The list price of £900,000 seems relatively reasonable considering the location and the presence of a garden. While the property would likely benefit from some modernisation, the price per sqft is not exorbitant when compared to other similar properties in the area. However, a lack of precise sqft data for nearby listings makes direct comparison challenging. Further research into specific comparable properties would be beneficial to gain a more precise valuation.

While the property appears generally well-maintained, some areas show signs of needing updating or modernisation. The kitchen appears functional but dated, and some aspects of the décor and furnishings could be considered tired. The property overall is habitable and does not appear to need significant structural repairs but some cosmetic improvements would be beneficial.

Castelnau, Barnes, is a highly desirable area in London. It benefits from excellent transport links (Barnes station is relatively close), highly-rated schools (Lowther Primary and The Swedish School are within walking distance), and a charming village atmosphere with local shops and amenities. The area is known for its attractive period properties and family-friendly environment, contributing to its high desirability and value.

The property benefits from a significant garden. This is a considerable advantage in London, where outdoor space is often a premium, especially for properties in this price range. The garden appears relatively well maintained and provides a good amount of space for relaxation and enjoyment.