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Get startedGarden Flat, 17 Cosway Street, Westminster, London, NW1 5NR
About Garden Flat
A plain-English summary derived from public records, EPC certificates, sold prices and local data.
Garden Flat is a semi-detached house in Westminster, London, London (NW1 5NR). It has a recorded floor area of 32 m² (around 344 sq ft) and construction records dating it to before 1900. The latest certificate (July 2023) shows an E (score 47), well below the UK norm with real room to improve. Earlier certificates rated it D (July 2019); the latest reading is one band lower. Between certificates, lighting went from Very Poor to Very Good; while hot-water efficiency dropped from Good to Very Poor and main heating dropped from Good to Very Poor. The recommended improvements would lift it to C (score 69), a 2-band jump. Main heating runs on electricity.
At 32 m² it's 23.8% smaller than the typical home in the postcode (42 m² median across 56 EPCs). On energy efficiency it sits in the bottom 10% of properties in this postcode — significant headroom for improvement. Most recent transfer was March 2025 at £410,000 — fresh data. On a £-per-square-foot basis, the last sale (£1,190/sq ft) was about 93.6% above the typical sold price in the postcode.
Energy performance
Every EPC certificate filed against this property — current rating, recorded improvements, and where there's headroom to reach a higher band.
Garden Flat sits at the bottom of the postcode for energy efficiency — meaningful headroom to improve.
Current Certificate(1 of 2)
Jul 2023
EPC Rating
A
B
C
D
E
E47
F
G
Main Heating
Electric & Gas
Main Fuel
Electric
Hot Water
Very Poor
Windows
Average
CO2 Emissions
2.4 t/year
Occupancy
Rented
Sales history & valuation
Recorded transactions, our model's current estimate, and a quick read on what neighbouring properties have sold for.
Garden Flat valuation sits well clear of the typical sold price in this postcode.
Current estimate
See how we calculated this£430,000
Modelled from EPC, postcode comparables.
Last sold (2025)
£410,000
Recorded with HM Land Registry.
Sales timeline
Versus other Cosway Street homes
Four headline reads against 56 similar flats on this street, drawn from the latest EPC and Land Registry data.
Garden Flat is notably below the street on years held.
Price per m²
£12,813
Street avg £10,738
Floor Area
32 m²
Street avg 47 m²
Habitable Rooms
2 rooms
Street avg 3 rooms
Similar properties nearby
A handful of close matches in the same postcode area, ranked by likeness on bedrooms, type and floor area.
The neighbourhood at a glance
A condensed read of the local area. Each tile links through to the full breakdown on the London district page.
Rail-style transport is unusually close for this postcode.
Crime
18/mo
Rising year-on-year across the wider district.
Nearest stop
0.1 km
Old Marylebone Road — bus stop.
Road noise across the postcode
Modelled day and night-time noise levels around NW1 5NR from Defra's strategic mapping. The pin marks this postcode's centroid.
Daytime· 07:00 – 23:00
62.4dB
Everything within walking distance
Schools, transport stops and scenic spots near this property — 89 points of interest in total.
Beautiful places to visit nearby
Curated scenic spots within reach of this postcode, served by Beautifulplaces.ai. Photography and tagging come from their open dataset.
Common questions
The questions buyers, sellers and homeowners most often ask about Garden Flat, 17 Cosway Street, Westminster, London, NW1 5NR. Each answer is also embedded as structured data for search engines.