The verdict in three sentences
A residential developer delivering 350 homes a year while running stage payments, buyer variations and snagging on spreadsheets loses revenue and goodwill at every step. Off-the-shelf developer CRMs cost roughly £13,000 to £35,000 or $16,000 to $45,000 a year and handle sales well, but much less the post-exchange journey. A custom buyer portal connected to the existing CRM usually pays for itself through better-billed variations alone.
The off-plan cycle the software must follow
In London, buyers typically pay a 10% deposit at exchange and the balance at completion, with large schemes adding staged deposits; in Dubai, off-plan payment plans follow construction milestones, with payments into an escrow account registered with RERA. Either way, developers run 6 to 8 milestone-based payment calls or deposit stages per home, each needing evidence of progress, a buyer notice, sometimes lender information, and payment tracking.
Add specification choices (tiles, kitchens, layouts), chargeable buyer variations, then snagging at handover, to be resolved within the defects period (often 12 months, or 2 years under many UK warranty schemes). Across 350 homes, that is thousands of events a year.
| Annual event | Volume for 350 homes | Average manual time | With portal and automation |
|---|---|---|---|
| Payment calls issued | 2,100 to 2,800 | 20 to 25 min | 3 min, generated from progress |
| Chasing late payments | 300 to 500 | 15 min | Automatic reminder, lender follow-up |
| Specification choices | 350 files | 2 to 3 h each | 45 min, online configurator |
| Priced variations | 100 to 140 | 1 h 30 | 40 min, quote from library |
| Snags at handover | 3,500 to 5,000 | 10 min each | 3 min, photo and contractor assignment |
| Buyer queries | 4,000 to 6,000 | 6 min | Halved, information online |
2026 order of magnitude, observed among regional developers of comparable size.
Developer CRM or custom portal
Specialist vendors sell full developer CRMs: plot management, price lists, reservations, conveyancing tracking, sometimes a standard buyer portal. Annual cost runs at about £13,000 to £35,000 or $16,000 to $45,000 depending on schemes and users.
| Criterion | Off-the-shelf developer CRM | Connected custom buyer portal |
|---|---|---|
| Entry cost | Setup £4,000 to £13,000 or $5,000 to $16,000 | Medium application 4,000,000 to 7,000,000 FCFA (6,100 to 10,670 EUR) or complex 7,000,000 to 15,000,000+ FCFA (10,670 to 22,870+ EUR) |
| Recurring cost | £13,000 to £35,000 or $16,000 to $45,000 a year | Maintenance 120,000 FCFA a month (183 EUR) |
| Time to go live | 2 to 4 months | 4 to 6 months |
| Sales and plot inventory | Strength | Stays in the existing CRM |
| Specification configurator | Standard or missing | Your ranges, prices and visuals |
| Buyer variations | Often tracked by hand | Online quote, signature and invoicing |
| Snagging | Optional module | Mobile app with photos and contractors |
Vendor prices: 2026 order of magnitude for the UK and UAE markets. Kolonell figures: our public custom application grid, in FCFA and EUR.
For most developers, the best setup keeps the CRM for sales and builds the portal for after-sales, synced through an API.
What to scope with the technical director
The source of progress. A payment call must start from a milestone certified by the architect or project manager, recorded once and pushed to every unit in the block.
Variation rules. Cut-off date per unit, options catalogue, impact on programme, sign-off by the site manager. Without written rules, a configurator only speeds up chaos.
Snagging. Every snag is photographed, pinned on a plan, assigned to a contractor with a deadline, then closed and signed off by the buyer.
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Personal data. Mortgage details, bank data, ID documents: hosting in the UK or UAE as required, per-unit access, login logs, UK GDPR or UAE PDPL compliance.
Mini case study
James, development director at a London residential developer, delivers 350 homes a year. About 35% of buyers order variations, averaging £3,000. An audit shows 10% of that work is never invoiced for lack of tracking: 350 × 0.35 × £3,000 × 0.10 = £36,750 lost a year.
Then there are payment calls: 2,400 calls at 20 minutes, or 800 hours, that the portal brings down to about 120 hours. At £35 an hour loaded, that saves £23,800. A complex-level custom portal at 7,000,000 FCFA (10,670 EUR) with 120,000 FCFA monthly maintenance (2,196 EUR a year) costs 12,866 EUR in year one, against estimated annual gains of around £60,000.
FAQ
How much does off-plan sales tracking software cost?
An off-the-shelf developer CRM costs about £13,000 to £35,000 or $16,000 to $45,000 a year as a 2026 order of magnitude. A custom buyer portal falls within our medium (4,000,000 to 7,000,000 FCFA) or complex (from 7,000,000 FCFA) application grid, plus maintenance.
Should we drop our current CRM?
Rarely. The CRM keeps sales and plots, the portal handles after-sales. Sync runs through an API or a daily export.
Can buyers sign variations online?
Yes, with a compliant electronic signature. Average approval time often drops from 10 days to 3.
How long to launch the portal?
Allow 4 to 6 months, with a pilot on a live scheme of 40 to 80 homes before rollout.
How do we handle snags after handover?
The mobile app logs each snag with a photo and plan position, then sends it to the right contractor. Tracking covers the full defects period, often 12 to 24 months.
Let's scope your project. We map your off-plan cycle from reservation to snag closure, then deliver a pilot on a live scheme. 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.
