Yes, and your neighbours already are. Heritage protection barely touches the village. There's no conservation area. Hundreds of planning applications went in over two years. The heritage rules won't stop you. The clay underneath might have opinions.
Send has 24 listed buildings. None is Grade I, one is Grade II* and the other 23 are Grade II. Owning one of those 24 changes things: works that affect a listed building's character, inside or out, need listed building consent on top of any planning permission, and the replacement windows and open-plan kitchen become a negotiation. For the rest of the village's housing, listing doesn't come into it. There are no conservation areas, so the extra controls on demolition, trees and street-facing changes that apply in many Surrey villages don't apply here.
There's one scheduled monument in the area, the strictest tier of protection. It matters mainly if your land sits next to it, and for most homes it won't.
The planning register shows what people actually do with their houses. There were 609 applications between April 2024 and June 2026, and 272 in the last twelve months of that window. That's a village steadily adding kitchens, loft rooms and garages that turn into something else. Volume isn't approval, and the register doesn't say how those applications ended. It does show that altering a house here is normal, not exotic.
The ground is the real constraint. The British Geological Survey's shrink-swell hazard reaches class 3 here, and about 85% of postcodes reach that class or higher. Shrink-swell clay expands when wet and shrinks when dry, and it takes trees, drains and dry summers personally. For an extension that means deeper foundations than a builder might quote by default, and a structural engineer's view before the plans are fixed, not after the first crack. Pay for it in the design stage, not the remediation stage.
For a typical post-war house or bungalow, not listed and not in a conservation area, many modest rear extensions and loft conversions can fall within national permitted development rights, which means no full planning application. The limits depend on the house type and on anything already built, and some houses have had those rights removed by earlier conditions. Check with Guildford Borough Council before assuming. Anything bigger goes through a normal application, alongside the 272 others in the queue each year.
Your freedom to extend in Send is one of its real strengths. Heritage rules only bite on 24 buildings, and the main thing standing between most owners and a bigger kitchen is the depth of the footings.