23a, Sheldon Avenue, Haringey, London, N6 4JS
About 23a
23a is a detached house in Haringey, London, London (N6 4JS). It has a recorded floor area of 815 m² (around 8773 sq ft), construction records dating it to 1930-1949 and council tax band H. The latest certificate (June 2019) returns a B (score 84), comfortably above the UK average. When first surveyed in November 2012 the rating was F, the property has climbed 4 bands since. Between certificates, wall efficiency went from Poor to Very Good, roof efficiency went from Very Poor to Good and window efficiency went from Poor to Very Good.
At 815 m² the property is well over the postcode median (580 m² across 10 EPCs), placing it in the larger end of the local stock. Its energy rating outperforms most of the postcode (better than 80% of similar EPCs). Today's modelled estimate of £7,763,000 sits 52.2% above the 2013 sale of £5,100,000. On a £-per-square-foot basis, the last sale (£581/sq ft) was about 40.7% below the postcode norm. 7 planning records sit against the property, 6 approved, 1 refused. Past consents include an extension, meaningful when judging how the property has evolved. 12 years since the last transfer (December 2013).
Energy performance
23a'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
Hot water efficiency improved
High performance glazing installed
Cavity wall insulation installed
Roof insulation improved
Floor insulation added or improved
More low energy lighting installed
Planning history
23a has been through 6 approved planning applications — a well-evolved property.
- Apr 2018ExtensionFullIn report
Variation of Condition 2 (plans and specifications) attached to planning application HGY/2016/2587, to include front entrance canopy; additional windows on south-west elevation; enlargement of front elevation window, amendment to roof form and internal alterations.
- Documents
- 14 docs on file
- Reference
- HGY/2018/0495
- Jul 2017ConditionsIn report
Removal of condition 3 (Level 4 of the Code for Sustainable Homes) attached to planning permission HGY/2016/2587
- Documents
- 7 docs on file
- Reference
- HGY/2017/1738
We flagged 1 thing worth checking at 23a
Independent checks surfaced things a buyer would want to understand before offering. The report explains each one in full, with the underlying data and what to ask.
- Larger development activity nearby
30-day money-back guarantee
Sales history & valuation
23a valuation sits well clear of the typical sold price in this postcode.
£7,763,000
Modelled from EPC, postcode comparables.
£5,100,000
Recorded with HM Land Registry.
Sales timeline
16 December 2013Most recent
£5,100,000
Median price across the last 5 sales in N6 4JS: £6,900,000 (2022–2018).
Nearby sales in N6 4JS
25 Sheldon Avenue, Haringey, London, N6 4JS
Sold Dec 2022
£6,950,0007 Sheldon Avenue, Haringey, London, N6 4JS
Sold Apr 2022
£8,500,00011 Sheldon Avenue, Haringey, London, N6 4JS
Sold Jul 2021
£6,900,00015 Sheldon Avenue, Haringey, London, N6 4JS
Sold May 2018
£5,250,00021 Sheldon Avenue, Haringey, London, N6 4JS
Sold Jul 2014
£5,000,000
Versus other Sheldon Avenue homes
Price per m² for 23a lags the street by a wide margin.
Price per m²
£6,258
Street avg £11,871
Floor Area
815 m²
Street avg 513 m²
CO₂ Emissions
10.0 t/year
Street avg 13.9 t/year
Years Held
12 years
Street avg 8 years
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The neighbourhood at a glance
Reported crime in the wider district is trending notably upward year-on-year.
Crime
7/mo
Rising year-on-year across the wider district.
Nearest stop
0.3 km
Stormont Road — bus stop.
Closest school
0.8 km
Highgate Primary School. 48 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
46.7dB

Night-time· 23:00 – 07:00
38.9dB







