The verdict in three sentences
Migrating a real-estate agency off legacy software onto a custom platform costs USD 11,000-19,000 for the build plus USD 1,500-2,700 for data migration. The real work is not development but the listing migration and deduplication, secured by a multi-week dual run. Done well, the migration saves 8 hours/week and pays back in about 20 months.
The migration budget
A migration breaks into build, data migration and change support. Here is the 2026 order of magnitude for the Toronto market.
| Item | 2026 budget (USD) | Timeline | Note |
|---|---|---|---|
| Custom platform build | 11,000 - 19,000 | 14-20 wks | CRM, listings, properties, clients |
| Migration and deduplication | 1,500 - 2,700 | 3-5 wks | Listings, history, duplicates |
| Dual run (parallel) | 1,200 - 2,000 | 3-4 wks | Old + new in parallel |
| Team training | 700 - 1,200 | 1-2 wks | Agents and back office |
| Project total | 14,400 - 24,900 | 14-20 wks | Excludes maintenance |
At the USD 370/day rate for a senior profile in Toronto, a median USD 14,500 build represents roughly 39 person-days, plus the data migration and dual run, both often underestimated in low-cost quotes.
Listing migration, deduplication and dual run
The breaking point of a real-estate migration is the quality of inherited data. Spreadsheets and legacy software accumulate duplicates, expired listings and incomplete records. The migration must clean before it loads.
| Migration step | Goal | Risk if neglected |
|---|---|---|
| Legacy + spreadsheet extract | Recover all history | Loss of active listings |
| Client/property dedup | One unique record per entity | Double outreach, poor image |
| Listing mapping | Correct statuses and expiries | Selling under an expired listing |
| Quality control | Error rate < 2% | False data in production |
| Dual run | Validate before cutover | Business interruption |
The dual run means running the old and new systems in parallel for 3-4 weeks: you compare outputs and only retire the legacy once reliability is proven. Plan maintenance of USD 590/month after cutover for fixes and enhancements.
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Mini case study
Oumar runs a 6-agent real-estate agency in Toronto, with aging legacy software and three parallel spreadsheets. His agents lose about 8 hours/week re-keying and hunting for scattered information, roughly USD 8,500/year in loaded cost across the team. The chosen migration costs USD 17,300 (build + migration + dual run + training) plus USD 590/month maintenance. By recovering the equivalent of USD 8,500/year in agent time and making listing tracking reliable, Oumar reaches break-even around month 20, while cutting the outreach errors that were costing him listings.
FAQ
What does data migration cost in a project like this? Between USD 1,500 and 2,700 depending on the volume and quality of legacy data. It is often the underestimated item: dirty data requires deep cleaning and deduplication before loading.
Is the dual run really necessary? Yes, to avoid any business interruption. Running the old and new systems in parallel for 3-4 weeks validates reliability before permanently retiring the legacy.
What is the timeline for a 6-agent agency? Plan 14 to 20 weeks, including build, migration, dual run and training. A rushed migration without a dual run risks losing listings in production.
What happens to active listings during migration? They are extracted, deduplicated and remapped with their statuses and expiries. Quality control must guarantee an error rate below 2% before cutover to avoid selling under an expired listing.
What maintenance budget after migration? About USD 590/month for fixes, enhancements and adjustments. That is the cost of reliability for a platform that becomes the agency's operational core.
Let's scope your project. Tell us your current legacy software, listing volume and spreadsheets and we will price the build, data migration and dual run. 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.
