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DA15 is a postcode district in the DA (Dartford) postcode area, covering 5.8 km². Prices, sales and comparisons below are for homes sold in the twelve months to July 2026, from HM Land Registry sales matched to their energy certificate.
In the twelve months to July 2026, homes sold in DA15 (Sidcup and Blackfen) went for a median £5,589 per square metre, -1.7% on the previous twelve months and +10.5% on five years earlier. The median price paid was £459,000, across 322 sales (471 in the twelve months before).
That is 8.4% above the median for the DA postcode area (£5,158) and 12.2% below London as a whole (£6,364), ranking DA15 155th of 219 London postcode districts by price per square metre and 1st of 9 in DA. Closest in price across London: SE7 Charlton (£5,594) and NW4 Hendon (£5,561).
19% of the homes sold were flats or maisonettes and the median home sold had 78 m² of floor space. Flats sold for a median £290,000 and houses for £490,000.
Of the 5 districts bordering DA15, 0 are dearer per square metre. The dearest is DA5 Bexley at £5,458 and the cheapest DA14 Sidcup at £5,160.
| Median £/m² | 12-month change | |
|---|---|---|
| DA15 Sidcup and Blackfen | £5,589 | -1.7% |
| Dartford (DA) | £5,158 | +0.4% |
| London | £6,364 | -2.9% |
Each point is the median price per square metre of the homes sold in the twelve months to that month. Months with fewer than 30 sales in DA15 are left blank.
| Period | 12 months to | Median £/m² | Change to latest |
|---|---|---|---|
| Latest | Jul 2026 | £5,589 | |
| One year earlier | Jul 2025 | £5,688 | -1.7% |
| Five years earlier | Jul 2021 | £5,059 | +10.5% |
| First in the series | Feb 1995 | £926 | +503.6% |
Land Registry sales in DA15 matched to the home's energy certificate, the sales every figure on this page is computed from.
DA15's Location Premium is -22.7%: in CityDataLab's factor model fitted to July 2026, an otherwise identical home (same size, type, age and energy rating) is priced 22.7% less per square metre in DA15 than in a district at the average London district price level.
The model measures a district's location by its median price per m² over the previous twelve months, in standard deviations across London's postcode districts. DA15 sits 0.74 standard deviations below the average district. The Location Premium is the part of a home's price per m² the model puts down to that location; the rest depends on the home itself and on the market as a whole. How each factor's Premium has moved · Price a home with the property calculator.
Districts that share a border with DA15, dearest first.
| District | Median £/m², 12 months | 12-month change | Median price paid | Sales, 12 months | Vs DA15 |
|---|---|---|---|---|---|
| DA5 Bexley | £5,458 | +1.0% | £530,000 | 203 | -2.4% |
| SE9 Eltham | £5,344 | -1.6% | £461,000 | 513 | -4.4% |
| DA16 Welling | £5,315 | +1.0% | £465,000 | 334 | -4.9% |
| DA6 Bexleyheath | £5,200 | +0.3% | £405,000 | 129 | -7.0% |
| DA14 Sidcup | £5,160 | +0.9% | £380,000 | 244 | -7.7% |
Prices are HM Land Registry price paid data for homes sold in DA15, each matched by address to its MHCLG energy performance certificate for the floor area. Price per m² is the price paid divided by that floor area; medians are taken over the twelve months to the month shown, and districts, their postcode area and London are always compared over the same twelve months. Sales without a matched certificate, and non-residential and "other" sales, are not counted. Neighbouring districts are those sharing a border on the postcode district maps by Wikipedia contributors (CC BY-SA 3.0). See how CityDataLab's factor model works.