Yes, for most houses, though Coulsdon has more heritage protection than its rows of semis suggest. It has more than a hundred listed buildings. Ten conservation areas lie in and around it. Seven scheduled monuments, including Anglo-Saxon barrows on Farthing Downs, are close by. The neighbours keep extending anyway, at a rate of hundreds of planning applications a year.
There are 115 listed buildings in the area, three of them Grade I, five Grade II* and 107 Grade II. Listing covers the whole building, inside and out, so replacing windows, removing a wall or adding a rear extension to a listed house needs listed building consent on top of any planning permission. Most of those 115 are Grade II, the most common tier, and that tier is where most owners find out how far the protection goes.
Ten conservation areas fall in and around Coulsdon, including Bradmore Green, Kenley Aerodrome, Netherne-on-the-Hill and two in Chipstead, at Elmore Road and High Road. In a conservation area, changes that would elsewhere need no application can require one, and demolition, side extensions, front-facing alterations and work on trees all get a closer look. Those areas are also split between two councils. Coulsdon and Old Coulsdon are in the London Borough of Croydon, while Chipstead, Hooley and Netherne-on-the-Hill are in Reigate and Banstead in Surrey. The same loft conversion can be decided by different officers working to different local plans depending on which side of the boundary the house falls.
Seven scheduled monuments lie in and around the area, the strictest protection there is, and they mainly matter to anyone whose land touches one. The earthworks of the Surrey Iron Railway are among them, so a stretch of old embankment near Lion Green Road has stronger legal protection than any house in town.
People extend here constantly. Between April 2024 and June 2026, 977 planning applications were made in the area, 402 of them in the last twelve months. That is the steady activity of a suburb built mostly of semis on decent plots, where the usual answer to needing more space is building out the back.
Outside listed buildings and conservation areas, many rear extensions, loft conversions and outbuildings can go ahead under permitted development rights without a full application, within national size limits. Inside a conservation area those rights are narrower, and for a listed house they barely apply at all. Find out which council covers the house and whether it is in a conservation area before drawing up any plans, because that one check decides whether an extension needs a householder application or a long round of consents.
Coulsdon is harder to extend in than its suburban look suggests. An ordinary semi has room to grow, but listed houses, conservation-area streets and the Surrey villages come with a lot of paperwork.