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Get started3 Bellfield Avenue is a five-bedroom detached house in Harrow (HA3 6ST). It has a recorded floor area of 255 m² (around 2745 sq ft), construction records dating it to 1930-1949 and council tax band G. The latest certificate (March 2025) shows a C (score 76), near the top of the C band. The rating has held steady at C across 3 certificates since July 2011. Between certificates, window efficiency went from Average to Good and lighting went from Good to Very Good; while wall efficiency dropped from Good to Poor. The recommended improvements would push it to B (score 83). Other recorded features include outbuildings. Our model identifies extension potential, subject to local planning policy.
Sale prices here have outpaced Harrow HPI: 41% per year against 0% for the wider region. Today's modelled estimate of £1,434,000 sits 55% above the 2015 sale of £925,000. On a £-per-square-foot basis, the last sale (£337/sq ft) was about 20.9% above the typical sold price in the postcode. 9 planning records sit against the property, 5 approved, 1 refused. Past consents include an extension and a porch, meaningful when judging how the property has evolved. At 255 m² it's 21.4% larger than the typical home in the postcode (210 m² median across 11 EPCs). 5 bedrooms is on the larger side for this postcode, where 3 is the typical count. Last changed hands 11 years ago, in June 2015.
A a loft conversion application was refused at 3 Bellfield Avenue in 2024.
Extension: Single storey
Addition of first floor with habitable roof space and side dormers; external alterations
3 Bellfield Avenue valuation sits well clear of the typical sold price in this postcode.
£1,434,000
Modelled from EPC, postcode comparables and a sale-price growth of 41.0% per year over 2 years.
£925,000
Growth on file: 41.0% per year over 2 years.
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EPC Rating for 3 Bellfield Avenue runs comfortably ahead of the street norm.
Price per m²
£3,627
Street avg £4,970
Floor Area
255 m²
Street avg 225 m²
Habitable Rooms
7 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
Loft insulation upgraded to recommended levels
Low energy lighting percentage decreased
More low energy lighting installed
Are we missing something? Tell us about home improvements to help adjust your valuation.
Creation of first floor to bungalow to form two storey dwellinghouse; external alterations
7 more applications for this property
Join to see all planning history.
2 June 2015Most recent
£925,000
+74.5%over 1 year18 October 2013
£530,000
Median price across the last 5 sales in HA3 6ST: £1,575,000 (2024–2018).
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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
5.8 t/year
Street avg 7.6 t/year
HA3 6ST
Closest school
0.6 km
Hujjat Primary School. 27 schools nearby.
Night-time· 23:00 – 07:00
42.6dB