Every figure on this site gets recalculated monthly from live listings, which means we can now answer a question a single snapshot never could: which UK postcodes actually moved this month, not just which ones have a high or low yield right now.
The biggest movers, month over month
L7, in Liverpool, moved from 10.5% to 15.5% gross yield, the biggest genuine gain we found this month. RG20 climbed from 4.0% to 7.2%. On the other side, NR33 (Lowestoft) dropped from 15.0% to 6.0%, and GU20 (Camberley area) fell from 7.7% to 3.8%.
Why some of the biggest "moves" aren't real
Before publishing this list, we found a handful of postcodes showing apparent swings of 30-40 percentage points in a single month, which turned out to be a data quality problem, not a real market shift. One postcode's average rent came out at £10,000 a month one month and corrected to a believable figure the next, almost certainly a holiday-let or serviced-accommodation listing getting priced weekly or seasonally rather than monthly and slipping past our filters. We've excluded anything where either month's yield looks implausibly high (above 20%) from this list specifically, since a genuine UK postcode very rarely sits above that, and a bigger sample size doesn't fix a contaminated figure, it just makes it look more credible.
That leaves the moves above as the real ones: not enormous swings, but genuine, and worth noticing precisely because they're plausible rather than shocking.
Why a single month's move is a starting point, not a verdict
A single month-over-month change can reflect real market movement, but it can also reflect normal listing turnover, especially in postcodes with a smaller sample of live listings. Treat this list as somewhere to look closer, not as a verdict on any one postcode. Check the individual district's own page for its fuller history and current sample size before acting on a single month's swing.
See the full biggest yield gainers and biggest yield drops rankings, or run your own numbers with the buy-to-let cashflow calculator.
Figures are gross averages from live market listings as of publication, comparing the two most recent calendar months of data. Not a forecast or a valuation of any individual property. Not financial advice.