East Grinstead’s housing spans close to seven hundred years of building, and the electrics reflect it. The conservation area around the High Street holds timber-framed and Georgian properties where boards have often been fitted wherever there was space, with circuits added piecemeal over decades. The Victorian and Edwardian villas that went up after the railway arrived — along Lingfield Road, Baldwins Hill, and the roads above the town — are frequently on their second or third board, carrying additions for extensions, loft conversions, and garden rooms on protection that was never designed for that load.

The post-war estates around Imberhorne, Estcots, and Dunnings make up a large share of the town’s stock, and those boards increasingly fall short of current 18th Edition standards — single-RCD units and rewireable fuses are still common. Out towards Felbridge, Ashurst Wood, and Forest Row, properties are often older, on longer supply runs, and frequently fed overhead, which makes a Surge Protection Device under Amendment 2 particularly worthwhile given the exposure to lightning-induced voltage spikes. Newer homes are better specified, but most still need an SPD adding, and with a strong commuter population on the London line, demand for EV charger and home office circuits is pushing older boards past what they can safely support.