London's Price Gap: North vs South of the Thames
London's property market is anything but uniform. The Thames has long served as more than just a geographical boundary — it's a dividing line in property values, culture, and aspiration. But what does the data actually show?
The headline numbers
Looking at 2025 data, the average property price in north London postcode districts (N, NW, EC, WC, W) sits at roughly £720,000, while south London districts (SE, SW, BR, CR) average around £530,000. That's a gap of about 36%.
But the gap is shrinking
In 2010, the same gap was closer to 50%. South London has been catching up steadily, driven by regeneration in areas like Brixton (SW2), Peckham (SE15), and the wider SE1 corridor around London Bridge and Bermondsey. These areas have seen price growth of 80-100% over the past decade, outpacing most of their north London equivalents.
The outliers
Of course, averages hide the extremes. SW1 (Westminster/Belgravia) and W1 (Mayfair) remain the most expensive districts in the country, with average prices well above £1.5 million. On the north side, areas like N18 (Edmonton) and N9 (Lower Edmonton) are among the most affordable in London, with averages closer to £350,000.
What's driving the convergence?
Transport links are a major factor. The extension of the Overground, improvements to Thameslink, and the ongoing Bakerloo line extension plans have all made south London more accessible. Add in the cultural shift that's made areas like Peckham and Brixton desirable rather than affordable, and you have a recipe for price convergence.
You can explore these patterns yourself on the heatmap — try switching between 2010 and 2025 to see the shift in action.