<|start_header_id|>assistant<|end_header_id|> Here is a summary of the property description in a single paragraph: Air space is available for sale with planning permission in the exclusive gated development of Hadley Wood, with a long leasehold interest. The property has prior approval for an additional storey, allowing for a 3-bedroom, 2-bathroom apartment of approximately 195 sq. M / 2099 sq. Ft. The development offers on-site concierge, underground parking, communal garden, and residents' gym, and is situated near Hadley Wood station, providing easy access to central London. The property is being sold with a guide price of £850,000, subject to contract, and is available to view by appointment only.