The verdict in three sentences
A corporate group website in London costs between 25,000 and 70,000 EUR in 2026, with the number of subsidiaries, editorial governance and SLA level setting the slider. A group of 3 to 5 entities with a shared CMS and a common design system lands around 40,000 EUR, over a 12 to 20 week timeline. Below 25,000 EUR you buy a disguised brochure site, not a governable corporate platform.
What a corporate group budget covers
The price of a corporate site is not just design. It funds a multi-site architecture, a CMS with a validation workflow, compliant hosting and a maintenance contract with an uptime commitment. Here is the typical breakdown of a 40,000 EUR project.
| Line item | Share of budget | Indicative 2026 amount |
|---|---|---|
| Scoping, UX, multi-site architecture | 15 % | 6,000 EUR |
| Design system + mockups | 20 % | 8,000 EUR |
| Front-end + CMS development | 35 % | 14,000 EUR |
| Editorial governance & roles | 10 % | 4,000 EUR |
| Content migration & integration | 10 % | 4,000 EUR |
| EU hosting + year 1 SLA | 10 % | 4,000 EUR |
The three tiers of a corporate project
The budget tracks scope directly. A single-brand group with 20 pages does not have the same needs as a holding with 5 multilingual subsidiaries.
| Tier | Scope | Timeline | 2026 price |
|---|---|---|---|
| Corporate Standard | 1 site, 15-30 pages, CMS, EN/FR | 8-12 wks | 25,000-35,000 EUR |
| Corporate Premium | Multi-site 3-5 subsidiaries, press portal | 12-16 wks | 40,000-55,000 EUR |
| Group / Holding | 5+ entities, design system delivered, 99.9 % SLA | 16-20 wks | 55,000-70,000 EUR |
| Annual maintenance | Support, security, enhancements | recurring | 6,000-18,000 EUR/yr |
| 99.9 % SLA on-call | 24/7 monitoring, < 4 h recovery | recurring | +4,000 EUR/yr |
Mini case study
Helen, communications director of a 4-subsidiary industrial group in London, compares two quotes: 32,000 EUR for a single site and 48,000 EUR for a multi-site architecture with a shared CMS. The multi-site option pools the design system and governance: instead of 4 separate builds at 18,000 EUR each (72,000 EUR), she pays 48,000 EUR. Immediate saving of 24,000 EUR, plus a 30 % editorial gain on publishing time because all 4 teams share the same templates. The 16,000 EUR premium over the single site is recouped as soon as the second subsidiary goes live.
FAQ
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Why does a group site cost more than a brochure site?
Because it funds a multi-site architecture, a validation workflow and an SLA. An 8,000 EUR brochure site offers neither governance nor uptime commitment, both essential for a listed or regulated group.
What timeline should I expect for a multi-subsidiary corporate site?
Plan for 12 to 20 weeks depending on the number of entities. Scoping and editorial governance alone often take 3 to 4 weeks before the first mockup.
Is a 99.9 % SLA really necessary?
For a group whose site carries investor or press relations, yes. 99.9 % allows about 8.7 hours of downtime per year; 24/7 on-call costs around 4,000 EUR/yr but avoids a blackout during an earnings release.
Can the budget be spread out?
Yes, via a phased launch: first the parent site and 2 subsidiaries, then the rest. This smooths the spend across 2 financial years without rebuilding the architecture.
What are the recurring costs after delivery?
Between 6,000 and 18,000 EUR/yr for maintenance, plus hosting and on-call. Budget around 15 to 20 % of the initial cost per year to keep the platform current and secure.
Let's scope your project. Tell us the number of subsidiaries, target languages and your SLA level, and we will frame the multi-site architecture and budget. 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.
