Yes. Airbnb is legal in London under the Deregulation Act 2015. Homeowners can let their entire property on a short-term basis for up to 90 nights per calendar year without applying for planning permission. Letting a spare room in your home while you live there is also permitted and is not subject to the 90-night cap. Beyond 90 nights per year for whole-property lets, planning permission is required from your local borough council.