Yes, for most houses, but the older ones come with conditions attached. Forty-five buildings are listed. One conservation area covers the old centre. The neighbours apply for planning permission all the time. Outside the historic core, the builder's van is part of village life.
Lingfield has 45 listed buildings: 3 at Grade I, 8 at Grade II* and 34 at Grade II. Grade I is the top tier nationally, and a village holding three of them plus eight at Grade II* has more heritage than its size would suggest. Listing covers the whole building, inside and out, not just the pretty front. Changes that affect its character need listed building consent as well as any planning permission, and doing the work without it is a criminal offence, not a paperwork slip. If the house you're viewing is one of the 45, the extension conversation starts with the conservation officer, not the architect.
There is 1 conservation area in the area: High Street, Gun Pond and Church Town, around the old centre. Inside it, alterations that would pass without comment elsewhere can need consent, particularly anything visible from the street, and demolition and work to trees face extra checks. The rules are about how the street looks, so the back garden usually gets more freedom than the front elevation. That isn't a guarantee, and it's worth checking.
The area also holds 1 scheduled monument, the strictest tier of protection. It matters mainly if your land borders it, and for most buyers it won't affect anything.
People here extend regardless. Between April 2024 and June 2026, 377 planning applications were lodged across the area, 169 of them in the last twelve months. That is a village where people would rather build a kitchen extension than move three streets away, and where the planning department has plenty to read.
Put simply, most houses outside the conservation area and off the listed register can use permitted development rights for modest extensions, loft conversions and outbuildings, subject to the usual national limits. Inside the conservation area, or in a listed building, expect to need consent for more, and budget time for it. Before committing to a house on the promise of a future extension, check whether it is listed, check whether it falls inside the conservation area boundary, and look up what the neighbours applied for and got.
Freedom to extend in Lingfield is middling. It's easy on the newer streets and hard in the old centre, and the listing record is the first thing to check.