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Blackfen market report DA15 9, Sidcup
The DA15 9 (Blackfen) house price history in full, 1995 to 2026, in cash and in today's money. Everything below comes from 4,718 sales recorded by HM Land Registry in DA15 9 (Sidcup) since 1995, real completion prices from real purchases, alongside the ONS's current rent figures. No valuations, no estimates, no asking prices.
Covers registered sales to 2026 and ONS rents for May 2026. Refreshed monthly as new sales reach the register.
In short: the typical home in DA15 9 (Sidcup) sold for £435,000 in 2026, the median of 51 registered sales, up 12% on five years earlier. The mean was £489,700, and by floor area homes here have averaged about £5,650 per square metre over the last five years. The figures cover 4,718 sales recorded by HM Land Registry since 1995 and refresh with each monthly release: completed sale prices, not valuations or asking prices.
DA15 9 is a postcode sector: one group of streets inside DA15 (Sidcup). This is as local as the public record gets, but sector medians move on fewer sales than a district's, so expect the lines to be lumpier.
Where DA15 9 sits
Shaded by median price on the same scale as the average prices map. Click any shape to open it on the live map with every sale plotted at its address, or zoom in past street level to see the sold homes right here.
DA15 9 sold prices: where the market stands
51 sales were registered in DA15 9 in 2026, and the middle one of them, the median, went for £435,000. The mean works out at £489,700, modestly above it, the usual shape of a market with an expensive tail.
What a square metre costs in DA15 9
Measured by floor area, the last five years of DA15 9 sales average about £5,650 per square metre. Price per square metre is the fair way to compare a one-bed flat with a four-bed house, and it comes from the Energy Performance Certificate on each sold home.
For scale: the England and Wales median is £285,000, so DA15 9 trades 53% above the country as a whole.
A typical DA15 9 home, priced year by year (1995 to 2026)
One line records the median as paid; the other restates every year in today's money via ONS CPIH, the honest measure of getting dearer. Hover for year figures, click the legend to isolate a line.
See this chart as a table
| Year | Median (cash) | Median (today's £) | Sales |
|---|---|---|---|
| 2026 | £435,000 | £435,000 | 51 |
| 2025 | £452,500 | £463,321 | 126 |
| 2024 | £435,000 | £462,494 | 106 |
| 2023 | £435,000 | £477,959 | 85 |
| 2022 | £452,500 | £530,608 | 126 |
| 2021 | £390,000 | £493,790 | 164 |
| 2020 | £380,000 | £493,058 | 123 |
| 2019 | £365,000 | £478,428 | 143 |
| 2018 | £348,500 | £464,557 | 121 |
| 2017 | £361,000 | £492,368 | 116 |
| 2016 | £336,200 | £470,347 | 126 |
| 2015 | £291,000 | £411,183 | 125 |
| 2014 | £265,000 | £375,949 | 147 |
| 2013 | £240,000 | £345,336 | 155 |
| 2012 | £250,000 | £367,969 | 97 |
| 2011 | £234,500 | £354,005 | 110 |
| 2010 | £221,000 | £346,585 | 101 |
| 2009 | £190,500 | £306,230 | 101 |
| 2008 | £218,000 | £357,348 | 96 |
| 2007 | £220,000 | £373,181 | 225 |
| 2006 | £203,000 | £352,382 | 225 |
| 2005 | £195,000 | £347,021 | 157 |
| 2004 | £189,000 | £343,261 | 205 |
| 2003 | £167,000 | £307,654 | 193 |
| 2002 | £140,000 | £263,409 | 244 |
| 2001 | £125,000 | £240,306 | 218 |
| 2000 | £115,000 | £225,688 | 141 |
| 1999 | £88,000 | £175,379 | 214 |
| 1998 | £82,400 | £166,330 | 182 |
| 1997 | £74,000 | £151,759 | 179 |
| 1996 | £66,500 | £140,246 | 177 |
| 1995 | £66,000 | £143,474 | 139 |
In cash terms the typical DA15 9 home went from £66,000 in 1995 to £435,000 in 2026, roughly 7 times the price. Adjusted for inflation it still comes to a real rise of roughly 203%, so homes here got dearer in substance, not only in cash. Measured in today's money the market peaked in 2022; the current median sits about 18% below that. Someone who bought at the 2022 peak has not yet seen that price back in real terms.
Year-on-year change in the DA15 9 median
Each bar is the change on the year before, in cash. The zero line is the boundary between rising and falling.
The strongest year on record here is 2000 (+30.7% on the year before); the weakest, 2009 (−12.6%). Single-year swings like these are why the annualised table below matters more than any one year's headline.
Annualised returns
| Period | Cash, per year | Real terms, per year |
|---|---|---|
| 1 years (since 2025) | −3.9% | −6.1% |
| 5 years (since 2021) | +2.2% | −2.5% |
| 10 years (since 2016) | +2.6% | −0.8% |
| 20 years (since 2006) | +3.9% | +1.1% |
The table annualises median growth over each period, with the real column deflated by ONS CPIH. Smoothing hides the cycle (see the chart above for it), and none of this forecasts: it is the record.
The turnover behind the prices
Sales per year, counted
Annual recorded sales. The post-2008 trough is the financial crisis; treat the final bar as provisional while registrations catch up.
