# Sustainability

- [Sustainability Subsidy API](https://docs.altum.ai/english/sustainability/sustainability-subsidy-api.md): The Subsidies API enables users to discover sustainability subsidies in the Netherlands based on their postcode and access Dutch loan programs such as Warmtefonds and SVN.
- [Authentication, input and response](https://docs.altum.ai/english/sustainability/sustainability-subsidy-api/authentication-input-and-response.md)
- [API Key Information](https://docs.altum.ai/english/sustainability/sustainability-subsidy-api/api-key-information.md): Understanding and Obtaining Your API Key
- [Energylabel insights API](https://docs.altum.ai/english/sustainability/energylabel-insights-api.md): The Energylabel insights API returns the impact of an energylabel change on sale duration and difference in expected transaction price vs. asking price
- [Changelog](https://docs.altum.ai/english/sustainability/energylabel-insights-api/changelog.md): Changelog of the deploy of the Energylabel Insights API in format iteration (1.01) and (expected) release date (year, month and day)
- [Authentication, input and response](https://docs.altum.ai/english/sustainability/energylabel-insights-api/authentication-input-and-response.md)
- [API Key Information](https://docs.altum.ai/english/sustainability/energylabel-insights-api/api-key-information.md): Understanding and Obtaining Your API Key
- [Output interpretation](https://docs.altum.ai/english/sustainability/energylabel-insights-api/output-interpretation.md): An explanation and interpretation of every feature outputted in the API response.
- [EPC API](https://docs.altum.ai/english/sustainability/epc-api.md): The EPC API processes EPC PDFs and returns content on your current situation
- [Changelog](https://docs.altum.ai/english/sustainability/epc-api/changelog.md): Changelog of the deploy of the EPC API in format iteration (1.01) and (expected) release date (year, month and day).
- [API Key Information](https://docs.altum.ai/english/sustainability/epc-api/api-key-information.md): Understanding and Obtaining Your API Key
- [Authentication, input and response](https://docs.altum.ai/english/sustainability/epc-api/authentication-input-and-response.md): Details on input output and authentication requirements
- [Output Interpretation](https://docs.altum.ai/english/sustainability/epc-api/output-interpretation.md): An explanation and interpretation of every feature outputted in the API response.
- [Building geometry API](https://docs.altum.ai/english/sustainability/building-geometry-api.md): Fetch building geometry data from a building with the address as the input
- [Authentication, input and response](https://docs.altum.ai/english/sustainability/building-geometry-api/authentication-input-and-response.md)
- [API Key Information](https://docs.altum.ai/english/sustainability/building-geometry-api/api-key-information.md): Understanding and Obtaining Your API Key
- [Output interpretation](https://docs.altum.ai/english/sustainability/building-geometry-api/output-interpretation.md): An explanation and interpretation of every feature outputted in the API response.
- [NTA 8800 Energylabel API](https://docs.altum.ai/english/sustainability/nta-8800-energylabel-api.md): Welcome to the NTA 8800 Energylabel API documentation. This API uses a combination of various sources and methods to deliver the most accurate energy label estimates possible.
- [Changelog](https://docs.altum.ai/english/sustainability/nta-8800-energylabel-api/changelog.md): Changelog of the deploy of the Energylabel API in format iteration (1.01) and (expected) release date (year, month and day).
- [Authentication, input and response](https://docs.altum.ai/english/sustainability/nta-8800-energylabel-api/authentication-input-and-response.md)
- [API Key Information](https://docs.altum.ai/english/sustainability/nta-8800-energylabel-api/api-key-information.md): Understanding and Obtaining Your API Key
- [Output interpretation](https://docs.altum.ai/english/sustainability/nta-8800-energylabel-api/output-interpretation.md): An explanation and interpretation of every feature outputted in the API response.
- [NTA 8800 Energylabel v2 API](https://docs.altum.ai/english/sustainability/nta-8800-energylabel-v2-api.md): Welcome to the NTA 8800 Energylabel v2 API documentation. This API uses a combination of various sources and methods to deliver the most accurate energy label estimates possible.
- [Houses](https://docs.altum.ai/english/sustainability/nta-8800-energylabel-v2-api/houses.md)
- [Migration Guide: v1 → v2](https://docs.altum.ai/english/sustainability/nta-8800-energylabel-v2-api/houses/migration-guide-v1-v2.md): This page provides an overview of the changes required when migrating from v1 to v2 of the API.
