Software for real estate.

Real estate software is custom software that lets landlords, managers and brokers manage their properties, tenants and contracts, often with a calculation engine tied to the law. The difference with general business software is in the domain knowledge: rents, point counts and deadlines are set in law and change regularly.

In practice it comes down to two things at once: the management of properties and tenants, and the calculations that go with it. A mistake in a rent calculation costs money and can come back legally, so the calculation side has to be right down to the point. Examples from our work:

• A tool that runs the housing valuation system and shows which maximum rent is allowed.
• A tenant portal where residents report repairs and find documents.
• An occupancy and inventory system that shows which units are free or occupied.
• API connections with accounting, payments and external property sources.

The hallmark of good real estate software is that the calculations are reproducible: the same property with the same characteristics always gives the same, checkable result, even after the law has changed.

Dutch rental legislation is not a standing target. With the Affordable Rent Act and the annual adjustments to the housing valuation system, the rules shift regularly. Software that calculates on this has to be right not just today but also updatable without rewriting the whole application. So we build the calculation rules as a separate, tested layer.

For HuurrechtHulp we built tooling that helps tenants understand their rights, with the right calculation underneath. We work out a WWS point count based on verified, current data, without assumptions, because a wrong outcome has immediate financial consequences. The Dutch government publishes the current rules on rents and the point system, see rijksoverheid.nl. We take those rules as the source, not our memory.

What happens when the rent law changes? Because the calculation rules sit in a separate layer with their own tests, we adjust that layer without touching the rest of the system. Your tool then keeps calculating with the new norms, and the old calculations stay traceable as they were.

What we build in by default for a calculation tool in real estate:

• A separate, tested calculation layer that can be updated apart from the interface.
• Reproducible outcomes: the same input always gives the same result.
• A traceable overview of how an outcome was built up.
• Version control on the legislation, so old calculations stay correct.

Beyond the calculation side there is the daily management: which property is occupied, which tenant filed a report, which payment is outstanding. We build this as a central system that connects with the tools you already use, so you do not have to enter the same data three times.

For FlexBedden we worked on a platform for the rental and occupancy of units, where insight into availability is the heart of the system. We connect through our API development to accounting, payments and external property sources, and set it up as multi-tenant SaaS so a manager with several portfolios keeps them separate.

The order in which we tackle a real estate project:

1. Map the management process and the calculations needed.
2. Build the calculation layer and validate it on verified, current data.
3. Set up the management and the connections around it.
4. Go live and update as soon as the legislation changes.

A good real estate platform is not a static database. It grows with your portfolio and stays correct when the rules change, without starting over each time.