Are you a property professional?Get qualified leads from motivated homeowners.
Get started31 Northwick Avenue, Harrow, HA3 0AA
1 planning record
About 31 Northwick Avenue
A plain-English summary derived from public records, EPC certificates, sold prices and local data.
31 Northwick Avenue is a detached house in Harrow (HA3 0AA). It has a recorded floor area of 262 m² (around 2820 sq ft), construction records dating it to 1930-1949 and council tax band G. The latest certificate (December 2015) shows a D (score 63), on the cusp of jumping into the C band. When first surveyed in June 2014 the rating was F, the property has climbed 2 bands since. Between certificates, wall efficiency went from Very Poor to Poor, window efficiency went from Poor to Good and hot-water efficiency went from Average to Good. The recommended improvements would lift it to B (score 83), a 2-band jump. The latest certificate is from December 2015, so improvements made since then won't be reflected.
Sale prices here have outpaced Harrow HPI: 36.4% per year against 0% for the wider region. Today's modelled estimate of £1,336,000 is 10.4% above the 2016 sale price. On a £-per-square-foot basis, the last sale (£429/sq ft) was about 25.4% above the typical sold price in the postcode. At 262 m² the property is well over the postcode median (91 m² across 27 EPCs), placing it in the larger end of the local stock. One planning record on file: an extension approved in 2014. Past consents include an extension, meaningful when judging how the property has evolved. Last changed hands 10 years ago, in October 2016.
Energy performance
Every EPC certificate filed against this property — current rating, recorded improvements, and where there's headroom to reach a higher band.
31 Northwick Avenue's carbon output runs well above what efficient homes in the postcode produce.
EPC Expired
This certificate is over 10 years old and is no longer valid.Expired 26 Dec 2025
Planning history
Applications and permits filed against 31 Northwick Avenue, Harrow, HA3 0AA, sourced from the PlanIt planning register.
- Dec 2014ExtensionFullGrant Permission
Extension: Rear of property
Erection of a ground and first floor rear extension, replacement of Juliet balcony to the front of the property, replacement of garage door to front of property, erection of a rear hipped roof extension, insertion of one side rooflight (west elevation), rendering of the side and rear of the property, blocking up of two ground floor and one first floor window on the east side of the property, insertion of rear facing glazed lantern rooflights to dwellinghouse (revised description).
Sales history & valuation
Recorded transactions, our model's current estimate, and a quick read on what neighbouring properties have sold for.
Latest sale on 31 Northwick Avenue was the highest on Land Registry record across the postcode.
Current estimate
See how we calculated this£1,336,000
Modelled from EPC, postcode comparables and a sale-price growth of 36.4% per year over 2 years.
Last sold (2016)
£1,210,000
Growth on file: 36.4% per year over 2 years.
Sales timeline
Full property reportLaunch offer · 33% off
The complete analysis of 31 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.
Habitable Rooms for 31 Northwick Avenue runs comfortably ahead of the street norm.
Price per m²
£4,618
Street avg £3,948
Floor Area
262 m²
Street avg 146 m²
Habitable Rooms
9 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 31 Northwick Avenue, Harrow, HA3 0AA. Each answer is also embedded as structured data for search engines.