- [Changelog](https://docs.altum.ai/english/sustainability/nta-8800-energylabel-v2-api/houses/changelog.md): Changelog of the deploy of the Energylabel v2 API in format iteration (1.01) and (expected) release date (year, month and day).
- [Authentication, input and response](https://docs.altum.ai/english/sustainability/nta-8800-energylabel-v2-api/houses/authentication-input-and-response.md)
- [API Key Information](https://docs.altum.ai/english/sustainability/nta-8800-energylabel-v2-api/houses/api-key-information.md): Understanding and Obtaining Your API Key
- [Example API calls](https://docs.altum.ai/english/sustainability/nta-8800-energylabel-v2-api/houses/example-api-calls.md): A collection of example API calls to the service.
- [Output interpretation](https://docs.altum.ai/english/sustainability/nta-8800-energylabel-v2-api/houses/output-interpretation.md): An explanation and interpretation of every feature outputted in the API response.
- [Accuracy indicator](https://docs.altum.ai/english/sustainability/nta-8800-energylabel-v2-api/houses/accuracy-indicator.md)
- [Apartments](https://docs.altum.ai/english/sustainability/nta-8800-energylabel-v2-api/apartments.md)
- [Migration Guide: v1 → v2](https://docs.altum.ai/english/sustainability/nta-8800-energylabel-v2-api/apartments/migration-guide-v1-v2.md): This page provides an overview of the changes required when migrating from v1 to v2 of the API.
- [Changelog](https://docs.altum.ai/english/sustainability/nta-8800-energylabel-v2-api/apartments/changelog.md): Changelog of the deploy of the Energylabel v2 API in format iteration (1.01) and (expected) release date (year, month and day).
- [Authentication, input and response](https://docs.altum.ai/english/sustainability/nta-8800-energylabel-v2-api/apartments/authentication-input-and-response.md)
- [API Key Information](https://docs.altum.ai/english/sustainability/nta-8800-energylabel-v2-api/apartments/api-key-information.md): Understanding and Obtaining Your API Key
- [Example API calls](https://docs.altum.ai/english/sustainability/nta-8800-energylabel-v2-api/apartments/example-api-calls.md): A collection of example API calls to the service.
- [Output interpretation](https://docs.altum.ai/english/sustainability/nta-8800-energylabel-v2-api/apartments/output-interpretation.md): An explanation and interpretation of every feature outputted in the API response.
- [Accuracy indicator](https://docs.altum.ai/english/sustainability/nta-8800-energylabel-v2-api/apartments/accuracy-indicator.md)
- [Frequently Asked Questions (FAQ)](https://docs.altum.ai/english/sustainability/nta-8800-energylabel-v2-api/frequently-asked-questions-faq.md)
- [Satellite Roof Scan](https://docs.altum.ai/english/sustainability/satellite-roof-scan.md): .This API adds intelligence to the energy transition by combining AI-driven detection with open services, enabling smarter decisions, faster adoption, and stronger collaboration in renewable energy.
- [Authentication, input and response](https://docs.altum.ai/english/sustainability/satellite-roof-scan/authentication-input-and-response.md)
- [API Key Information](https://docs.altum.ai/english/sustainability/satellite-roof-scan/api-key-information.md): Understanding and Obtaining Your API Key
- [Sustainability API](https://docs.altum.ai/english/sustainability/sustainability-api.md): Querying the Sustainability API for a Dutch home gives the sustainability measures and Ecovalue market value increase.
- [Changelog](https://docs.altum.ai/english/sustainability/sustainability-api/changelog.md): Changelog of the deploy of the Sustainability API in format iteration (1.01) and (expected) release date (year, month and day).
- [Authentication, input and response](https://docs.altum.ai/english/sustainability/sustainability-api/authentication-input-and-response.md)
- [API Key Information](https://docs.altum.ai/english/sustainability/sustainability-api/api-key-information.md): Understanding and Obtaining Your API Key
- [Energylabel](https://docs.altum.ai/english/sustainability/sustainability-api/energylabel.md): Explanation of the different energylabel inputs and outputs
- [Improving the advice](https://docs.altum.ai/english/sustainability/sustainability-api/improving-the-advice.md): The Sustainability API offers a lot of functions to improve the output from customers- and/or suppliers perspective. This page explains the different functions
- [Example API calls](https://docs.altum.ai/english/sustainability/sustainability-api/example-api-calls.md): A collection of example API calls to the service.
