25 Grange Avenue, Barnet, London, N20 8AA
About 25 Grange Avenue
25 Grange Avenue is a six-bedroom detached house in Barnet, London, London (N20 8AA). It has a recorded floor area of 227 m² (around 2443 sq ft), construction records dating it to 1983-1990 and council tax band H. The latest certificate (September 2023) shows a C (score 69), just inside the C band. When first surveyed in March 2010 the rating was D, the property has climbed 1 band since. Between certificates, lighting went from Very Poor to Very Good.
At 227 m² it sits well below the postcode median (474 m² across 9 EPCs), making it one of the more compact homes locally. 6 planning records sit against the property, 1 approved, 3 refused. Past consents include an extension, a loft conversion and a basement excavation, meaningful when judging how the property has evolved. Across 1996–2013, sale prices on this property compounded at 8.4% per year. Today's modelled estimate of £2,289,000 is 23.7% above the 2013 sale price. On a £-per-square-foot basis, the last sale (£757/sq ft) was about 49.6% above the typical sold price in the postcode. Last changed hands 13 years ago, in May 2013.
What this property has
Inside
- Bedrooms6
- Bathrooms3
- Dining roomYes
- Utility roomYes
- CloakroomYes
- EnsuiteYes
Energy performance
25 Grange Avenue's carbon output runs well above what efficient homes in the postcode produce.
EPC Rating
Property Improvements
Changes detected from historical EPC data
Heating controls upgraded for better temperature management
More low energy lighting installed
Get a survey for this property
Level 3 Building Survey
Because the property has been extended more than once, we believe a Level 3 building survey should be considered.
From £1,945 · Includes VAT
Planning history
- May 2010Loft ConversionFullIn report
Extension: Rear of property
Extensions to roof including increase in ridge height, 2 dormer windows (1 front, 1 rear), 6 rooflights (4 front, 3 rear) and new inset balcony to rear to facilitate a loft conversion. Formation of new basement level. Part single, part two storey front extension. Part single, part two storey rear extension including first floor balcony. New paved terrace to rear including 3 basement rooflights and swimming pool plant enclosure.
- Agent
- Transformation Architects.
ExtensionBasement- Documents
- 6 docs on file
- Reference
- B/00960/10
- Jan 2010Loft ConversionFullIn report
Extension: Part single, part two storey · Rear of property
Extensions to roof including increase in ridge height, 2 dormer windows (1 front, 1 rear), 5 rooflights (2 front, 3 rear) and new inset balcony to rear to facilitate a loft conversion. Formation of new basement level. Part single, part two storey front extension. Part single, part two storey rear extension including first floor balcony. New paved terrace to rear including 3 basement rooflights and swimming pool plant enclosure.
- Agent
- Transformation Architects
ExtensionBasement- Documents
- 3 docs on file
- Reference
- B/04374/09
What's in 25 Grange Avenue, Barnet, London, N20 8AA's planning history?
4 more on this property, plus refusals, disputes and full decisions nearby, in the report.
Sales history & valuation
Sale price has grown by over 3x since 1996.
£2,289,000
Modelled from EPC, postcode comparables and a sale-price growth of 8.4% per year over 17 years.
£1,850,000
Growth on file: 8.4% per year over 17 years.
Sales timeline
19 May 2013Most recent
£1,850,000
+285.4%over 16 years2 September 1996
£480,000
Median price across the last 5 sales in N20 8AA: £3,000,000 (2024–2015).
Nearby sales in N20 8AA
9 Grange Avenue, Barnet, London, N20 8AA
Sold May 2024
£3,900,00011 Grange Avenue, Barnet, London, N20 8AA
Sold Nov 2022
£4,700,00019 Grange Avenue, Barnet, London, N20 8AA
Sold Sept 2017
£2,200,0005 Grange Avenue, Barnet, London, N20 8AA
Sold Mar 2015
£3,000,0003 Grange Avenue, Barnet, London, N20 8AA
Sold Dec 2013
£2,525,000
Versus other Grange Avenue homes
On floor area, 25 Grange Avenue runs well behind the street norm.
Price per m²
£8,150
Street avg £6,432
Floor Area
227 m²
Street avg 441 m²
Habitable Rooms
10 rooms
Street avg 10 rooms
CO₂ Emissions
7.2 t/year
Street avg 13.7 t/year
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The neighbourhood at a glance
Reported crime in the wider district is trending notably upward year-on-year.
Crime
4/mo
Rising year-on-year across the wider district.
Nearest stop
0.3 km
Grange Avenue (N20) — bus stop.
Closest school
0.6 km
The Totteridge Academy. 24 schools nearby.
Go deeper on the local area
The full report breaks down crime, transport links, schools and air quality in depth.
Road noise across the postcode

Daytime· 07:00 – 23:00
44.8dB

Night-time· 23:00 – 07:00
38.7dB







