The verdict in three sentences
A commercial interior design firm does not sell moods, it sells a move-in delivered on schedule, on budget, without stopping the business. A website that attracts facility managers and corporate real estate teams therefore relies on case studies with hard numbers (floor area, headcount, budget, timeline) and a qualification form that filters out residential requests. For a 12-person Berlin studio, the 2026 order of magnitude is 9,000 to 18,000 EUR excl. VAT over 8 to 10 weeks.
Why the beautiful portfolio fails to generate B2B leads
Most interior design websites show full-screen photos, an About page and a generic contact form. The result: the managing director gets requests to redo a kitchen in Prenzlauer Berg, and very few messages from facility managers preparing a 2,500 m² headquarters move.
A facility manager or head of workplace looks for three things before calling: comparable projects (size, sector, constraints), proof that you hit deadlines and a rough cost per square metre. If that information is missing, they move on or send blind requests to three studios.
| Website element | Classic portfolio | Site built for facility managers |
|---|---|---|
| Case studies | 8 to 10 photo galleries | 25 pages with area, headcount, budget, timeline |
| Filtering | None | By area, sector, type (HQ, floor plate, flex office) |
| Form | Name, email, message | Area, headcount, move-in date, indicative budget |
| Proof | Client logos | Real schedule, before/after, CFO testimonial |
| Expert content | Rare | Guides: m² per desk, flex office, Arbeitsstättenverordnung |
| Share of qualified enquiries | 10 to 20% | 50 to 70% targeted |
What such a website costs in Berlin in 2026
The ranges below are a 2026 order of magnitude seen among Berlin agencies and senior freelancers for a firm of this size. They depend mainly on the number of case studies to write and the quality of existing photography.
| Item | 2026 range (excl. VAT) | Notes |
|---|---|---|
| Strategy, sitemap, wireframes | 2,000 to 4,000 EUR | Workshops with partners and project leads |
| Development and CMS | 3,500 to 7,000 EUR | Filterable project pages, service pages |
| Writing 25 case studies | 2,000 to 4,000 EUR | 400 to 600 words each, verified data |
| Qualification form and CRM | 1,500 to 3,000 EUR | Lead scoring, routing to the right partner |
| Technical and local SEO | Included or 800 to 1,500 EUR | Pages for Berlin, Potsdam, Mitte, Kreuzberg |
| Monthly maintenance | 90 to 160 EUR per month | Updates, backups, small changes |
| Total project | 9,000 to 18,000 EUR | 8 to 10 weeks |
At Kolonell, a showcase website sits within our public grid: Starter from 800,000 to 1,200,000 FCFA (1,220 to 1,830 EUR), Growth from 1,200,000 to 2,000,000 FCFA (1,830 to 3,050 EUR) and Premium from 2,000,000 to 3,500,000 FCFA (3,050 to 5,340 EUR). A 25-case-study portfolio with a qualification form usually falls under Premium; case study writing and specific options are quoted separately. Maintenance follows our plans at 35,000, 75,000 or 120,000 FCFA per month (53, 114 or 183 EUR).
The qualification form is the centrepiece
The form should ask four or five precise questions: floor area, number of workstations, target move-in date, project type (relocation, refurbishment, expansion) and budget band. These answers produce a score and route the enquiry automatically to the right person.
An enquiry reading 1,800 m², 140 desks, move-in in 9 months goes straight to the partner in charge of key accounts, with an alert. A 60 m² private apartment request gets a polite reply and a referral. The studio saves several hours of sorting each week and answers good prospects within 24 hours, which often decides the deal when two competitors are consulted in parallel.
For SEO, the pages that convert best are practical guides for workplace teams: square metres per desk in 2026, average cost of fitting out a floor plate, a headquarters relocation checklist. Each guide links to comparable case studies and to the form. In Germany, a clean Impressum, GDPR-compliant consent and hosting in the EU are also expected by corporate buyers.
Mini case study
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Sarah, managing director of an office fit-out studio in Berlin, delivers 40 projects a year with average fees of 28,000 EUR. Her old site produced 20 enquiries a month, only 3 of them qualified, with a 25% win rate.
After the redesign, the site targets 15 qualified enquiries a month. At the same 25% win rate, that is 3.75 potential projects per month. Even if capacity limits growth to 6 extra projects a year, the maths is clear: 6 × 28,000 EUR = 168,000 EUR in additional fees. Against an investment of 15,000 EUR excl. VAT plus 1,500 EUR yearly maintenance, the site pays for itself with the first signed project.
FAQ
How many case studies do we need at launch?
Twelve well-documented case studies are enough to launch, with 25 reached within 6 months. Each one should state floor area, headcount, project duration and a budget band.
Should we publish client budgets?
A range is enough, for example 450 to 600 EUR per m² excl. VAT. Get written approval; in practice 70 to 80% of corporate clients accept anonymised figures.
How long before qualified enquiries arrive?
Organic enquiries usually start 3 to 6 months after launch. A LinkedIn campaign targeting facility managers in Berlin and Brandenburg can bring first results within the first month.
Do we need German and English versions?
Berlin clients include many international tenants, so English versions of your 10 best case studies are a sensible start. Languages are set in the quote.
What maintenance should we budget?
Plan 90 to 160 EUR per month on the Berlin market for updates, backups and new case studies. Also allow 2 to 3 internal hours a month to publish new projects.
Let's scope your project. Send us your reference projects and lead targets, and we will define the sitemap, case study format and launch 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.
