Essex Quadrant Rose Croix Chapter meets at The Square at Upminster (formerly Upminster Masonic Centre) in Deyncourt Gardens. The centre is a short walk from Upminster Tube Station on the District Line and also hosts ample parking.
They even have their own Website! https://thesquareatupminster.co.uk/
Deyncourt Gardens, Upminster, Essex, RM14 1DF