- [Output interpretation](https://docs.altum.ai/english/sustainability/sustainability-api/output-interpretation.md): An explanation and interpretation of every feature outputted in the API response.
- [Increasing energy costs](https://docs.altum.ai/english/sustainability/sustainability-api/increasing-energy-costs.md): How to use the API to adjust the calculations based on current or expected energy costs for gas and electricity.
- [Exclude measures](https://docs.altum.ai/english/sustainability/sustainability-api/exclude-measures.md)
- [Search criteria](https://docs.altum.ai/english/sustainability/sustainability-api/search-criteria.md)
- [Measures](https://docs.altum.ai/english/sustainability/sustainability-api/measures.md): Provides a detailed overview of various measure codes related to the sustainability aspects of buildings.
- [Insulation values](https://docs.altum.ai/english/sustainability/sustainability-api/insulation-values.md): Regarding the measures for insulation for the wall, roof and floor the specifications are found below.
- [Comfort score](https://docs.altum.ai/english/sustainability/sustainability-api/comfort-score.md): A comfort score is calculated for each home based on the home characteristics.
- [CO2](https://docs.altum.ai/english/sustainability/sustainability-api/co2.md): CO2 calculation
- [Coverage](https://docs.altum.ai/english/sustainability/sustainability-api/coverage.md): Unfortunately, it is not possible to (accurately) calculate the sustainability measures for all homes in the Netherlands. Below you will find the segments to which this applies, plus an explanation.
- [Cost table input](https://docs.altum.ai/english/sustainability/sustainability-api/cost-table-input.md): Depending on the supply chain partner handling the installation of measures it is possible to overwrite default values in regards to costs and calculations when given as input.
- [Frequently Asked Questions (FAQ)](https://docs.altum.ai/english/sustainability/sustainability-api/frequently-asked-questions-faq.md)
- [Sustainability API v2](https://docs.altum.ai/english/sustainability/sustainability-api-v2.md): Querying the Sustainability API for a Dutch home gives the sustainability measures and Ecovalue market value increase.
- [Changes from previous version](https://docs.altum.ai/english/sustainability/sustainability-api-v2/changes-from-previous-version.md)
- [Changelog](https://docs.altum.ai/english/sustainability/sustainability-api-v2/changelog.md): Changelog of the deploy of the Sustainability API in format iteration (1.01) and (expected) release date (year, month and day).
- [Authentication, input and response](https://docs.altum.ai/english/sustainability/sustainability-api-v2/authentication-input-and-response.md)
- [API Key Information](https://docs.altum.ai/english/sustainability/sustainability-api-v2/api-key-information.md): Understanding and Obtaining Your API Key
- [Example API calls](https://docs.altum.ai/english/sustainability/sustainability-api-v2/example-api-calls.md): A collection of example API calls to the service.
- [Output interpretation](https://docs.altum.ai/english/sustainability/sustainability-api-v2/output-interpretation.md): An explanation and interpretation of every feature outputted in the API response.
- [Accuracy indicator](https://docs.altum.ai/english/sustainability/sustainability-api-v2/accuracy-indicator.md)
- [Warnings](https://docs.altum.ai/english/sustainability/sustainability-api-v2/warnings.md)
- [Search criteria](https://docs.altum.ai/english/sustainability/sustainability-api-v2/search-criteria.md)
- [Measures](https://docs.altum.ai/english/sustainability/sustainability-api-v2/measures.md): Provides a detailed overview of various measure codes related to the sustainability aspects of buildings.
- [Insulation values](https://docs.altum.ai/english/sustainability/sustainability-api-v2/insulation-values.md): Regarding the measures for insulation for the wall, roof and floor the specifications are found below.
- [Measure filters](https://docs.altum.ai/english/sustainability/sustainability-api-v2/measure-filters.md): Provides a detailed overview of various measure filters.
- [Cost indicators](https://docs.altum.ai/english/sustainability/sustainability-api-v2/cost-indicators.md): Depending on the supply chain partner handling the installation of measures it is possible to overwrite default values in regards to costs and calculations when given as input.
