Realitetsdata

Realitetsdata is a term used in Danish-speaking contexts to denote data about real property assets. It encompasses information about physical properties such as land parcels and buildings, including addresses, size, age, and construction type, as well as ownership, rights and restrictions (mortgages, liens, easements), value and taxation (assessments, market values), and transaction histories (sales prices and dates). Realitetsdata may also cover regulatory status such as zoning, building permits, and planning permissions. The data is used by real estate professionals, financial institutions, public authorities, researchers, and consumers.

Major sources of realitetsdata include public land registries and cadastre systems, tax and valuation databases, mortgage registries, planning and building permit registers, and commercial property listings and appraisal databases. Data are often linked through property identifiers and addresses and can be enriched with geographic information system (GIS) data to enable spatial analysis.

Applications of realitetsdata include market analysis and price benchmarking, due diligence in property transactions, risk assessment for lenders, property taxation, and urban or regional planning. Researchers and policymakers also use it to study housing markets, land use, and development trends.

Access and quality vary by jurisdiction. Some datasets are open and publicly accessible, while others are licensed from government or private providers. Data quality concerns include timeliness, completeness, and accuracy, as well as inconsistent definitions across registries. Privacy and data protection rules, such as GDPR in the EU, govern sharing of owner-identifying information and other sensitive details. Interoperability is pursued through standardized identifiers and GIS formats, though implementations differ. Emerging trends include APIs for real-time updates, integration with related data domains, and analytics-driven insights, alongside ongoing challenges in cross-border harmonization and privacy protection.