Yes, for most Banstead homes. The heritage list is short. Only one corner of town is a conservation area. Hundreds of planning applications go in every year. The paperwork is light, and the ground under the house deserves more attention than the planning officer.
Banstead has 18 listed buildings: none at Grade I, two at Grade II* and 16 at Grade II. Listing covers the whole building, inside and out, so altering one needs listed building consent on top of any planning permission, and changes that would be routine elsewhere become negotiations. With 18 in the whole town, most owners will go their entire time here without meeting a conservation officer.
There is one conservation area, Park Road and Mint Road. Inside its boundary the council looks harder at anything visible from the street, including demolition, front extensions and the materials used. Some work that would be automatic elsewhere needs an application here. The council's conservation area map shows whether a particular house is inside the line, and it is worth checking early, because the boundary follows the council's drawing and ignores where the road changes character.
The area also has two scheduled monuments, the strictest tier of protection, which mostly matters to anyone whose land runs up to one.
Reigate and Banstead received 757 planning applications for the area between April 2024 and June 2026, and 356 in the last twelve months of that period. The count includes everything from loft conversions to tree works, and it says nothing about how many were approved. Hundreds of households are building something, and the neighbours have plainly decided the answer is yes.
The ground needs more thought. The British Geological Survey puts Banstead's shrink-swell hazard at class 3 at its worst, on about 18% of postcodes, which means clay that swells when wet and shrinks when dry, particularly near thirsty trees. On that ground an extension usually needs deeper foundations and a structural engineer's view before the builder prices it. Dissolution of soluble rock, also class 3, covers about 83% of postcodes. On chalk that can mean hidden hollows, which a ground investigation is there to find. The chalk that puts Banstead on top of the North Downs is also why an engineer gets a say in the back extension.
For most homes outside the conservation area and off the listed register, a modest rear extension or loft conversion can go ahead under permitted development, the national allowance that needs no planning application. Anything bigger, at the front, or on a listed building or inside Park Road and Mint Road, goes to the council. Building regulations apply either way, and on this ground the foundations are the part an inspector will look at.
Freedom to extend in Banstead is middling. Heritage rules are light across most streets, and the real constraints are the clay, the chalk and one small conservation area.