IN THE FIELD GUIDE

altum

altum.ai

Altum AI provides up-to-date housing data via APIs for valuation, sustainability, financing, and insurance, targeting banks, mortgage providers, and insurers. It offers over 30 APIs delivering property values, sustainability advice, transaction data, and neighborhood information, enabling integration into applications and workflows.

THE PRODUCT, BEYOND THE PITCH

Automatically researched · Not editorially reviewed · Sources checked Sep 13, 2026

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A good fit for

Banks, mortgage providers, and insurers seeking reliable housing data for decision-making.
Developers and PropTech companies integrating housing data into applications and workflows.

Know the limitations

Some data points may not be available for all properties, indicated by 'Niet Beschikbaar' (Not Available).

What you can do

Integrate housing data into advisory portals, CRM systems, or acceptance processes for internal use.
Display housing data in client portals, mortgage flows, or appraisal tools.

Features

Woningwaarde API provides market valuations of homes with an accuracy indicator for market value application.
WOZ API retrieves the latest WOZ value from the WOZ-waardeloket and can search by address or BAG-ID.
Verduurzaming API estimates current and potential NTA 8800 energy labels and generates sustainability advice per property.
Kadaster Transactie API provides transaction data such as prices from the Kadaster registry.
Conditie score API estimates unbiased condition scores for bathrooms and kitchens on a scale from 1 to 5.

Integrations

Altum AI APIs can be integrated into advisory portals, CRM systems, client portals, mortgage flows, and taxatietools.

Platforms & data export

Not confirmed yet.

THE COST FOR YOUR TEAM

Go beyond the starting price.

Published plan prices for your team size and usage. Results update as you type. Taxes, currency conversion and unlisted add-ons are excluded, and anything the source did not state is called out rather than guessed.

PeopleBillingCurrencyPrices are shown as published. No exchange rates are applied.Monthly usage per toolApplies to each tool’s own unit. Leave at 0 for subscription cost only.

Known monthly subtotal

$0.00/month

1 of 1 tools could not be priced with these inputs, so this is not the full cost.

Plan costs based on your requirements
Tool / plan	Monthly	Per year	What this assumes
altum	No pricing recorded yet. Check the official site, or ask the owner to add it.

A practical workflow

Create an account to receive an API key, then send your first request to retrieve data within five minutes.
Integrate Altum AI data directly into acceptance, advisory, or analysis processes for real estate portfolios.

Based on the sources below. Editorial review does not imply hands-on product testing.

Alternatives to explore

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What changed

Changes to the facts recorded here, not a live scan of every vendor update. Save this tool to follow updates in your account.

9/13/2026
Updated: best for, features, integrations, limitations, platforms, summary, use cases, walkthrough
See recorded changes
bestFor
Before: []
After: ["Banks, mortgage providers, and insurers seeking reliable housing data for decision-making.","Developers and PropTech companies integrating housing data into applications and workflows."]
features
Before: ["Access to over 30 APIs providing property value development, rental potential, sustainability potential, and more.","Provides sustainability advice including calculation of current and potential NTA 8800 energy labels, investment, and savings.","Delivers current housing values based on transaction data and property characteristics, suitable for acceptance processes.","Provides a WOZ API to retrieve the latest WOZ value by address or BAG-ID.","Kadaster Transaction API to retrieve transaction data such as price from the Kadaster with ping-free availability."]
After: ["Woningwaarde API provides market valuations of homes with an accuracy indicator for market value application.","WOZ API retrieves the latest WOZ value from the WOZ-waardeloket and can search by address or BAG-ID.","Verduurzaming API estimates current and potential NTA 8800 energy labels and generates sustainability advice per property.","Kadaster Transactie API provides transaction data such as prices from the Kadaster registry.","Conditie score API estimates unbiased condition scores for bathrooms and kitchens on a scale from 1 to 5."]
integrations
Before: []
After: ["Altum AI APIs can be integrated into advisory portals, CRM systems, client portals, mortgage flows, and taxatietools."]
limitations
Before: []
After: ["Some data points may not be available for all properties, indicated by 'Niet Beschikbaar' (Not Available)."]
platforms
Before: ["Accessible via REST APIs with sandbox environment for testing integrations."]
After: []
summary
Before: "Altum AI provides API access to comprehensive and current Dutch housing data for valuation, sustainability, financing, and insurance purposes. It serves banks, mortgage lenders, insurers, and developers by offering over 30 APIs delivering property values, sustainability advice, transaction data, and neighborhood information to support informed real estate decisions."
After: "Altum AI provides up-to-date housing data via APIs for valuation, sustainability, financing, and insurance, targeting banks, mortgage providers, and insurers. It offers over 30 APIs delivering property values, sustainability advice, transaction data, and neighborhood information, enabling integration into applications and workflows."
useCases
Before: ["Integrate housing data into advisory portals, CRM systems, or acceptance processes; display data in client portals, mortgage flows, or valuation tools; sell reports such as valuation reports, market analyses, or sustainability advice; enrich customer data with WOZ values, energy labels, or location data."]
After: ["Integrate housing data into advisory portals, CRM systems, or acceptance processes for internal use.","Display housing data in client portals, mortgage flows, or appraisal tools."]
walkthrough
Before: ["Create an account, receive an API key, send the first request, and retrieve data within five minutes.","Use over 30 APIs to obtain data on value development, rental potential, sustainability potential, and more for integration into acceptance, advisory, or analysis processes."]
After: ["Create an account to receive an API key, then send your first request to retrieve data within five minutes.","Integrate Altum AI data directly into acceptance, advisory, or analysis processes for real estate portfolios."]

Sources & research

How we research, calculate costs, and distinguish sponsorship