SE23 postcode district — Forest Hill, Southwark and Lewisham

The SE23 postcode district in London sits across Forest Hill, spanning the local authority areas of Southwark and Lewisham. It groups thousands of unit postcodes used for addressing and is a practical geography for comparing forest hill property market activity with neighbouring districts. In the 12 months to 28 August 2026, recorded paid sales show an average sold price around £623,814 across 323 transactions in the district. On a year-on-year basis, the average moved about up 5.3% compared with the previous 12 months. The busiest segment was flat / maisonette, with 174 sales in that period—useful context when you compare house prices in SE23 across terraces, flats and houses. Southwark and Lewisham sold prices in the official Price Paid extract reflect completions (not asking prices), so they’re a solid base for research, desk-based due diligence and area IQ-style comparisons. We surface the latest-sale pattern per postcode where a standard paid sale exists in-window.