Yes, most homes in Norwood Green can be extended, as long as the house is not on the green itself or one of the handful of listed ones. Dozens of buildings are listed. Six conservation areas reach into the area, one of them named after the village. Neighbours file planning applications at a steady clip. The rules tighten sharply around the old village core and relax again a few streets away.
Historic England lists 45 buildings in and around Norwood Green: four at Grade I, six at Grade II* and 35 at Grade II. Listing covers the whole building, inside and out, so almost any change that affects its character needs listed building consent from Ealing Council on top of any planning permission. Doing the work without it is a criminal offence, and the liability passes with the house. Whoever owns one of the 45 is the custodian of the building as much as its owner.
Six conservation areas fall within the area's bounds, including Norwood Green itself, St Mark's Church and Canal, Churchfields and Bulls Bridge. Inside them, the council controls demolition, works to trees and some exterior changes more tightly than elsewhere, and householder rights that apply in an ordinary street can be narrower. Ask Ealing Council whether the address is inside a conservation area and whether any extra local restrictions apply, because the answer can change from one side of a road to the other.
There are two scheduled monuments in the area, the strictest level of heritage protection, which matters mainly to anyone whose land borders one.
People here are not shy about building. Ealing logged 793 planning applications in Norwood Green between April 2024 and June 2026, 386 of them in the most recent twelve months. That is a lot of loft conversions, rear extensions and arguments about side returns. The interwar semis behind the green get extended quietly while the houses facing it go through the paperwork.
The British Geological Survey rates shrink-swell clay in Norwood Green at class 3, a moderate hazard, with about 20% of the area at that level. Clay of that kind swells when wet and shrinks when dry, so an extension here may need deeper foundations than the builder's first quote assumed. A structural engineer's view on the foundations is the sensible step for any sizeable extension, and nothing about class 3 makes extending a bad idea.
Six listed buildings in the area are on Historic England's Heritage at Risk register. That means they are in poor condition or under threat, and their repair is likely to draw grant interest and close attention from the council. For the owner of an ordinary house down the road, it changes nothing.
Outside the conservation areas and away from the listed buildings, a typical semi or terrace has the normal permitted development rights for rear extensions, loft conversions and outbuildings, within size limits, with no planning application needed. Inside the conservation areas some of those rights are trimmed, and a listed building needs consent for almost everything. The same project can be a weekend's paperwork on one street and a months-long exchange of drawings on another.
Freedom to extend in Norwood Green is middling. Most streets give you the ordinary rights, the village core gives you a planning officer with opinions, and the clay asks for a deeper trench either way.