Condominium Management Software: Custom Build vs Vendor in 2026

The verdict in three sentences

For an independent property manager running 240 condominiums and 8,500 units, the question is not "vendor or custom" in the abstract, but at what volume a per-unit licence costs more than owning a tool. Our calculations put the break-even point around 6,000 units, provided you count the real cost of ownership: an internal product team, accounting and regulatory monitoring, and maintenance. Above that, a custom tool built in 5 to 8 months becomes an asset that sets the firm apart from large networks.

What condominium management software must cover in 2026

Condominium management software is far more than a CRM. It runs each building's accounts under sector-specific accounting rules, quarterly service charge calls, supplier and contract management, preparation and conduct of general meetings, and an owner portal (mandatory for professional managers in France since 2020, and a standard expectation in most European markets). With remote and hybrid general meetings now common, it must also handle electronic notices, postal voting and minutes.

Accounting is the line that tips budgets: it needs updates at every regulatory change and audit-grade rigour. That is why custom only makes sense for a firm that has reached critical size.

The break-even calculation

Market vendors charge, as a 2026 order of magnitude, EUR 1.5 to 3 per unit per month, with the owner portal and meeting modules included or optional depending on the plan. For 8,500 units, that is EUR 153,000 to 306,000 a year. A custom tool's cost of ownership, on the other hand, is not just the build.

At the low rate of EUR 1.5 per unit per month, the licence reaches EUR 108,000 a year at 6,000 units, matching the custom cost of ownership. Below that, the vendor remains the rational choice. Above it, every extra unit widens the gap in favour of the owned tool, whose marginal cost per unit is close to zero.

How to build without disrupting operations

The classic trap is a big-bang switch. We recommend a three-step rollout over 5 to 8 months. Step one: the owner portal and the property manager app, connected to the existing accounting, because that is what clients see and what differentiates the firm. Step two: service charge calls, reminders and remote general meetings. Step three only: accounting migration, with parallel bookkeeping over one financial year for a sample of 10 to 15 pilot buildings.

Data portability matters too. With a vendor, retrieving the accounting history of 240 buildings can take weeks and incur export fees. With an owned tool, the data is yours from day one, which also weighs in the firm's valuation in a sale or merger.

Mini case study

Sophie Marchand, managing director of an independent property manager with 240 condominiums and 8,500 units, pays her vendor EUR 1.9 per unit per month:

• Current vendor cost: 8,500 × 1.9 × 12 = EUR 193,800 a year
• Estimated custom cost of ownership: EUR 110,000 a year (product owner, accounting monitoring, support, maintenance, amortisation)
• Annual saving: 193,800 − 110,000 = EUR 83,800

Over five years, the gap exceeds EUR 400,000, before portfolio growth: each new 35 unit building would cost EUR 798 a year in licences with the vendor and almost nothing in the owned tool. Sophie chose to start with the owner portal and manager app, live after 4 months, before committing to the accounting migration.

FAQ

From how many units does custom software pay off?

In our calculations, around 6,000 units for a licence at EUR 1.5 per unit per month, and from 3,000 to 3,500 units if your vendor charges close to EUR 3. The result depends mostly on the cost of the internal team you assign.

Do we need to rebuild condominium accounting?

Not at first. Many firms keep accounting with the vendor for 12 to 18 months and start with the owner portal and meetings, which carry 60 to 70% of the value owners perceive.

How long does the full project take?

Allow 5 to 8 months for a tool covering the owner portal, service charge calls, remote meetings and the manager app. Accounting migration comes after, with one year of parallel bookkeeping on pilot buildings.

Are remote general meetings legally robust in a custom tool?

Yes, if the tool handles owner identification, majority calculation by ownership shares and vote timestamping. These rules are written into the specification and tested on at least 5 pilot meetings.

What if Kolonell stops maintaining the tool?

You own the source code and the data, with technical documentation delivered. Maintenance is contracted at 35,000, 75,000 or 120,000 FCFA per month (EUR 53, 114 or 183), and another provider can take over the code if needed.

Let's scope your project. We calculate your real break-even point with you and plan a progressive 5 to 8 month rollout, starting with the owner portal. Detailed quote within 48 h. WhatsApp +221 77 596 93 33.