The verdict in three sentences
To run your structural-works sites from the field, you have two paths: an off-the-shelf tool at 15-40 EUR/user/month, fast to launch but rigid, or a custom application at 40,000-90,000 EUR that fits your processes and works offline. Custom pays off once time tracking, photo reports and quantity surveys become strategic and your crew exceeds 40-50 workers. Budget 4 to 8 months of development, with ROI driven by 30% less reporting time and fewer disputes thanks to time-stamped photo traceability.
Off-the-shelf vs custom: the real 2026 costs
SaaS construction tools bill per active user: a site manager, a foreman, sometimes each worker. At 25 EUR/month for 30 users, that's 9,000 EUR/year, or 27,000 EUR over three years — without ever owning the tool or controlling its roadmap. Custom flips the logic: an upfront investment, then controlled maintenance.
| Criterion | Off-the-shelf | Custom application |
|---|---|---|
| Entry cost | 0-2,000 EUR (setup) | 40,000-90,000 EUR |
| Recurring cost | 15-40 EUR/user/month | 8-15% of build/year (maintenance) |
| 3-year cost (30 users) | 16,000-43,000 EUR | 50,000-110,000 EUR |
| Offline field mode | Partial or absent | Native (PWA/app) |
| Fit to your process | Low | Total |
| Code ownership | No | Yes |
| Time to launch | 2-6 weeks | 4-8 months |
The financial tipping point comes when headcount and simultaneous sites make per-seat subscriptions heavier than amortising a build. Above 50 users, custom often becomes cheaper from year three.
The modules of structural-works site tracking
A serious project is more than "taking photos." Here are the core modules and their indicative weight in a 2026 custom budget.
| Module | Contents | Budget weight | Priority |
|---|---|---|---|
| Field time tracking | Mobile clock-in, geoloc, hours per task | 8,000-14,000 EUR | High |
| Site reports | Daily logs, weather, incidents | 6,000-11,000 EUR | High |
| Photo traceability | Time-stamped + geotagged photos, before/after | 7,000-12,000 EUR | High |
| Quantities & progress | Volume tracking, % complete per lot | 9,000-16,000 EUR | Medium |
| Offline mode | Deferred sync, queue | 6,000-10,000 EUR | High |
| Executive dashboard | Multi-site KPIs, delay alerts | 5,000-9,000 EUR | Medium |
| Export & accounting | Bridge to ERP/payroll | 4,000-8,000 EUR | Variable |
Offline mode is not optional on site: unstable networks, basements, rural areas. The app must store locally, then sync as soon as the connection returns, with no data loss or duplicates.
Mini case study
Mark runs a 60-employee structural-works firm in Manchester, managing 7 sites at once. His site managers each spend ~6 hours/week consolidating Excel reports and scattered photos. Across 5 managers, that's 30 hours/week, or ~1,350 hours/year. At a loaded cost of 38 EUR/hour, he loses 51,300 EUR/year to manual reporting.
A custom app at 62,000 EUR cuts that time by 30%, freeing ~405 hours/year, or 15,390 EUR/year recovered. Adding fewer disputes (2 avoided/year at ~8,000 EUR each in costs and delays), the annual gain reaches ~31,000 EUR. The tool is paid back in 24 months, then generates net margin every year.
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FAQ
How much does site management software cost in 2026?
Between 15 and 40 EUR/user/month for an off-the-shelf tool, or 40,000 to 90,000 EUR for a custom app with offline mode and dedicated modules. The choice depends on user count and customisation needs.
Is offline mode really essential?
Yes for structural works: crews often work without a signal (basements, remote areas). An app without reliable deferred sync causes data loss and field rejection.
How long to deploy a custom tool?
Expect 4 to 8 months depending on scope. An MVP focused on time tracking + reports + photos can ship in 4 months, with quantities and accounting integrations following.
What ROI can I realistically expect?
On average 30% less reporting time and a measurable drop in disputes thanks to time-stamped photo traceability. For a 60-employee firm, payback is typically 20 to 24 months.
Can the tool connect to our ERP or payroll software?
Yes, via bridges (API or exports). Budget 4,000 to 8,000 EUR for a clean integration depending on the target system and sync frequency.
Let's scope your project. Tell us your headcount, number of simultaneous sites and priority modules (time tracking, reports, photos, offline) for an indicative budget between 40,000 and 90,000 EUR. 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.
