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Get started11 Bellfield Avenue is a three-bedroom detached house in Harrow (HA3 6ST). It has a recorded floor area of 210 m² (around 2260 sq ft), construction records dating it to 1950-1966 and council tax band G. The latest certificate (June 2019) shows a C (score 69), just inside the C band. When first surveyed in October 2010 the rating was E, the property has climbed 2 bands since. Between certificates, window efficiency went from Poor to Good and lighting went from Poor to Very Good; while wall efficiency dropped from Poor to Very Poor and roof efficiency dropped from Good to Very Poor.
Sale prices here have outpaced Harrow HPI: 3.2% per year against 0% for the wider region. Today's modelled estimate of £1,200,000 sits 90.5% above the 2012 sale of £630,000. 2 planning records sit against the property, 2 approved, 0 refused. Past consents include an extension and a porch, meaningful when judging how the property has evolved. On the market in June 2012 and unlisted since — roughly 14 years.
11 Bellfield Avenue's carbon output runs well above what efficient homes in the postcode produce.
Extension: Single storey
Single storey front extension incorporating front porch and bay window; single storey side to rear extension and single storey rear extension; two dormers in the front roofslope; rooflight in front roofslope; replacement and installation of windows; exter
11 Bellfield Avenue valuation sits well clear of the typical sold price in this postcode.
£1,200,000
Modelled from EPC, postcode comparables and a sale-price growth of 3.2% per year over 9 years.
£630,000
Growth on file: 3.2% per year over 9 years.
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On price per m², 11 Bellfield Avenue runs well behind the street norm.
Price per m²
£3,000
Street avg £5,040
Floor Area
210 m²
Street avg 229 m²
Habitable Rooms
6 rooms
Crime
5/mo
Steady year-on-year across the wider district.
Nearest stop
0.2 km
Belsize Road — bus stop.

Daytime· 07:00 – 23:00
51.3dB

Changes detected from historical EPC data
Windows upgraded, improving insulation
More low energy lighting installed
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Extension: Single storey · Side of property
Single storey side extension; two front dormers; rooflight in front roofslope
7 June 2012Most recent
£630,000
+31.3%over 8 years4 November 2003
£480,000
Median price across the last 5 sales in HA3 6ST: £1,575,000 (2024–2018).
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Detailed EPC data
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Comparable homes and street-level pricing
Full planning history
Every application and decision on record
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Street avg 8 rooms
CO₂ Emissions
6.7 t/year
Street avg 7.5 t/year
HA3 6DF
Closest school
0.6 km
Hujjat Primary School. 27 schools nearby.
Night-time· 23:00 – 07:00
42.6dB