The verdict in three sentences
A custom construction project-management platform costs, in 2026, between 35,000 and 65,000 EUR (about 38,000-70,000 USD) for a field app + scheduling + purchasing scope. The payback comes from reporting time (-25%) and from project margin, better controlled thanks to real-time progress tracking. The real question is not price but scope: every module you add should repay its cost within twelve months.
What a custom construction platform covers
Unlike a generic tool, custom software fits your processes: subcontractor purchase orders, trade-by-trade time tracking, geolocated photo reports. It is built module by module, each activatable independently.
| Functional module | Contents | 2026 order of magnitude (EUR) |
|---|---|---|
| Mobile field app | Geotagged photos, time tracking, offline mode | 10,000 - 20,000 |
| Scheduling & progress | Gantt, milestones, % complete per lot | 8,000 - 15,000 |
| Purchasing & subcontractors | POs, receiving, progress billing | 6,000 - 12,000 |
| Margin dashboard | Committed cost vs budget, alerts | 5,000 - 9,000 |
| Reports & exports | Site PDFs, auto minutes | 3,000 - 6,000 |
| Typical full scope | app + scheduling + purchasing | 35,000 - 65,000 |
Offline mode is non-negotiable on sites in dead zones: the app stores data locally, then syncs on reconnection. Budget 15-20% extra on the mobile module for robust sync with conflict handling.
Custom vs off-the-shelf
| Criterion | Construction SaaS (Procore, Buildertrend...) | Custom Kolonell |
|---|---|---|
| Entry cost | 40-90 EUR/user/month | 35,000-65,000 EUR once |
| Cost at 10 users / 5 years | 24,000-54,000 EUR | 35,000-65,000 EUR + maintenance |
| Process fit | Limited to options | Total |
| Code ownership | No | Yes |
| Accounting integration | Via connectors | Custom (API, ERP) |
| Advanced offline | Rare | Native |
Below 5 users with standard processes, a SaaS often stays more rational. Beyond that, or as soon as your methods are a competitive edge, custom becomes relevant: it removes the per-seat cost and makes you the owner of the tool.
Mini case study
Sarah, operations director of a 45-person structural contractor near Manchester, spent 6 hours a week consolidating site reports in Excel. After deploying a field app + margin dashboard (budget 48,000 EUR / ~52,000 USD), reporting dropped to 1.5 hours a week. Saving: 4.5 hours/week at a 60 EUR loaded hourly cost, about 13,500 EUR/year. In parallel, early detection of 3 budget overruns preserved nearly 22,000 EUR of margin in year one. Estimated payback: under 18 months.
FAQ
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How much does custom construction software cost in 2026?
Expect 35,000 to 65,000 EUR for a field app + scheduling + purchasing scope. An MVP focused on time tracking and photos can start around 18,000 EUR.
Is offline mode really reliable on site?
Yes, if designed from the start: local storage, a sync queue and conflict resolution. That is 15-20% extra on the mobile module, but essential in dead zones.
Can it integrate with our accounting/ERP?
Yes. An API or normalized-export integration typically costs 4,000 to 10,000 EUR depending on the level of automation.
What delivery timeline should we plan?
A first usable release in 8-12 weeks, then monthly iterations. The full scope deploys over 4-6 months.
Who owns the code?
You do. On a custom project the source code is yours, with no per-user fee and no vendor lock-in.
Let's scope your project. Tell us your typical sites, field-user count and indicative budget, and we'll frame the priority scope and offline strategy. 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.
