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5 planning records
About 21 Northwick Avenue
A plain-English summary derived from public records, EPC certificates, sold prices and local data.
21 Northwick Avenue is a detached house in Harrow (HA3 0AA). It has a recorded floor area of 266 m² (around 2863 sq ft), construction records dating it to 1900-1929 and council tax band F. The latest certificate (July 2017) shows a D (score 62), on the cusp of jumping into the C band. The recommended improvements would push it to C (score 77).
Untraded for 27 years, with the last transfer in November 1999. Sale prices here have outpaced Harrow HPI: 40.5% per year against 0% for the wider region. Today's modelled estimate of £993,000 sits 281.9% above the 1999 sale of £260,000. On a £-per-square-foot basis, the last sale (£91/sq ft) was about 75.6% below the postcode norm. At 266 m² the property is well over the postcode median (91 m² across 27 EPCs), placing it in the larger end of the local stock. 5 planning records sit against the property, 2 approved, 3 refused. Past consents include an extension, meaningful when judging how the property has evolved.
Energy performance
Every EPC certificate filed against this property — current rating, recorded improvements, and where there's headroom to reach a higher band.
21 Northwick Avenue's carbon output runs well above what efficient homes in the postcode produce.
EPC Rating
A
B
C
D
D62
E
F
G
Main Heating
Gas
Main Fuel
Gas
Hot Water
Good
Windows
Average
CO2 Emissions
10.2 t/year
Occupancy
Rented
Planning history
Applications and permits filed against 21 Northwick Avenue, Harrow, HA3 0AA, sourced from the PlanIt planning register.
21 Northwick Avenue has 2 separate extension applications on the council record.
- Jul 2016OutbuildingOutlineRefused
Certificate of lawfulness for proposed single storey detached outbuilding to the rear
Sales history & valuation
Recorded transactions, our model's current estimate, and a quick read on what neighbouring properties have sold for.
21 Northwick Avenue's modelled value sits at over four times its earliest registered sale price (1999).
Current estimate
See how we calculated this£993,000
Modelled from EPC, postcode comparables and a sale-price growth of 40.5% per year over 1 year.
Last sold (1999)
£260,000
Growth on file: 40.5% per year over 1 year.
Sales timeline
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The complete analysis of 21 Northwick Avenue, Harrow, HA3 0AA
Everything we know about this property, compiled into one in-depth, downloadable report.
Detailed AI analysis
Versus other Northwick Avenue homes
Four headline reads against 17 similar houses on this street, drawn from the latest EPC and Land Registry data.
21 Northwick Avenue is notably below the street on price per m².
Price per m²
£977
Street avg £4,353
Floor Area
266 m²
Street avg 145 m²
Habitable Rooms
10 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 Harrow district page.
Rail-style transport is unusually close for this postcode.
Crime
5/mo
Steady year-on-year across the wider district.
Nearest stop
0.1 km
Northwick Park Station — bus stop.
Road noise across the postcode
Modelled day and night-time noise levels around HA3 0AA from Defra's strategic mapping. The pin marks this postcode's centroid.
Daytime· 07:00 – 23:00
51.3dB
Everything within walking distance
Schools, transport stops and scenic spots near this property — 69 points of interest in total.
Common questions
The questions buyers, sellers and homeowners most often ask about 21 Northwick Avenue, Harrow, HA3 0AA. Each answer is also embedded as structured data for search engines.