Reclaim Heritage was commissioned by City & Country Mersea Ltd to produce a post-excavation assessment report on the results from excavations at Brierley Paddocks, West Mersea Phase 2.1. Fieldwork was undertaken by CA Heritage between May and November 2021, with finds and environmental assessment completed by archaeology.biz. Excavation revealed settlement activity on the site from at least as early as the Iron Age, through to the 4th century CE in the Roman period. A group of nine probable roundhouse ring ditches were found along with 1,906 sherds of prehistoric pottery. Much of this material dates to the Iron Age and the late Iron Age to early Roman periods, however, some sherds may date to as early as the Bronze Age. During this phase of settlement, the site appears to have been unenclosed and the artefacts assessed indicate these were most likely domestic structures. At some point in the 1st century CE the Iron Age roundhouses were no longer in use and the foci of activity on the site shifted to the south. The Roman period is reported on here in two phases: early to mid-Roman (1st and 2nd century CE) and mid- to late Roman (3rd and 4th century CE). The early to mid-Roman period was characterised by several long linear ditches enclosing land to the south. This developed by the mid- to late Roman period, when further enclosure of land was made to the south and a coaxial field system constructed to the north. A small cemetery containing at least seven individual inhumation graves and some possible cremations was found beyond the edge of the northern boundary ditch. Overall bone preservation conditions were poor with no human remains surviving, however grave good vessels were present in two, as was the soil-stained outline of a coffin with nails. Two large pits of unknown function were investigated and found two contain waterlogged fragments of tool marked timber. Indirect evidence for saltmaking was found across the site in the form of briquetage, suggesting such activities may have been performed in vicinity of the site. Further interaction with the marine environment is demonstrated in the mid- to late Roman period by the discovery of 926 marine molluscs. A considerable quantity of ceramic building material was recorded including roof tiles, bricks, box flues and wall tiles, indicating a substantial farmstead or villa with a hypocaust central heating system existed on or near the southern end of the site.