19 Blackdown Close
SG1 6AY
- Semi-detached
- Freehold
What the sales records show
From an older sale: a rough guide£605,000
Range £514,000 to £696,000
Since last sale
+£429,000
+243.8% since Oct 2001, +5.1% a year
Rank in SG1 6AY
4th of 23
Postcode average £483,217
There is no floor area on record, so this is the home's last sale moved from October 2001 to August 2026 by the official UK House Price Index for North Hertfordshire, with the range widened the older the sale. It cannot see condition, layout or recent work, so it is not a valuation.
In short
19 Blackdown Close is a freehold semi-detached in SG1.
There is no floor area on record, so its last sale has been moved to today by the official price index for North Hertfordshire: £514,000 to £696,000, about £605,000 in the middle.
That makes it the 4th highest of the 23 homes we can compare in SG1 6AY, where the middle figure averages £483,217.
It last sold for £176,000 in October 2001; the price index suggests it has gained about £429,000 since, roughly +5.1% a year.
Across North Hertfordshire, average prices rose 3.1% in the year to August 2026.
Where in the range would yours sell?
Condition and improvements usually decide it, and only someone who sees the home can say.
Lower end
£514,000
Middle
£605,000
Upper end
£696,000
Done work since the records were made? Claim your home and tell us, or ask local agents where yours sits.
Sale history
Every sale of this home registered with HM Land Registry since 1995
| Sold | Price paid | Change | A year |
|---|---|---|---|
| October 2001 | £176,000 | +18.9% | +12.1% |
| April 2000 | £148,000 | First sale | – |
Homes in SG1 6AY
Ranked by what comparable sales show. Choose one to see its page.
- 37 Blackdown CloseTerracedSold Nov 2000 for £158k£641,000#1
- 25 Blackdown CloseSemi-detachedSold Aug 2000 for £157k£621,000#2
- 35 Blackdown CloseSemi-detachedSold Sept 2000 for £156k£609,000#3
- 19 Blackdown Close (this home)Semi-detachedSold Oct 2001 for £176k£605,000#4
- 23 Blackdown CloseSemi-detachedSold Apr 2008 for £273k£529,000#5
- 39 Blackdown CloseDetachedSold Jun 2021 for £450k£518,000#6
- 21 Blackdown CloseSemi-detachedSold Jul 2021 for £435k£515,000#7
- 1 Blackdown CloseSemi-detachedSold Feb 2001 for £133k£510,000#8
- 47 Blackdown CloseTerracedSold Jun 2017 for £400k£510,000#9
- 3 Blackdown CloseSemi-detachedSold Aug 2002 for £169k£501,000#10
- 43 Blackdown CloseSemi-detachedSold Jul 2006 for £242k£500,000#11
- 41 Blackdown CloseSemi-detached · 4 bed · 1,238 sq ftSold Feb 2026 for £500k£476,000#12
- 45 Blackdown CloseTerracedSold Jul 2020 for £380k£473,000#13
- 7 Blackdown CloseTerracedSold Jan 2003 for £160k£461,000#14
- 17 Blackdown CloseTerracedSold Jul 2019 for £368k£460,000#15
- 31 Blackdown CloseSemi-detachedSold Aug 2000 for £114k£449,000#16
- 29 Blackdown CloseTerracedSold Sept 2005 for £201k£441,000#17
- 27 Blackdown CloseSemi-detachedSold Mar 2018 for £351k£430,000#18
- 11 Blackdown CloseTerracedSold Mar 2000 for £92k£402,000#19
- 5 Blackdown CloseSemi-detachedSold Jul 2006 for £190k£393,000#20
- 33 Blackdown CloseSemi-detachedSold Feb 2010 for £190k£381,000#21
- 9 Blackdown CloseTerracedSold Jun 2017 for £288k£367,000#22
- 15 Blackdown CloseTerracedSold Jan 2021 for £274k£322,000#23
Recent sales of semi-detached homes nearby
The closest sales of the same type in the last two years, registered with HM Land Registry. Choose one to see its page.
| Home | Price | Sold | Size | Per sq ft | Away |
|---|---|---|---|---|---|
| 41 Blackdown CloseSG1 6AY · Semi-detached | £500,000 | Feb 2026 | 1,238 sq ft | £404 | < 0.1 mi |
| 88 Blackdown CloseSG1 6AX · Semi-detached | £510,000 | May 2026 | 1,076 sq ft | £474 | < 0.1 mi |
| 50 Blackdown CloseSG1 6AX · Semi-detached | £435,000 | May 2026 | 818 sq ft | £532 | < 0.1 mi |
| 84 Blackdown CloseSG1 6AX · Semi-detached | £385,000 | Mar 2025 | – | – | < 0.1 mi |
| 94 The ChilternsSG1 6AZ · Semi-detached | £330,000 | Mar 2025 | – | – | < 0.1 mi |
| 8 The ChilternsSG1 6AZ · Semi-detached | £361,000 | Mar 2025 | 786 sq ft | £459 | < 0.1 mi |
| 7 The ChilternsSG1 6BA · Semi-detached | £415,000 | Mar 2026 | 883 sq ft | £470 | 0.1 mi |
| 9 The ChilternsSG1 6BA · Semi-detached | £405,000 | Nov 2024 | – | – | 0.1 mi |
| 68 Grampian PlaceSG1 6DR · Semi-detached | £425,000 | Apr 2026 | 1,270 sq ft | £335 | 0.1 mi |
| 16 Grampian PlaceSG1 6DR · Semi-detached | £435,000 | Mar 2026 | 1,055 sq ft | £412 | 0.1 mi |
| 18 Grampian PlaceSG1 6DR · Semi-detached | £402,000 | Jan 2025 | – | – | 0.1 mi |
| 115 Cleveland WaySG1 6BH · Semi-detached | £420,000 | Apr 2026 | 1,033 sq ft | £406 | 0.1 mi |
What buyers have paid in SG1
Completed sales in the last 12 months, against the 12 months before
| Type | Sales | Average price | Average size | Per sq ft | On the year |
|---|---|---|---|---|---|
| All homes | 335 | £366,976 | 962 sq ft | £378 | −2.2% |
| Flats | 67 | £199,734 | 611 sq ft | £324 | +7.6% |
| Terraced | 156 | £340,116 | 941 sq ft | £378 | −1.5% |
| Semi-detached | 62 | £451,748 | 1,071 sq ft | £425 | +4.2% |
| Detached | 41 | £603,285 | 1,484 sq ft | £416 | −1.0% |
Contains HM Land Registry data © Crown copyright and database right 2026. Licensed under the Open Government Licence v3.0.
Energy performance data © Crown copyright. Licensed under the Open Government Licence v3.0.
Contains HM Land Registry UK House Price Index data © Crown copyright. Licensed under the Open Government Licence v3.0.
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