21 Gloucester Street, Westminster, London, SW1V 2DB
About 21 Gloucester Street
21 Gloucester Street is a mid-terrace house in Westminster, London, London (SW1V 2DB). It has a recorded floor area of 53 m² (around 570 sq ft), construction records dating it to before 1900 and council tax band E. At 53 m² this is the 19th smallest of 39 units on EPC record in the building, where floor areas span 31–330 m². The building's EPC ratings span F to C, with this unit at the top. The latest certificate (December 2019) shows a C (score 72). When first surveyed in January 2010 the rating was D, the property has climbed 1 band since. Between certificates, lighting went from Very Poor to Average.
Across 2021–2023, sale prices on this property compounded at 26.3% per year. Today's modelled estimate of £816,000 is 10.8% below the 2023 sale of £915,000, an unusual pattern given regional price growth and worth checking against the EPC condition. On a £-per-square-foot basis, the last sale (£1,604/sq ft) was about 118.7% above the typical sold price in the postcode. 4 planning records sit against the property, 2 approved, 1 refused. Past consents include an extension and a basement excavation, meaningful when judging how the property has evolved. At 53 m² it's 23.3% larger than the typical home in the postcode (43 m² median across 83 EPCs). Last sale on file: £915,000 in May 2023.
Know exactly what you're buying at 21 Gloucester Street
Before you offer, see what the listing won't tell you, the true value, the red flags and the full history.
Already flagged here
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Valuation
against the asking price
Risks
planning & flood
Sold prices
similar homes nearby
Trends
the local market
Energy performance
EPC Rating
Property Improvements
Changes detected from historical EPC data
Windows upgraded, improving insulation
More low energy lighting installed
Low energy lighting percentage decreased
Heating controls changed
More low energy lighting installed
Planning history
21 Gloucester Street has 2 separate extension applications on the council record.
- Feb 2011BasementFullIn report
Extension: Single storey · Rear of property
Erection of single storey extension to rear courtyard in connection with basement flat.
- Agent
- Urban Future Organization Ltd
Extension- Documents
- 11 docs on file
- Reference
- 10/11000/FULL
- Feb 2011ExtensionHeritageIn report
Extension: Single storey · Rear of property
Erection of single storey part-glazed extension to rear courtyard in connection with basement flat.
- Agent
- Urban Future Organization Ltd
- Documents
- 2 docs on file
- Reference
- 10/11001/CAC
We flagged 1 thing worth checking at 21 Gloucester Street
Independent checks surfaced things a buyer would want to understand before offering. The report explains each one in full, with the underlying data and what to ask.
- Larger development activity nearby
30-day money-back guarantee
Sales history & valuation
21 Gloucester Street valuation sits well clear of the typical sold price in this postcode.
£816,000
Modelled from EPC, postcode comparables and a sale-price growth of 26.3% per year over 2 years.
£915,000
Growth on file: 26.3% per year over 2 years.
Sales timeline
11 May 2023Most recent
£915,000
+55.1%over 1 year24 June 2021
£590,000
Median price across the last 5 sales in SW1V 2DB: £595,000 (2025–2024).
Nearby sales in SW1V 2DB
Flat 5, 41 Gloucester Street, London, SW1V 2DB
Sold Aug 2025
£1,200,000Flat 4, 31 Gloucester Street, London, SW1V 2DB
Sold Dec 2024
£535,000Third & Fourth Floor Flat, 45 Gloucester Street, London, SW1V 2DB
Sold Oct 2024
£1,250,000Flat 6, 31 Gloucester Street, London, SW1V 2DB
Sold Aug 2024
£405,00013 15, Flat G, Gloucester Street, Westminster, London, SW1V 2DB
Sold May 2024
£595,000
Everything we know about 21 Gloucester Street, in one report
What it's really worth, what could be wrong, and the planning, sales and area data in full.
What we flagged
- Larger development activity nearby

Versus other Gloucester Street homes
Price per m² for 21 Gloucester Street runs comfortably ahead of the street norm.
Price per m²
£17,264
Street avg £10,304
Floor Area
53 m²
Street avg 47 m²
Habitable Rooms
3 rooms
Street avg 2 rooms
CO₂ Emissions
1.7 t/year
Street avg 2.2 t/year
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The neighbourhood at a glance
Rail-style transport is unusually close for this postcode.
Crime
12/mo
Rising year-on-year across the wider district.
Nearest stop
0.1 km
Belgrave Road — bus stop.
Closest school
0.3 km
Pimlico Primary. 69 schools nearby.
Go deeper on the local area
The full report breaks down crime, transport links, schools and air quality in depth.
Road noise across the postcode

Daytime· 07:00 – 23:00
58.7dB

Night-time· 23:00 – 07:00
48.5dB