While the listing price of £900,000 seems within the range of similar properties in the area (considering other nearby listings and the size of the property), a definitive assessment of value would require detailed information on the square footage of comparable properties and current market conditions in Belsize Park which is not provided. However, given that the property is an apartment without outdoor space, the price may be at the higher end of what some buyers would consider reasonable.

Based on the photos, the property appears to be in good to excellent condition. It has been recently modernised with a contemporary kitchen and bathroom, and the living spaces seem well-maintained and tastefully decorated. There is no indication of significant repairs or renovations needed.

Belsize Park in NW3 is a highly desirable and sought-after residential area in London. It benefits from excellent transport links (though not immediately adjacent to a tube station), a wide range of amenities including shops, restaurants and cafes on Englands Lane itself, and proximity to Hampstead Heath. The presence of well-regarded schools nearby further enhances its appeal for families. The street itself shows a nice mix of businesses and residences.

The property has virtually no outdoor space, which is a significant drawback in a densely populated area like London. The lack of a garden or even a balcony is reflected in the low score.