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Get started3 Astell Street is a five-bedroom end-of-terrace house in Kensington And Chelsea, London, London (SW3 3RT). It has a recorded floor area of 418 m² (around 4499 sq ft), construction records dating it to 1930-1949 and council tax band H. The latest certificate (May 2022) shows a D (score 66), on the cusp of jumping into the C band. When first surveyed in April 2012 the rating was E, the property has climbed 1 band since. Between certificates, wall efficiency went from Very Poor to Poor and lighting went from Very Poor to Very Good. The recommended improvements would lift it to B (score 81), a 2-band jump.
It hasn't traded since April 2002, a hold of 24 years that's notably long for the area. Sale prices here have outpaced London HPI: 34.9% per year against 0% for the wider region. Today's modelled estimate of £9,878,000 sits 229.3% above the 2002 sale of £3,000,000. On a £-per-square-foot basis, the last sale (£667/sq ft) was about 67.1% below the postcode norm. At 418 m² the property is well over the postcode median (248 m² across 10 EPCs), placing it in the larger end of the local stock. 2 planning records sit against the property, 2 approved, 0 refused. Past consents include tree works, a basement excavation and new windows, meaningful when judging how the property has evolved.
3 Astell Street's carbon output runs well above what efficient homes in the postcode produce.
Prune 1 x Cherry Tree (front)
Price for 3 Astell Street has grown more than fourfold since the 1997 starting point.
£9,878,000
Modelled from EPC, postcode comparables and a sale-price growth of 34.9% per year over 5 years.
£3,000,000
Growth on file: 34.9% per year over 5 years.
Everything we know about this property, compiled into one in-depth, downloadable report.
Price per m² for 3 Astell Street lags the street by a wide margin.
Price per m²
£7,177
Street avg £21,587
Floor Area
418 m²
Street avg 243 m²
Habitable Rooms
10 rooms
Rail-style transport is unusually close for this postcode.
Crime
9/mo
Rising year-on-year across the wider district.
Nearest stop
0.2 km
Chelsea Old Town Hall — bus stop.

Daytime· 07:00 – 23:00
56.7dB

Changes detected from historical EPC data
Windows upgraded, improving insulation
Wall insulation improved
More low energy lighting installed
Are we missing something? Tell us about home improvements to help adjust your valuation.
Installation of new windows into existing basement area to the Britten Street and Astell Street elevations involving the formation of three lightwells in the existing garden area.
5 April 2002Most recent
£3,000,000
+1346.9%over 3 years7 April 1998
£207,339
-67.1%over 1 year15 January 1997
£630,000
Median price across the last 5 sales in SW3 3RT: £5,650,000 (2025–2019).
9 Astell Street Kensington And Chelsea London
Sold May 2025
15 Astell Street Kensington And Chelsea London
Sold May 2025
23 Astell Street Kensington And Chelsea London
Sold Jun 2022
29 Astell Street Kensington And Chelsea London
Sold Sept 2021
31 Astell Street Kensington And Chelsea London
Sold Jul 2019
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Full planning history
Every application and decision on record
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Street avg 7 rooms
CO₂ Emissions
13.0 t/year
Street avg 8.3 t/year
SW3 3JE
Closest school
0.2 km
Oratory Roman Catholic Primary School. 56 schools nearby.
Night-time· 23:00 – 07:00
46.6dB