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Get started23 Astell Street is a five-bedroom mid-terrace house in Kensington And Chelsea, London, London (SW3 3RT). It has a recorded floor area of 271 m² (around 2917 sq ft), construction records dating it to 1900-1929 and council tax band H. The latest certificate (January 2022) shows a D (score 64), on the cusp of jumping into the C band. The recommended improvements would lift it to B (score 84), a 2-band jump. Period features are noted in the property record.
Sale prices here have outpaced London HPI: 5.3% per year against 0% for the wider region. Today's modelled estimate of £5,398,000 is 14.3% below the 2022 sale of £6,300,000, an unusual pattern given regional price growth and worth checking against the EPC condition. On a £-per-square-foot basis, the last sale (£2,160/sq ft) was about 49.5% above the typical sold price in the postcode. 5 planning records sit against the property, 1 approved, 0 refused. Past consents include an extension and a conservatory, meaningful when judging how the property has evolved. Most recent transfer: June 2022 at £6,300,000. That sale was during the post-pandemic price surge, when transactions cleared materially above pre-2020 trend.
23 Astell Street's carbon output runs well above what efficient homes in the postcode produce.
23 Astell Street has an approved rear extension on the planning record.
FELL - or -Prune 1 x Pseudoacacia tree in rear garden.
Sale price has at least doubled since 2004.
£5,398,000
Modelled from EPC, postcode comparables and a sale-price growth of 5.3% per year over 18 years.
£6,300,000
Growth on file: 5.3% per year over 18 years.
Everything we know about this property, compiled into one in-depth, downloadable report.
Years Held for 23 Astell Street lags the street by a wide margin.
Price per m²
£23,247
Street avg £19,578
Floor Area
271 m²
Street avg 258 m²
Habitable Rooms
8 rooms
Street avg 7 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

FELL 1 x California Lilac (rear garden)
3 more applications for this property
Join to see all planning history.
8 June 2022Most recent
£6,300,000
+157.1%over 18 years20 January 2004
£2,450,000
Median price across the last 5 sales in SW3 3RT: £3,700,000 (2025–2016).
9 Astell Street Kensington And Chelsea London
Sold May 2025
15 Astell Street Kensington And Chelsea London
Sold May 2025
29 Astell Street Kensington And Chelsea London
Sold Sept 2021
31 Astell Street Kensington And Chelsea London
Sold Jul 2019
1 Astell Street Kensington And Chelsea London
Sold Feb 2016
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CO₂ Emissions
9.2 t/year
Street avg 8.7 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