The asking price of £640,000 seems reasonable for a four-bedroom house in Beckton, considering comparable properties in the area. However, without precise square footage data for comparable properties, an exact price-per-square-foot comparison is not possible, preventing a more precise valuation.

Based on the photographs, the property appears to be well-maintained and in reasonable condition, although some rooms show signs of needing some modernizing or updating. The kitchen and bathrooms appear to be relatively modern, yet other areas might benefit from refurbishment to enhance their appeal to a wider range of potential buyers.

The property is located in Beckton, Newham, which benefits from relatively good transport links and proximity to schools, although the area itself may not be considered among the most desirable in London. Several nearby streets show prices ranging from 229,000 to 650,000, which indicates some variation in property values within the immediate vicinity, suggesting a mix of housing types. Good Ofsted-rated schools are within a reasonable distance, making it suitable for families.

The property includes a garden, which is a positive feature, but the size is not specified, and the images suggest it is relatively small. Considering the average garden size for properties of this type in London, it could be rated slightly above average.