In Ireland forests cover 11% of the land, making it one of the least forested countries in Europe. The government aims to reach 18% of forest cover by 2050. In doing so, it is key to develop resistant and resilient forests that can provide a wide range of ecosystem services (ES). Coillte, an Irish semi-State company, owns 49% of the forests in Ireland. Originally managed primarily for timber production, they now manage their forests for a range of ecosystem services including timber, carbon sequestration, biodiversity enhancement and recreation. One way to better understand changes in land use and associated ES is through natural capital accounting, and specifically the newly adopted System of Environmental Economic Accounting - Ecosystem Accounting (SEEA EA). The first step in the SEEA EA framework is developing the extent accounts, i.e., the total area of each ecosystem within an ecosystem accounting area. We created the extent accounts for 25 diverse Coillte forest sites throughout Ireland, covering almost 9,000 hectares. We used CORINE land cover data for 2000 (opening extent) and 2018 (closing extent). In the 25 sites combined, there was a decline in coniferous forests (mostly Sitka spruce plantations) of 1,024 hectares (-20.1%), while broad-leaved forests cover increased by 230 ha (+73.2%) and mixed forest cover by 425 ha (+2,500%). Two sites with different management objectives (timber production and nature conservation) will be illustrated as examples. Following, we will produce the condition accounts and we will measure the flows of ecosystem services. This is one of the very first studies where the SEEA EA framework is being applied at a local scale.