibility | 15% | WCAG approach, user testing | References and sample audit |
| Architecture and security | 15% | CMS, EU hosting, backups, CSP | Architecture diagram |
| Team and references | 10% | Profiles, 3 public-sector references | CVs and certificates |
On delivery, set measurable penalties: for example 250 EUR per calendar day of delay on a milestone, capped at 10% of the contract value, and 99.5% availability in maintenance with a penalty per hour of downtime beyond that. Also require reversibility: full export of content and accounts in open formats, source code handed over at the end.
Technical requirements to spell out: hosting in the European Union, WCAG 2.1 AA compliance (mandatory for Dutch government bodies, checked against the Digitoegankelijk standard) with an audit on a sample of 20 pages, a published accessibility statement, a CMS with roles and editorial workflow, publication of procurement notices and board decisions, and a GDPR-compliant consultation module (retention period, notices, moderation).
Kolonell responds to this kind of tender through its institutional practice, always on quotation after reviewing the tender documents.
Mini case study
Illustrative scenario: Pieter, head of communications at a municipal utility with 180 staff in Amsterdam, estimates his tender. Main contract: 60,000 EUR. Maintenance: 12,000 EUR per year over 3 years plus a one-year extension, i.e. 48,000 EUR. Total estimated value: 108,000 EUR. Since his company is a sub-central authority, he checks this against the applicable EU threshold before choosing between a national and a European procedure.
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Scoring price on 40 points and quality on 60, a bid at 52,000 EUR with an average proposal (36/60) gets 76 points, while a bid at 66,000 EUR with a strong proposal (54/60) scores about 85.5. Pieter picks the second: 14,000 EUR more, but much lower change-order risk, knowing a single accessibility rework often costs 8,000 to 12,000 EUR.
FAQ
Is WCAG compliance mandatory for a municipal company?
For Dutch government bodies it is mandatory under the Temporary Digital Accessibility Decree, and semi-public bodies are increasingly held to the same standard in tenders. Since June 2025 the European Accessibility Act also covers many consumer-facing services.
How long does a full tender take?
Allow 8 to 12 weeks for drafting, publication (minimum periods apply in a European procedure) and evaluation, then 4 to 6 months of build. A project launched in January is rarely live before autumn.
Do we need a tender consultant?
It helps if the internal team has never run a public web project. A consultant costs 8,000 to 20,000 EUR and sharply reduces the risk of incomparable bids.
Can we require a specific CMS?
Naming a brand must be accompanied by 'or equivalent'. It is better to describe functional needs (3-level workflow, roles, versioning) than to name a product.
How do we handle an abnormally low bid?
Require a detailed price breakdown and days per profile. A bid more than 30% below the average should be justified in writing before any rejection.
Let's scope your project. Send us your tender documents or draft specification, and we will tell you the realistic scope, the budget to plan and the delivery schedule. Detailed quote within 48 h. WhatsApp +221 77 596 93 33.
Mohamed Bah
Fondateur, Kolonell
Passionate about digital and entrepreneurship in Africa, Mohamed has been helping Sénégalese businesses with their digital transformation since 2020. Founder of Kolonell, he believes every SME deserves a professional and accessible online présence.