Over the last twelve months of data, 51 sales completed in DA15 9. Like most of England and Wales, turnover never fully recovered from 2008: the market here averaged 201 sales a year before the financial crisis and 99 a year over the last five. Volume matters as much as price: when few homes change hands, the median gets jumpy and a single street can move the figure. The most recent year is always still filling in, because sales appear in the Land Registry weeks or months after completion.
Rents around DA15 9
DA15 9 falls under Bexley, where the ONS puts the average private rent at £1,528 a month (May 2026 figures). Size sets most of the rent: one-beds average £1,221 a month here against £2,413 for four or more bedrooms.
Average monthly rent by size, Bexley
ONS Price Index of Private Rents, May 2026.
£1,528 a month is £18,336 a year, which against the £435,000 median sold price makes a gross yield of 4.2%. Gross means before letting costs, voids, maintenance and tax: treat it as a ceiling. The ONS publishes rents by local authority, so neighbouring districts under the same authority share these numbers.
How DA15 9 trades
This is a thin market: 51 sales in the last twelve months of data. With that few transactions, one street selling well (or one block of cheap transfers) can move the median, so read the year lines as a range rather than a verdict.
Asked and answered: DA15 9 (Blackfen)
Is DA15 9 (Blackfen) a good place to buy a house?
How much did a house sell for in DA15 9 (Blackfen)?
Are property prices falling in DA15 9 (Blackfen)?
Are DA15 9 prices heading up or down?
Nobody can tell you that, and this page will not pretend to. What the record shows: the median is up 12% over five years in cash but down 12% after inflation. If you are weighing a purchase, read the volume chart alongside the price one, and remember that every figure here is a completed sale, lagged by the weeks it takes the Land Registry to register it.
On the market in DA15 today
The live side of the market holds 25 homes at the moment, listed by 8 agents publishing to HomesIndex.
These cover the whole DA15 district, not just DA15 9: live asking prices are collected per district.
16% of what is on the market here is asking below what comparable homes actually sold for. Each listing is compared with recent recorded sales of similar homes nearby.
- East Rochester Way, Sidcup, Kent
- Blackfen Road, Sidcup
- Greenwood Close, Bexley, Sidcup, DA15, Sidcup
"Under comparable sales" compares each asking price with what similar homes nearby actually sold for. It is a starting point for a conversation, not a valuation. Always look at the home itself.
See every DA15 home for sale on the map →
These asking prices come live from estate agents publishing feeds to HomesIndex, refreshed each Monday and Thursday. They are a sample of the market rather than its entirety, and an asking price is not a sale price.
Bedroom by bedroom: DA prices by size
The Land Registry record, split by size: what each kind of home actually sold for across the DA area. Size steps are fiercely local. A third bedroom adds a quarter to the price in some areas and close to four fifths in others, which is why no national rule of thumb survives contact with a real market.
| Type | 1 bed | 2 bed | 3 bed | 4 bed | 5 bed |
|---|---|---|---|---|---|
| Detached | — | £450,000 | £600,000 (+33%) | £800,000 (+33%) | £1,100,000 (+38%) |
| Semi-detached | £341,500 | £410,000 (+20%) | £480,000 (+17%) | £600,000 (+25%) | £712,500 (+19%) |
| Terraced | £312,000 | £364,000 (+17%) | £410,000 (+13%) | £499,997 (+22%) | £630,000 (+26%) |
| Flat | £217,500 | £287,995 (+32%) | £339,997 (+18%) | — | — |
Medians of recorded sales over the last four years, by built form and bedroom count. Sold homes carry no advertised bedroom count, so sizes are estimated from their EPC records; a small number of homes will sit one size out. Where too few homes exist to say anything meaningful, the cell is blank.
The risers and the fallers
The spread across the DA area is the point: the same five years treated these districts very differently.
Five-year change in the median, DA area districts
The biggest risers and fallers in cash terms; every row links to that district's report.
Other sectors in DA15
Prices can differ sharply between two sectors a few minutes' walk apart. The rest of DA15, each linking to its own report:
| Sector | Median (latest) | Sales that year |
|---|---|---|
| DA15 7 | £405,000 | 32 |
| DA15 8 | £470,500 | 62 |
Zoom out to the full DA15 district report for the type split, monthly volumes and how DA15 compares with its neighbours.
Selling a home in DA15 9? Price it on the evidence
The sold record beats any estimate as a starting point. Before a house valuation or flat valuation in DA15 9, open the average prices map and zoom from the DA15 9 shading down to the sold homes on your own street. Every recorded DA15 9 sale is on this page; the same Land Registry record is what agents price from, and it is now in your hands.
Estate agents working DA15 9: the featured spot on this report is free for founding agents, one per district. Claim DA15 9.
Dig further
Answers come from the same Land Registry data behind this report, and the AI knows you are asking about DA15 9. Free, with a one click sign in.
Two maps carry on from here: every DA15 9 sale at its exact address, and the average prices map from area shading down to single homes. The report tool answers a specific question in writing, and each sale's mortgage and rent calculator prices a real purchase.
About the numbers: everything is computed from HM Land Registry Price Paid Data (Crown copyright, OGL v3.0), geocoded to the address; today's-money figures use the ONS CPIH index, and rents are the ONS Price Index of Private Rents by local authority. These are medians of recorded sales, not valuations, and none of it is financial advice.