The dataset provides detailed information on greenhouse gas emissions from Spanish one-person households between 1998-2019, broken down by direct and indirect emissions across 12 COICOP product categories. The data was constructed under environmental extended input-output framework and based on public databases, including Spanish Input-Output Tables, Supply and Use Tables, Environmental Accounts, and the Household Budget Survey from the Spanish Statistical Insitute (INE). To link sectoral indicators from the Input-Output Tables with household-level data from the Household Budget Survey, a supplementary bridge matrix was utilized from Denmark Statistik