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Get started3 Northwick Avenue is a one-bedroom detached house in Harrow (HA3 0AA). It has a recorded floor area of 283 m² (around 3046 sq ft), construction records dating it to 1930-1949 and council tax band G. The latest certificate (June 2016) shows a D (score 57), a step below the typical UK home. The recommended improvements would push it to C (score 77). The latest certificate is from June 2016, so improvements made since then won't be reflected.
At 283 m² the property is well over the postcode median (91 m² across 27 EPCs), placing it in the larger end of the local stock. 1 bedrooms is on the smaller side for this postcode, where 3 is the typical count. 2 planning records sit against the property, 1 approved, 1 refused. Past consents include an extension, solar panel installation and subdivision, meaningful when judging how the property has evolved.
3 Northwick Avenue's carbon output runs well above what efficient homes in the postcode produce.
Council records show a subdivision application — the property's legal arrangement has been altered.
Extension: Side and rear of property
3 Northwick Avenue has no Land Registry sales on file, suggesting it has stayed in the same hands since registration began.
£1,274,000
Modelled from EPC, postcode comparables.
That can mean the property has never traded since the registry began publishing in 1995, was a new build that hasn't been registered yet, or is held in the same hands long-term.
Everything we know about this property, compiled into one in-depth, downloadable report.
Detailed AI analysis
CO₂ Emissions for 3 Northwick Avenue lags the street by a wide margin.
EPC Rating
57 (D)
Street avg 59 (D)
Floor Area
283 m²
Street avg 144 m²
CO₂ Emissions
12.0 t/year
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.

Daytime· 07:00 – 23:00
51.3dB

Conversion of the dwellinghouse into 4 self-contained flats (3 x 2bed and 1 x 3bed) including the demolition of side garage and extension and erection of a single storey side and rear extension, loft conversion including rear dormer balconies, alteration to existing windows and insertion of bay windows to first floor rear elevation, 4 rooflights and the front elevation alterations to include new bay windows, porch, installation of solar panels, bricks slips to external walls and associated car and cycle parking space, bin stores, landscaping and amenity space
Extension: Side and rear of property
Conversion of the dwellinghouse into 4 self-contained flats (3 x 2bed and 1 x 3bed) including the demolition of side garage and extension and erection of a single storey side and two storey rear extension, rear and side dormer windows, 4 rooflights and alterations to the front elevation to include new bay windows, porch, installation of solar panels, bricks slips to external walls and associated car and cycle parking space, bin stores, landscaping and amenity space
Median price across the last 5 sales in HA3 0AA: £695,000 (2024–2016).
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Detailed EPC data
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Related properties
Comparable homes and street-level pricing
Full planning history
Every application and decision on record
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Street avg 6.5 t/year
Habitable Rooms
11 rooms
Street avg 6 rooms
HA3 0AX
Closest school
0.5 km
Harrow High School. 39 schools nearby.
Night-time· 23:00 – 07:00
42.0dB