- [Lock measures](https://docs.altum.ai/english/sustainability/sustainability-api-v2/lock-measures.md): With this function it is possible to lock measures from improvement via the input lock\_measures.
- [Exclude measures](https://docs.altum.ai/english/sustainability/sustainability-api-v2/exclude-measures.md): Next to the function of locking measures it is possible to exclude individual measures via the input exclude\_measures.
- [Energylabel](https://docs.altum.ai/english/sustainability/sustainability-api-v2/energylabel.md): Explanation of the different energylabel inputs and outputs
- [Coverage](https://docs.altum.ai/english/sustainability/sustainability-api-v2/coverage.md): Unfortunately, it is not possible to (accurately) calculate the sustainability measures for all homes in the Netherlands. Below you will find the segments to which this applies, plus an explanation.
- [CO₂ emissions](https://docs.altum.ai/english/sustainability/sustainability-api-v2/co-emissions.md): CO₂ calculation
- [Frequently Asked Questions (FAQ)](https://docs.altum.ai/english/sustainability/sustainability-api-v2/frequently-asked-questions-faq.md)
- [Sustainability API v2 for Apartments](https://docs.altum.ai/english/sustainability/sustainability-api-v2-apartments.md): Querying the Sustainability API for a Dutch home gives the sustainability measures and Ecovalue market value increase.
- [Changes from previous version](https://docs.altum.ai/english/sustainability/sustainability-api-v2-apartments/changes-from-previous-version.md)
- [Differences Single Family](https://docs.altum.ai/english/sustainability/sustainability-api-v2-apartments/differences-single-family.md)
- [Changelog](https://docs.altum.ai/english/sustainability/sustainability-api-v2-apartments/changelog.md): Changelog of the deploy of the Sustainability API in format iteration (1.01) and (expected) release date (year, month and day).
- [Authentication, input and response](https://docs.altum.ai/english/sustainability/sustainability-api-v2-apartments/authentication-input-and-response.md)
- [API Key Information](https://docs.altum.ai/english/sustainability/sustainability-api-v2-apartments/api-key-information.md): Understanding and Obtaining Your API Key
- [Example API calls](https://docs.altum.ai/english/sustainability/sustainability-api-v2-apartments/example-api-calls.md): A collection of example API calls to the service.
- [Output interpretation](https://docs.altum.ai/english/sustainability/sustainability-api-v2-apartments/output-interpretation.md): An explanation and interpretation of every feature outputted in the API response.
- [Accuracy indicator](https://docs.altum.ai/english/sustainability/sustainability-api-v2-apartments/accuracy-indicator.md)
- [Warnings](https://docs.altum.ai/english/sustainability/sustainability-api-v2-apartments/warnings.md)
- [Search criteria](https://docs.altum.ai/english/sustainability/sustainability-api-v2-apartments/search-criteria.md)
- [Measures](https://docs.altum.ai/english/sustainability/sustainability-api-v2-apartments/measures.md): Provides a detailed overview of various measure codes related to the sustainability aspects of buildings.
- [Insulation values](https://docs.altum.ai/english/sustainability/sustainability-api-v2-apartments/insulation-values.md): Regarding the measures for insulation for the wall, roof and floor the specifications are found below.
- [Measure filters](https://docs.altum.ai/english/sustainability/sustainability-api-v2-apartments/measure-filters.md): Provides a detailed overview of various measure filters.
- [Cost indicators](https://docs.altum.ai/english/sustainability/sustainability-api-v2-apartments/cost-indicators.md): Depending on the supply chain partner handling the installation of measures it is possible to overwrite default values in regards to costs and calculations when given as input.
- [Lock measures](https://docs.altum.ai/english/sustainability/sustainability-api-v2-apartments/lock-measures.md): With this function it is possible to lock measures from improvement via the input lock\_measures.
- [Exclude measures](https://docs.altum.ai/english/sustainability/sustainability-api-v2-apartments/exclude-measures.md): Next to the function of locking measures it is possible to exclude individual measures via the input exclude\_measures.
