{"id":55374,"title":"Mansion tax sparks £247k plunge in Westminster house prices","publisher":"Stockmark.IT","author":"Stockmark.IT Website","published":"2026-07-23T06:16:18+00:00","modified":"2026-07-23T06:16:18+00:00","canonical_url":"https://stockmark.it/mansion-tax-sparks-247k-plunge-in-westminster-house-prices/","markdown_url":"https://stockmark.it/mansion-tax-sparks-247k-plunge-in-westminster-house-prices.md","json_url":"https://stockmark.it/mansion-tax-sparks-247k-plunge-in-westminster-house-prices.json","category":"Mortgage","categories":["Mortgage","Tax"],"featured_image":"https://i0.wp.com/stockmark.it/wp-content/uploads/2026/07/mansion-tax-sparks-247k-plunge-in-westminster-house-prices.jpg?fit=1402%2C1122&quality=89&ssl=1","format":"news","language":"en-GB","content":"The Westminster property market has entered a period of swift revaluation, with the latest data showing a dramatic year on year fall in central London prices. In the year to May 2026, average values in the borough slipped by nearly a quarter, sliding from about £1.08 million in May 2025 to roughly £836,000. The decline, the steepest recorded since Land Registry began compiling house price figures in 1996, underscores how the city’s most expensive streets are being priced into a new era of fiscal and political risk."}