The verdict in three sentences
A custom real estate developer platform costs between 55,000 and 130,000 EUR in 2026, depending on the number of projects and the complexity of payment calls. The buyer portal (reservation tracking, documents, progress) adds 10,000 to 20,000 EUR and the timeline spans 16 to 24 weeks. For a Berlin developer running 3 to 8 active projects, the 6 hrs/week saved on payment-call tracking secures cash flow and justifies the project.
What a developer platform drives
Property development chains long processes: project setup, marketing, reservations, staged payment calls (off-plan / notarial schedules), then handover and after-sales. A vertical tool links these stages to cash flow and legal. Here are the 2026 orders of magnitude for a mid-sized Berlin developer.
| Item | 2026 range | Indicative timeline |
|---|---|---|
| Project & unit management | 12,000-25,000 EUR | 3-5 weeks |
| Marketing & reservations | 10,000-22,000 EUR | 3-4 weeks |
| Payment calls & schedules | 14,000-30,000 EUR | 4-6 weeks |
| Buyer portal | 10,000-20,000 EUR | 3-4 weeks |
| After-sales & handover (snagging) | 9,000-18,000 EUR | 3 weeks |
The payment-call module is the heart of the system: it computes instalments by construction progress, generates letters and tracks receipts. A payment-call error directly delays the project's cash flow.
Custom or market suite
Several vertical suites exist for development, but they impose their processes. Custom is justified as soon as your financing structures or approval flows are specific. Here is the 2026 comparison.
| Criterion | Vertical suite | Custom build |
|---|---|---|
| Build / setup | 8,000-20,000 EUR | 55,000-130,000 EUR |
| Subscription | 150-400 EUR/user/month | 0 |
| Buyer portal | Standard | Customised |
| Specific payment calls | Partial | Total |
| Timeline | 4-8 weeks | 16-24 weeks |
| Maintenance | Included | 1,000-2,800 EUR/month |
| Ownership | No | Yes |
For 8 to 15 users, a suite subscription quickly hits 30,000 to 60,000 EUR/year: custom then amortises over 3 to 4 years.
Mini case study
Sophie is director of a Berlin developer, 6 active projects and 4 staff on financial tracking. Each spends 6 hrs/week checking and chasing payment calls by hand. At 42 EUR/hr loaded, that is 4 x 6 x 42 = 1,008 EUR/week, roughly 44,000 EUR/year. A custom platform at 95,000 EUR plus 1,800 EUR/month maintenance cuts that time by 60% and removes collection delays estimated at 25,000 EUR/year of tied-up cash. Operational saving of about 51,000 EUR/year: payback in 26 months.
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FAQ
Why specific software rather than a generic ERP?
Staged payment calls and unit management follow logic specific to development. A generic ERP needs as much configuration as custom, without the flexibility on your financing structures.
How much does the buyer portal cost?
Between 10,000 and 20,000 EUR depending on features (reservation tracking, documents, photo progress, messaging). It is a strong sales argument and a way to cut calls to customer service.
How long until a first project is managed in the tool?
Allow 16 to 24 weeks for the full scope, but a first project can be driven from week 10 if you prioritise projects + payment calls.
Does the software handle staged off-plan schedules?
Yes, instalment schedules (5%, 35%, 70%, etc.) are configurable by actual construction progress and generate compliant documents.
What maintenance budget should I plan?
Between 1,000 and 2,800 EUR/month depending on the number of projects, accounting integrations and the frequency of regulatory updates.
Let's scope your project. Tell us your number of projects, your payment-call flows and your buyer-portal needs: we scope the perimeter, an indicative budget and a timeline. 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.
