Yes, you can extend a house in Doddinghurst, and the village puts fewer obstacles in the way than its age would suggest. There is no conservation area. A handful of buildings are listed and the rest are ordinary houses. The neighbours are putting in plans at a steady rate. The clay under the village needs more careful handling than the council does.
The national heritage list records 19 listed buildings in Doddinghurst: one at Grade I, none at Grade II*, and 18 at Grade II. Listing covers the whole building, inside and out, and any change that affects its character needs listed building consent on top of any planning permission. That means new windows, an opened-up wall or a rear extension. With no conservation area covering the village, the extra rules stop at those 19 buildings. The list is searchable by address, and checking the house is not on it takes a couple of minutes. In a village of 19 listed buildings and a great many post-war houses, most buyers will find that it isn't.
The planning register shows how keen the village is on building work. Between April 2024 and June 2026, 975 applications were lodged across the area, 439 of them in the latest twelve months. In Doddinghurst, putting in a planning application is close to a hobby.
The ground is a different matter. The British Geological Survey's published shrink-swell hazard class for Doddinghurst is class 3, and every part of the area reaches it. Shrink-swell describes clay soil that swells when wet and shrinks as it dries, moving whatever is built on it. For an extension, that usually means deeper foundations than a builder's first quote allows for, extra care near trees and their roots, and a structural engineer's opinion before the footings go in. It is a design question, and one that has a solution. It is also the one part of the job where Doddinghurst asks more of a builder than the council does.
On ordinary houses in the village, a range of modest extensions and alterations can go ahead under permitted development rights. These are set nationally and allow work within size limits without a full planning application, unless conditions on the house's original permission have taken those rights away. Anything larger goes to Brentwood Borough Council as a normal application, and listed buildings need consent for almost everything. Flats do not carry the same rights as houses.
Freedom to extend or alter a home is one of Doddinghurst's real strengths. Planning restrictions are light, and the clay is the main thing to plan around.