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Get started27 Astell Street is a mid-terrace house in Kensington And Chelsea, London, London (SW3 3RT). It has a recorded floor area of 411 m² (around 4424 sq ft), construction records dating it to 1930-1949 and council tax band H. The latest certificate (April 2016) shows a C (score 73). When first surveyed in November 2008 the rating was E, the property has climbed 2 bands since. Between certificates, wall efficiency went from Very Poor to Average, roof efficiency went from Poor to Average and window efficiency went from Poor to Good. The latest certificate is from April 2016, so improvements made since then won't be reflected.
Sale prices here have outpaced London HPI: 20.7% per year against 0% for the wider region. Today's modelled estimate of £11,015,000 is 25.2% above the 2014 sale price. On a £-per-square-foot basis, the last sale (£1,989/sq ft) was about 36.1% above the typical sold price in the postcode. At 411 m² the property is well over the postcode median (248 m² across 10 EPCs), placing it in the larger end of the local stock. Its energy rating outperforms most of the postcode (better than 80% of similar EPCs). 9 planning records sit against the property, 7 approved, 2 refused. Past consents include a basement excavation and an extension, meaningful when judging how the property has evolved. Last changed hands 12 years ago, in February 2014.
27 Astell Street's carbon output runs well above what efficient homes in the postcode produce.
This certificate is over 10 years old and is no longer valid.Expired 14 Apr 2026
27 Astell Street has been through 7 approved planning applications — a well-evolved property.
Removal of condition 6 (Applicable EcoHomes Standards) of planning permission PP/14/04288 (Excavation of basement) as EcoHomes Certificate is no longer a legal requirement in regards to planning permission
Latest sale on 27 Astell Street was the highest on Land Registry record across the postcode.
£11,015,000
Modelled from EPC, postcode comparables and a sale-price growth of 20.7% per year over 4 years.
£8,800,963
Growth on file: 20.7% per year over 4 years.
Everything we know about this property, compiled into one in-depth, downloadable report.
On epc rating, 27 Astell Street stands well clear of the street.
Price per m²
£21,414
Street avg £19,807
Floor Area
411 m²
Street avg 244 m²
CO₂ Emissions
8.5 t/year
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
Heating controls upgraded for better temperature management
Hot water efficiency improved
Windows upgraded, improving insulation
Heating controls changed
Wall insulation improved
Roof insulation improved
Floor insulation added or improved
Are we missing something? Tell us about home improvements to help adjust your valuation.
Construction of electric gates on driveway.
7 more applications for this property
Join to see all planning history.
5 February 2014Most recent
£8,800,963
+122.8%over 4 years2 November 2009
£3,950,000
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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Street avg 8.8 t/year
Years Held
12 years
Street avg 10 years
SW3 3JE
Closest school
0.2 km
Oratory Roman Catholic Primary School. 56 schools nearby.
Night-time· 23:00 – 07:00
46.6dB