The verdict in three sentences
For a Berlin construction group with 3 subsidiaries and 250 employees, a corporate website built around project references costs EUR 14,000 to 32,000 and ships in 10 to 14 weeks. The core of the project is an interactive map of 50 to 150 projects, filterable by subsidiary, structure type and client. Reference sheets exportable as PDF turn the site into a sales tool for public tenders, where each bid requires 3 to 5 comparable references.
Budget breakdown in 2026
Agencies working for industry and construction price in work packages. The volume of references to enter weighs as much as the development itself.
| Work package | Range (EUR) | Duration | Scope |
|---|---|---|---|
| Scoping and group sitemap | 1,500 to 3,000 | 2 weeks | Workshops with management and the 3 subsidiaries |
| Corporate design | 3,000 to 6,000 | 2 to 3 weeks | Group web style guide, subsidiary variants |
| CMS development and subsidiary pages | 4,500 to 9,000 | 3 to 4 weeks | 20 to 40 templates, DE/EN |
| Reference database and interactive map | 2,500 to 6,500 | 2 to 3 weeks | 50 to 150 sheets, filters, geolocation |
| PDF export of reference sheets | 1,000 to 2,500 | 1 week | Template matching tender documentation |
| Careers area | 1,000 to 3,000 | 1 to 2 weeks | Jobs by subsidiary, mobile application, ATS link |
| Project data entry and photos | 500 to 2,000 | In parallel | Spreadsheet import, photo editing |
| Total | 14,000 to 32,000 | 10 to 14 weeks | Operational group website |
An additional language, such as Polish for cross-border recruitment, adds EUR 2,500 to 5,000. It pays off if the group bids on contracts in Brandenburg's border region or hires from Poland.
What public clients expect
A municipality, housing association or hospital reviewing a bid checks the group's technical capacity. The site must provide the evidence in under two clicks.
| Information on the reference sheet | Use by the public buyer | CMS field |
|---|---|---|
| Structure type and trade package | Check similarity with the contract | Drop-down list |
| Contract value | Compare with the target contract, e.g. EUR 2 to 8 million | Numeric field |
| Client and architect | Contact a referee | Text, written consent required |
| Year of handover | References under 5 years old required | Date |
| Certifications used (ISO 9001, SCC, PQ-VOB) | Capacity check | Checkboxes |
| Before and after photos | Assess workmanship | Gallery of 4 to 10 images |
| Environmental performance (DGNB, reuse) | Scoring criteria worth 10 to 30 % | Text and indicators |
With these structured fields, the PDF export produces a sheet ready to insert into the technical proposal, instead of rebuilding it in Word for every tender.
Recruitment: the site's second mission
Berlin's construction sector lacks site managers, foremen and skilled tradespeople. A well-designed careers area publishes each subsidiary's openings, shows ongoing projects and lets candidates apply in under 2 minutes from a smartphone. Connect it to an applicant tracking tool and measure cost per application: an effective site brings it down from EUR 150 to 250 through job boards to EUR 30 to 60 for direct applications.
Mini case study
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Thomas, CEO of a 250-employee construction group in Berlin, answers 40 public tenders a year. Each bid used to take 4 hours to gather and format references, or 160 hours a year at a loaded cost of EUR 55 per hour, about EUR 8,800. With the PDF export, he drops to 1 hour per bid, saving EUR 6,600 a year. His EUR 26,000 site also brings 120 direct applications a year, replacing 80 applications that cost EUR 200 each on job boards, or EUR 16,000 avoided. The project pays for itself in just over a year.
FAQ
How many references are needed at launch?
Fifty at minimum to cover the 3 subsidiaries and the main structure types. Plan 20 to 30 minutes of data entry per sheet, or an import from your existing spreadsheet.
Can public clients be named?
Yes for public contracts, whose awards are already published, but ask the referee's consent before showing contact details. For private clients, 30 to 50 % of sheets usually remain anonymised.
One site per subsidiary or one group site?
A group site with subsidiary sections costs 30 to 40 % less than three separate sites and pools SEO. Separate sites only make sense if the brands are very different.
What timeline for a launch before a trade fair?
Allow 10 to 14 weeks, plus 2 weeks of buffer for subsidiary managers' approval. Start in January for a fair in May.
What does maintenance cost afterwards?
EUR 250 to 600 per month with updates, backups and 2 to 4 enhancement hours to add new projects.
Let's scope your project. Tell us the number of subsidiaries, references to showcase and your tender deadlines: we price a group site between EUR 14,000 and 32,000 with an interactive map and PDF export. 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.
