Ultra-wealthy Londoners were burrowing into the grounds of Notting Hill, angering merely wealthy Londoners with the sounds of drills and hammers creating new bedrooms and gyms in luxurious two- and three-level basements. One construction contractor estimated that his work would take one home’s value to over $5 million. City planners in the nearby Borough of Kensington and Chelsea halted construction of triple basements in light of complaints.
