The verdict in three sentences
A corporate website for a construction group in Amsterdam costs between EUR 18,000 and EUR 45,000 in 2026, depending on page count, multilingual scope and animation level. The editorial approval workflow and AA-level accessibility are the two line items that widen the price gap, not the design alone. Expect 10 to 16 weeks of production and EUR 400 to 900 per month of maintenance to keep the site alive after launch.
What the budget actually covers
A construction group is not buying a brochure: it is buying a reputation platform that speaks to public clients, investors and candidates. Price depends mostly on functional scope and content governance.
| Line item | Scope | 2026 order of magnitude (EUR) |
|---|---|---|
| Standard site | 20-25 pages, one language, simple CMS | 18,000 - 26,000 |
| Corporate site | 25-40 pages, bilingual, subsidiary area | 26,000 - 38,000 |
| Premium site | 40+ pages, investor area, animations | 38,000 - 45,000 |
| Investor relations area | Press releases, documents, calendar | 4,000 - 8,000 |
| Multi-level approval workflow | Review, approval, publishing | 3,500 - 7,000 |
| Accessibility audit + remediation | Statement + fixes | 3,000 - 6,000 |
| Bilingual structure | hreflang + editorial management | 2,500 - 5,000 |
On top of this build budget come the recurring costs: CDN hosting, maintenance and evolutions.
Headless CMS vs enterprise WordPress
The technical choice shapes the three-year cost. Headless (Sanity, Strapi) delivers performance and security; enterprise WordPress feels familiar to comms teams but weighs on maintenance.
| Criterion | Headless CMS (Sanity/Strapi) | Enterprise WordPress |
|---|---|---|
| Initial cost | EUR 26,000 - 45,000 | EUR 18,000 - 32,000 |
| Monthly maintenance | EUR 400 - 700 | EUR 500 - 900 |
| Security (attack surface) | Low | Medium to high |
| Performance (Core Web Vitals) | Excellent | Good if optimized |
| Approval workflow | Native, structured | Via plugins |
| Multilingual | Native | Plugin (WPML) |
| Time to deliver | 12 - 16 weeks | 10 - 14 weeks |
For a group that publishes regularly (releases, tenders, ESG), headless pays off in 24 to 30 months thanks to fewer incidents and faster publishing.
Mini case study
Helene, communications director of a 600-employee construction group in Amsterdam, wants a bilingual corporate site with an investor area and dedicated pages for 4 subsidiaries. Chosen budget: EUR 34,000 on headless Sanity, plus EUR 600/month maintenance. Before the redesign, each press release took 3 hours to publish via an external vendor billed at EUR 90/hour, or EUR 270 per publication. With the internal approval workflow, the team publishes in 40 minutes without a vendor. Across 45 publications a year, the saving is about EUR 12,150/year; the governance investment (EUR 6,500) is recovered in under 7 months, not counting the faster response to tenders.
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FAQ
What is the minimum budget for a credible construction corporate site?
Below EUR 18,000, you sacrifice either multilingual scope, accessibility, or governance. For a group bidding on public contracts, all three are non-negotiable.
How long does production take?
Expect 10 to 16 weeks: 2-3 weeks of scoping, 4-6 of design, 4-6 of development, 2-3 of testing and content migration. The investor area adds roughly 2 weeks.
Is accessibility compliance mandatory?
For a private company without a public-service mission it is not legally imposed, but it becomes a scoring criterion in 60 to 70% of public tenders. The audit and fixes represent EUR 3,000 to 6,000.
How much is annual maintenance?
Maintenance of EUR 400 to 900/month, or EUR 4,800 to 10,800/year, covers security, updates, small evolutions and support. Professional CDN hosting adds EUR 100 to 300/month.
Can several subsidiaries live on one site?
Yes, a multi-section or multi-site architecture shares the design system while giving each subsidiary its own editorial space. Budget EUR 1,500 to 3,000 per additional subsidiary.
Let's scope your project. Send us the target page count, number of subsidiaries and languages, plus your indicative budget and deadline. 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.
