The asking price of £550,000 seems relatively reasonable compared to other properties in the immediate vicinity, notably some similar properties on the same street, Wharfedale Gardens, listed for similar amounts. However, without precise square footage data for these nearby properties and additional information on property features and specifics, a precise comparison per square foot is difficult. Therefore, the price appears to be in line with the local market trend. The lack of precise square footage and detailed comparisons of features slightly reduces the value score.

Based on the provided photographs, the property appears to be in reasonable condition, though not perfect. The interior shows some minor signs of wear and tear, such as the slightly dated bathroom and minor cosmetic updates needed in several areas. The exteriors look well-maintained, but a full structural survey would be needed for a definitive assessment. Therefore a score of 6 reflects a property in need of some modernisation but overall in good habitable condition.

The property is situated in Wharfedale Gardens, Thornton Heath, which benefits from its proximity to several good schools like Gonville Academy and Winterbourne schools (all within a 1km radius), and relatively easy access to public transport via several Southern train stations (Norbury being the closest). While Thornton Heath might not be considered a top-tier London location, it offers a good balance of amenities and convenience at a more attainable price point than many central areas. The presence of nearby shops and places of significance would need further investigation to refine the score, but based on the immediate vicinity and available data, a score of 7 is appropriate.

The property includes a garden, which is a positive feature, but its size is not specified in the provided data. The photographs show it to be a small to medium sized garden. While a garden adds value, its relative size is modest. Therefore, a score of 4 reflects its presence but not an exceptionally large outdoor space.