Custom housing points system calculator development
Appfront builds calculation tools for landlords who want to keep track of points under the Dutch residential valuation system (woningwaarderingsstelsel) across their entire portfolio. Per dwelling, the components that generate points, such as floor area, energy label, facilities and WOZ value, are drawn from your own property data. The tool calculates the points, shows which segment a dwelling falls into, and flags when a renovation, new energy label or new WOZ value changes the outcome.
What is a calculation tool for the residential valuation system?
The Dutch rent assessment system (woningwaarderingsstelsel, WWS) awards points to a rental home for factors including floor area, energy label, kitchen and bathroom facilities, outdoor space and the WOZ property value. The number of points determines the maximum rent. Since the Affordable Rent Act (Wet betaalbare huur), the system applies not only to social housing but also to a large part of the mid-market rental sector. For landlords with many properties, the points calculation has therefore become more important.
Calculation tools exist for working out the points of a single property, including the official check from the Rent Tribunal (Huurcommissie). But a landlord with hundreds or thousands of homes wants to run the whole portfolio, using the data already held in the property management system. A new energy label after sustainability improvements, a new WOZ value or a renovated kitchen changes the points and sometimes the segment, and that needs to be flagged before a rent is set or changed.
We build custom solutions because landlords differ: which property data you have, how it is maintained, which housing types you own, and how the result needs to flow back into your rent administration. The rules of the system occasionally change, and you record which version applies; the tool calculates accordingly. An official assessment of a property remains with the Rent Tribunal; the tool gives you the overview in advance.
Points per property
The points for each property by component, drawn from your own data, with the calculation shown.
The entire portfolio
All properties calculated at once, with the segment for each property and a comparison with the current rent.
Changes flagged
An alert when a new label, new WOZ value or renovation changes the points or the segment.
How we build your rent assessment calculation tool
We start with your portfolio: which properties there are, what data already exists, where it is held, and how calculations are currently done.
Your properties, property data, labels, WOZ values and rent administration.
Floor areas, facilities and other components for each property, supplemented where data is missing.
The points calculation under the current rules, traceable by component.
Alerts on changes, integration with the rental administration, and management when new rules apply.
What a rent assessment calculation tool concretely does
The components below feature in almost every landlord with a large portfolio. Which ones you need depends on your portfolio.
Property data
Floor area, facilities and outdoor space per property.
Energy label and WOZ
Label and WOZ value from your own data.
Points calculation
Points per component and total per property.
Segment
The segment for each property based on its points.
Alerts
An alert when points or segment change.
Overview
The entire portfolio with points and current rent.
Who we build a rent assessment calculation tool for
The tool is intended for landlords who track points for many properties.
Housing associations
A large social rental portfolio. Calculating the entire portfolio is the core.
Private landlords
Properties across several segments. The segment for each property matters most.
Property managers
Landlords letting on behalf of owners. An overview per owner is what is needed.
Advisers
Points calculations for clients. The traceable calculation is the core.
Test your idea first: a working prototype in 1 day
With OneDayBuild, we turn your idea into something tangible in one day for €1,150, so you can see whether further development is worth the investment. Decide to go ahead with the full build? Then we credit the full cost.
Explore OneDayBuild →Technology and integrations
This page covers points scoring under the housing valuation system. For housing associations in general, see our page on software for housing associations; for tenants, our page on tenant selection with income testing; and for the Woningwet (Dutch Housing Act), our page on Woningwet software. You can read about our approach at building software.
Why choose Appfront for your rent assessment calculation tool?
A rent based on an outdated points system can be challenged with the Huurcommissie (the Dutch Rent Tribunal). That is where we build: traceable points for each home, the entire portfolio recalculated, and alerts for every change.
No more standalone calculations
Points are drawn from the data you already have.
Changes spotted
A new energy label or a new WOZ valuation is flagged.
Substantiated
For each home, you can see how its points were calculated.
Security and privacy for a points calculation tool under the Dutch rental valuation system
The tool holds data on homes, rents and, in some cases, tenants. Access is set by role. Tenants' personal data is not needed for the points calculation and stays in the rental administration.
The tool runs in a European data centre or in your own environment, with encrypted storage, daily backups and two-factor sign-in.
Frequently asked questions about a points calculation tool under the Dutch rental valuation system
Questions landlords ask before getting started.
It calculates the points for each home under the rental valuation system, using your own property data. It shows the segment, recalculates your entire portfolio, and flags when a change affects the points or the segment.
A points system that translates the quality of a rental home into a maximum permitted rent. Points are based on factors such as floor area, energy label, facilities, outdoor space and WOZ value (the Dutch property valuation). Since the Affordable Rent Act, it also applies to a large part of the mid-rent sector.
No. The Huurcommissie offers an official check per home and rules on disputes. This tool recalculates your entire portfolio from your own data, as an overview in advance. If you have doubts about a particular home, the official check remains decisive.
The rules of the system and the related tables sometimes change. You record which version applies, and the tool calculates on that basis. A new version is added in the administration, and the portfolio is recalculated.
From your property management system, where floor areas, labels and WOZ values are often already held. Anything missing, such as kitchen or sanitary details, is added, for example during an inspection or change of tenancy.
Yes. After a new energy label, a new WOZ valuation or a renovation, the tool recalculates the points and shows which homes change segment, before a rent is set or changed.
Check that first. Some housing association systems include a points calculation, and that is sufficient if your data in it is complete. Custom development makes sense if you draw data from several sources, want alerts when things change, or are a private landlord without a package that does this.
Want to see the points calculation for your entire portfolio?
Tell us how many homes you have, what data is available and how you calculate now. We will show you what the points calculation, overview and alerts look like.