Yes, across most of Snodland, as long as your house isn't in one of its older corners. Listed buildings are thin on the ground. Two conservation areas cover the historic cores. The neighbours are putting in planning applications all the time. The red tape here is concentrated in a few places rather than spread over the whole town.
Snodland has 28 listed buildings: two at grade I, two at grade II* and 24 at grade II. Listing covers the whole building, inside and out, so changes that affect its character need listed building consent as well as any planning permission. Grade I and II* are the top tiers and get the closest attention. For 24 of the 28, grade II is the working reality, which still means a conversation with the council before anyone touches a window frame. Buy a listed house for its beams and you have also bought a lot of paperwork about the beams.
There are two conservation areas, Snodland and Holborough Mill. Inside them, the council takes a closer interest in how things look from the street, and changes that would pass without comment on an ordinary close can need consent. Check the boundary against the exact address, not the postcode, because the line doesn't care which side of the road your estate agent thought you were on.
There is one scheduled monument, the Roman villa near the church. That is the strictest level of protection there is, and it matters mainly to anyone with land beside it. Nobody on a post-war estate is going to dig up a mosaic putting in a patio.
The council's planning register holds 2,077 applications between April 2024 and June 2026, with 906 of them in the last twelve months. That's the clearest sign that people here alter their homes as a matter of routine. The volume says nothing about how many were approved, so don't read it as a promise, only as proof that the queue is full of people with the same idea.
One listed building in the area is on Historic England's Heritage at Risk register. That means its condition gives cause for concern, and any repair is likely to attract both grant interest and close scrutiny. It's a problem for that building's owner, not for someone buying an ordinary house down the road.
In practice, most houses outside the conservation areas and away from the listed buildings will fall under the normal national rules, where many modest extensions count as permitted development and need no full application. Inside a conservation area, or on a listed building, assume you need consent until the council says otherwise. Ask for the planning history of the house before you exchange, because a previous owner's unauthorised conservatory becomes your problem the day you get the keys.
Your freedom to extend in Snodland is about average: open enough across most of the town, tight in the historic cores. Know which kind of street you're buying on before you sketch the extension.