- [Energylabel](https://docs.altum.ai/english/sustainability/sustainability-api-v2-apartments/energylabel.md): Explanation of the different energylabel inputs and outputs
- [Coverage](https://docs.altum.ai/english/sustainability/sustainability-api-v2-apartments/coverage.md): Unfortunately, it is not possible to (accurately) calculate the sustainability measures for all homes in the Netherlands. Below you will find the segments to which this applies, plus an explanation.
- [CO₂ emissions](https://docs.altum.ai/english/sustainability/sustainability-api-v2-apartments/co-emissions.md): CO₂ calculation
- [Frequently Asked Questions (FAQ)](https://docs.altum.ai/english/sustainability/sustainability-api-v2-apartments/frequently-asked-questions-faq.md)
- [Sustainability API v2 Delta](https://docs.altum.ai/english/sustainability/sustainability-api-v2-delta.md): This Delta variant shows the results and impact of specific sustainability measures on a property, both financially and on the energy label.
- [Changelog](https://docs.altum.ai/english/sustainability/sustainability-api-v2-delta/changelog.md): Changelog of the deploy of the Sustainability API in format iteration (1.01) and (expected) release date (year, month and day).
- [Authentication, input and response](https://docs.altum.ai/english/sustainability/sustainability-api-v2-delta/authentication-input-and-response.md)
- [API Key Information](https://docs.altum.ai/english/sustainability/sustainability-api-v2-delta/api-key-information.md): Understanding and Obtaining Your API Key
- [Example API calls](https://docs.altum.ai/english/sustainability/sustainability-api-v2-delta/example-api-calls.md): A collection of example API calls to the service.
- [Output interpretation](https://docs.altum.ai/english/sustainability/sustainability-api-v2-delta/output-interpretation.md): An explanation and interpretation of every feature outputted in the API response.
- [Warnings](https://docs.altum.ai/english/sustainability/sustainability-api-v2-delta/warnings.md)
- [Measures](https://docs.altum.ai/english/sustainability/sustainability-api-v2-delta/measures.md): Provides a detailed overview of various measure codes related to the sustainability aspects of buildings.
- [Insulation values](https://docs.altum.ai/english/sustainability/sustainability-api-v2-delta/insulation-values.md): Regarding the measures for insulation for the wall, roof and floor the specifications are found below.
- [Measure filters](https://docs.altum.ai/english/sustainability/sustainability-api-v2-delta/measure-filters.md): Provides a detailed overview of various measure filters.
- [Cost indicators](https://docs.altum.ai/english/sustainability/sustainability-api-v2-delta/cost-table-input.md): Depending on the supply chain partner handling the installation of measures it is possible to overwrite default values in regards to costs and calculations when given as input.
- [Energylabel](https://docs.altum.ai/english/sustainability/sustainability-api-v2-delta/energylabel.md): Explanation of the different energylabel inputs and outputs
- [Coverage](https://docs.altum.ai/english/sustainability/sustainability-api-v2-delta/coverage.md): Unfortunately, it is not possible to (accurately) calculate the sustainability measures for all homes in the Netherlands. Below you will find the segments to which this applies, plus an explanation.
- [CO₂ emissions](https://docs.altum.ai/english/sustainability/sustainability-api-v2-delta/co-emissions.md): CO₂ calculation
- [Frequently Asked Questions (FAQ)](https://docs.altum.ai/english/sustainability/sustainability-api-v2-delta/frequently-asked-questions-faq.md)
- [Sustainability API v2 Delta for Apartments](https://docs.altum.ai/english/sustainability/sustainability-api-v2-apartments-delta.md): The Sustainability Delta API bridges technical upgrades with financial impact, enabling data-driven sustainability decisions across the Dutch housing ecosystem.
- [Changelog](https://docs.altum.ai/english/sustainability/sustainability-api-v2-apartments-delta/changelog.md): Changelog of the deploy of the Sustainability API in format iteration (1.01) and (expected) release date (year, month and day).
