The verdict in three sentences
A developer handing over 900 homes a year in Amsterdam, Almere or Haarlem manages more than 15,000 snags at completion, spread across a dozen trades, and every open snag delays a key handover or fuels a complaint. A custom snagging web app costs EUR 45,000 to 90,000 and 3 to 5 months, while off-the-shelf tools charge EUR 30 to 60 per user per month. Custom makes sense when you want snags, subcontractors, buyer complaints and your ERP linked in one tool, with a target of 30 to 40% faster close-out.
The process to digitise
Many developers still track snags with paper sheets, phone photos and a shared spreadsheet. The site manager re-keys everything in the evening, contractors receive incomplete lists, and since the Wkb (Quality Assurance for Construction Act) came into force in 2024, the consumer file at handover makes poor records a legal exposure.
| Step | Current method | With the app |
|---|---|---|
| Pre-handover inspection | Paper sheet + photos on personal phone | Offline tablet, snag pinned on drawing, geotagged photo |
| Assignment to trade | Call or message to foreman | Automatic dispatch to the right contractor with contractual deadline |
| Snag close-out | Verbal confirmation | Close-out photo, site manager sign-off |
| Handover to buyer | Signed paper report | Digital report signed on tablet, copy emailed |
| Post-handover complaints | Calls and visits to the sales office | Buyer portal with online tracking |
| Reporting | Spreadsheet consolidated monthly | Dashboard by project, contractor and deadline |
Custom or off-the-shelf: 2026 budget
2026 estimates for 45 users (site managers, aftercare, technical management).
| Item (2026 estimate) | Off-the-shelf tool | Custom app |
|---|---|---|
| Initial investment | EUR 3,000 to 6,000 configuration | EUR 45,000 to 90,000 |
| Annual licences (45 users) | EUR 16,200 to 32,400 | EUR 0 |
| Annual maintenance and hosting | Included | EUR 24,000 to 42,000 (EUR 2,000 to 3,500/month) |
| Subcontractor access | Extra licences | Unlimited accounts |
| Buyer portal | Rarely available | Included |
| ERP and sales CRM integration | Limited | Custom API |
| Time to go live | 1 to 2 months | 3 to 5 months |
Indicators to track
| Indicator | Before | Target at 12 months |
|---|---|---|
| Snags per home at handover | 18 | 12 |
| Average close-out time | 45 days | 27 to 31 days |
| Snags closed before key handover | 60% | 85% |
| Admin time per snag | 20 min | 8 min |
| Buyer complaints per project | 140 | 80 |
Mini case study
Daan, technical director of a developer in Amsterdam, averages 16,200 snags a year (900 homes x 18). The app saves 12 minutes of data entry and chasing per snag, so 3,240 hours a year, valued at EUR 55 per hour: EUR 178,200. He chooses a custom project at EUR 70,000 with maintenance at EUR 3,000 per month (EUR 36,000 a year). Net annual gain: EUR 142,200, so payback in about 6 months. An off-the-shelf tool at EUR 45 per user would have cost EUR 24,300 a year, without a buyer portal or ERP link.
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FAQ
Does the app work in basements without signal?
Yes, the tablet stores drawings, snags and photos offline, then syncs when signal returns. The offline module represents about EUR 8,000 to 12,000 of the budget.
Do subcontractors need to pay for a licence?
No, they get free unlimited accounts with access limited to their own snags. A developer this size often works with 40 to 80 contractors.
Can we import project drawings?
Yes, PDF drawings are imported and split by floor and unit. Allow 1 to 2 days of preparation per 100-home project.
Can buyers see their snags?
Yes, the buyer portal shows the snags on their home and their status. It typically cuts calls to the sales office by 40 to 50%.
How long to get started?
Allow 3 to 5 months, with a pilot on a 60 to 120 home project before rollout across all sites.
Let's scope your project. Tell us your handover volume, current tools and active projects: we will price the scope, an indicative budget of EUR 45,000 to 90,000 and a 3 to 5 month plan. Detailed quote within 48 h via our quote form. 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.
