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Get started12a, Cosway Street, Westminster, London, NW1 5NR
5 planning records
About 12a
A plain-English summary derived from public records, EPC certificates, sold prices and local data.
12a is a mid-terrace house in Westminster, London, London (NW1 5NR). It has a recorded floor area of 54 m² (around 581 sq ft) and construction records dating it to 1900-1929. At 54 m² this is the 9th smallest of 13 units on EPC record in the building, where floor areas span 29–72 m². The building's EPC ratings span E to C, with this unit at the top. The latest certificate (May 2023) shows a C (score 70). The rating has held steady at C across 2 certificates since May 2017. Between certificates, window efficiency went from Poor to Good; while hot-water efficiency dropped from Good to Average and main heating dropped from Good to Average. Main heating runs on electricity.
At 54 m² the property is well over the postcode median (41 m² across 56 EPCs), placing it in the larger end of the local stock. 5 planning records sit against the property, 3 approved, 2 refused. Past consents include an extension, meaningful when judging how the property has evolved. On a £-per-square-foot basis, the last sale (£1,001/sq ft) was about 62.9% above the typical sold price in the postcode. Last sale on file: £582,000 in April 2019.
Energy performance
Every EPC certificate filed against this property — current rating, recorded improvements, and where there's headroom to reach a higher band.
Current Certificate(1 of 2)
May 2023
EPC Rating
A
B
C
C70
D
E
F
G
Main Heating
Electric
Main Fuel
Electric
Hot Water
Average
Windows
Good
CO2 Emissions
3.6 t/year
Occupancy
Owner Occupied
Planning history
Applications and permits filed against 12a, Cosway Street, Westminster, London, NW1 5NR, sourced from the PlanIt planning register.
12a has 5 separate extension applications on the council record.
- Jul 2021ExtensionFullGranted
Extension: Single storey · Rear of property
Erection of single storey rear extension at lower ground floor level and associated works to garden.
Sales history & valuation
Recorded transactions, our model's current estimate, and a quick read on what neighbouring properties have sold for.
12a valuation sits well clear of the typical sold price in this postcode.
Current estimate
See how we calculated this£565,000
Modelled from EPC, postcode comparables.
Last sold (2019)
£582,000
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.
12a is notably below the street on co₂ emissions.
Price per m²
£10,778
Street avg £10,830
Floor Area
54 m²
Street avg 46 m²
Habitable Rooms
3 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 12a, Cosway Street, Westminster, London, NW1 5NR. Each answer is also embedded as structured data for search engines.