The verdict in three sentences
An engineering consultancy in Berlin focused on building energy has a rare commercial lever: the Building Energy Act (GEG) and federal funding for renovation push thousands of property owners to hire experts, and they search online. A website that converts costs in the 2026 Berlin market roughly 6,000 to 14,000 EUR with a local agency, plus an optional energy savings calculator at 1,500 to 4,000 EUR. The smart sequence is to fund project references with measured results and a qualifying pre-assessment form first, then the interactive tool once request volume justifies it.
What a German property owner looks for
A commercial or residential owner in Berlin needs energy performance certificates, renovation roadmaps (iSFP), heating compliance under the GEG and support for federal funding applications through BAFA and KfW. A developer needs energy calculations at permit stage and proof at completion. These decision makers want to know whether you handle their exact case, what a study costs and how fast you deliver.
The site should therefore present services by obligation and funding programme, not by engineering jargon. German law also requires a full Impressum and a GDPR-compliant privacy page, and most clients expect German first with an English version for international investors.
| Page or feature | Target decision maker | 2026 ballpark (EUR) |
|---|---|---|
| GEG compliance and heating transition services | Owners, property managers | 600 to 1,500 |
| Energy certificates and renovation roadmaps | Housing companies, landlords | 600 to 1,500 |
| References with measured energy savings | All | 800 to 2,000 |
| Qualifying pre-assessment form | All | 400 to 1,200 |
| Energy savings or funding calculator | Portfolio managers | 1,500 to 4,000 |
| Regulatory blog (deadlines, funding updates) | Long-tail SEO | 300 to 800 per month |
Website cost for an engineering consultancy: Berlin market and Kolonell grid
In Berlin, an agency typically charges 6,000 to 14,000 EUR for a 10 to 25 page bilingual site with references and advanced forms, delivered in 5 to 8 weeks. Kolonell, a French-speaking agency delivering remotely, prices a Growth site at 1,830 to 3,050 EUR and a Premium site at 3,050 to 5,340 EUR (grid of 11 October 2026). If the calculator needs real business logic connected to a database, it becomes a custom application starting at 3,810 EUR.
Germany's digitalisation support for small firms changes frequently; some federal states run grants for SME digital projects, so check current eligibility before signing.
| Configuration | Content | Indicative budget | Timeline |
|---|---|---|---|
| Kolonell Starter | 5 pages, simple form | 1,220 to 1,830 EUR | 3 to 4 weeks |
| Kolonell Growth | Service pages, references, blog, analytics | 1,830 to 3,050 EUR | 5 to 6 weeks |
| Kolonell Premium | Growth + animation, in-depth SEO | 3,050 to 5,340 EUR | 6 to 8 weeks |
| Berlin agency (ballpark) | Full bilingual B2B site | 6,000 to 14,000 EUR | 5 to 8 weeks |
| Custom savings calculator | Business logic, PDF export | 1,500 to 4,000 EUR (market) | 2 to 4 weeks |
| Kolonell maintenance | Updates, backups | 50 to 180 EUR per month | Ongoing |
Mini case study
Lukas, managing director of an 8-engineer energy consultancy in Berlin (illustrative persona), orders a Premium site at 4,500 EUR and Growth SEO at 300 EUR per month for a year, 8,100 EUR in total. A renovation roadmap plus funding support for a mid-size apartment building is billed roughly 5,000 to 10,000 EUR on the market. If the site brings 2 qualified requests per month and one in six closes, he signs 4 projects a year, about 30,000 EUR of revenue at 7,500 EUR per project. The investment is then well under a third of the revenue generated.
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FAQ
How much does a website for an engineering consultancy in Berlin cost?
The 2026 ballpark is 6,000 to 14,000 EUR with a local agency. Kolonell's grid puts a Growth site at 1,830 to 3,050 EUR and Premium at 3,050 to 5,340 EUR.
Is the savings calculator essential?
No, it pays off once the site already generates several requests per month. Budget 1,500 to 4,000 EUR and start with a 5 to 7 question pre-assessment form.
Does the site need to be in German?
For local owners and housing companies, yes: German first, English second for investors. Add a compliant Impressum and privacy page, which German law requires for any business site.
What timeline should I plan?
Allow 5 to 8 weeks for a complete site, including 1 to 2 weeks to gather references and energy performance figures. A calculator adds 2 to 4 weeks.
Should I publish clients' energy savings?
Yes, with permission: a 25 to 45 % reduction in measured consumption is the strongest argument for a portfolio manager. Anonymise the client if needed, but keep floor area, use and result.
Let's scope your project. Pages per regulation, quantified references, online pre-assessment: we define the scope and a budget of 1,830 to 5,340 EUR for launch in 5 to 8 weeks. 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.