- [Authentication, input and response](https://docs.altum.ai/english/sustainability/sustainability-api-v2-apartments-delta/authentication-input-and-response.md)
- [API Key Information](https://docs.altum.ai/english/sustainability/sustainability-api-v2-apartments-delta/api-key-information.md): Understanding and Obtaining Your API Key
- [Energylabel](https://docs.altum.ai/english/sustainability/sustainability-api-v2-apartments-delta/energylabel.md): Explanation of the different energylabel inputs and outputs
- [Improving the advice TBA](https://docs.altum.ai/english/sustainability/sustainability-api-v2-apartments-delta/improving-the-advice-tba.md): The Sustainability Delta API offers a lot of functions to improve the output from customers- and/or suppliers perspective. This page explains the different functions
- [Example API calls](https://docs.altum.ai/english/sustainability/sustainability-api-v2-apartments-delta/example-api-calls.md): A collection of example API calls to the service.
- [Output interpretation](https://docs.altum.ai/english/sustainability/sustainability-api-v2-apartments-delta/output-interpretation.md): An explanation and interpretation of every feature outputted in the API response.
- [Increasing energy costs TBA](https://docs.altum.ai/english/sustainability/sustainability-api-v2-apartments-delta/increasing-energy-costs-tba.md): How to use the API to adjust the calculations based on current or expected energy costs for gas and electricity.
- [Exclude measures TBA](https://docs.altum.ai/english/sustainability/sustainability-api-v2-apartments-delta/exclude-measures-tba.md)
- [Measures](https://docs.altum.ai/english/sustainability/sustainability-api-v2-apartments-delta/measures.md): Provides a detailed overview of various measure codes related to the sustainability aspects of buildings.
- [Measure filters](https://docs.altum.ai/english/sustainability/sustainability-api-v2-apartments-delta/measure-filters.md): Provides a detailed overview of various measure filters.
- [Insulation values](https://docs.altum.ai/english/sustainability/sustainability-api-v2-apartments-delta/insulation-values.md): Regarding the measures for insulation for the wall, roof and floor the specifications are found below.
- [Comfort score TBA](https://docs.altum.ai/english/sustainability/sustainability-api-v2-apartments-delta/comfort-score-tba.md): A comfort score is calculated for each home based on the home characteristics.
- [Warnings](https://docs.altum.ai/english/sustainability/sustainability-api-v2-apartments-delta/warnings.md)
- [CO2](https://docs.altum.ai/english/sustainability/sustainability-api-v2-apartments-delta/co2.md): CO2 calculation
- [Coverage](https://docs.altum.ai/english/sustainability/sustainability-api-v2-apartments-delta/coverage.md): Unfortunately, it is not possible to (accurately) calculate the sustainability measures for all homes in the Netherlands. Below you will find the segments to which this applies, plus an explanation.
- [Cost indicators](https://docs.altum.ai/english/sustainability/sustainability-api-v2-apartments-delta/cost-table-input.md): Depending on the supply chain partner handling the installation of measures it is possible to overwrite default values in regards to costs and calculations when given as input.
- [Improvement costs TBA](https://docs.altum.ai/english/sustainability/sustainability-api-v2-apartments-delta/cost-table-input-1.md)
- [Frequently Asked Questions (FAQ)](https://docs.altum.ai/english/sustainability/sustainability-api-v2-apartments-delta/frequently-asked-questions-faq.md)
- [Solar panel roof scan API](https://docs.altum.ai/english/sustainability/solar-panel-roof-scan-api.md): Calculates the optimal layout of solar panels in terms of count, position etc. considering the rooftop's orientation and geometry. Additionally, it creates temporary image URLs of these simulations
- [Authentication, input and response](https://docs.altum.ai/english/sustainability/solar-panel-roof-scan-api/authentication-input-and-response.md)
- [API Key Information](https://docs.altum.ai/english/sustainability/solar-panel-roof-scan-api/api-key-information.md): Understanding and Obtaining Your API Key
- [Output interpretation](https://docs.altum.ai/english/sustainability/solar-panel-roof-scan-api/output-interpretation.md): An explanation and interpretation of every feature outputted in the API response.


---

# Agent Instructions: Querying This Documentation

If you need additional information that is not directly available in this page, you can query the documentation dynamically by asking a question.

Perform an HTTP GET request on the current page URL with the `ask` query parameter:

```
GET https://docs.altum.ai/english/sustainability.md?ask=<question>
```

The question should be specific, self-contained, and written in natural language.
The response will contain a direct answer to the question and relevant excerpts and sources from the documentation.

Use this mechanism when the answer is not explicitly present in the current page, you need clarification or additional context, or you want to retrieve related documentation sections.