17 Cornwall Avenue, Haringey, London, N22 7DA
About 17 Cornwall Avenue
17 Cornwall Avenue is a mid-terrace house in Haringey, London, London (N22 7DA). It has a recorded floor area of 133 m² (around 1432 sq ft), construction records dating it to 1900-1929 and council tax band D. The latest certificate (June 2016) shows a D (score 68), on the cusp of jumping into the C band. The recommended improvements would lift it to B (score 81), a 2-band jump. The latest certificate is from June 2016, so improvements made since then won't be reflected.
At 133 m² the property is well over the postcode median (99 m² across 34 EPCs), placing it in the larger end of the local stock. 3 planning records sit against the property, 1 approved, 1 refused. Past consents include an extension, meaningful when judging how the property has evolved. Across 2008–2021, sale prices on this property compounded at 5.8% per year. Today's modelled estimate of £1,103,000 is 28.7% above the 2021 sale price. On a £-per-square-foot basis, the last sale (£599/sq ft) was about 55.2% above the typical sold price in the postcode. Last sale on file: £857,000 in May 2021. That sale was during the post-pandemic price surge, when transactions cleared materially above pre-2020 trend.
Know exactly what you're buying at 17 Cornwall Avenue
Before you offer, see what the listing won't tell you, the true value, the red flags and the full history.
Already flagged here
Valuation
against the asking price
Risks
planning & flood
Sold prices
similar homes nearby
Trends
the local market
Energy performance
Recommended upgrades on file would lift this property by multiple EPC bands.
EPC Expired
This certificate is over 10 years old and is no longer valid.Expired 06 Jun 2026
EPC Rating
Planning history
A a single-storey rear extension application was refused at 17 Cornwall Avenue in 2022.
- Mar 2023ExtensionOutlineIn report
Extension: Single storey · Rear of property
Erection of single storey extension which extends beyond the rear wall of the original house by 3.66m, for which the maximum height would be 3.2m and for which the height of the eaves would be 2.99m
- Documents
- 8 docs on file
- Reference
- HGY/2023/0567
- Feb 2023ExtensionOutlineIn report
Extension: Single storey · Rear of property
Certificate of Lawfulness for proposed single storey rear extension
- Documents
- 8 docs on file
- Reference
- HGY/2023/0415
We flagged 1 thing worth checking at 17 Cornwall Avenue
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
Sale price has at least doubled since 2008.
£1,103,000
Modelled from EPC, postcode comparables and a sale-price growth of 5.8% per year over 13 years.
£857,000
Growth on file: 5.8% per year over 13 years.
Sales timeline
26 May 2021Most recent
£857,000
+109.0%over 13 years20 March 2008
£410,000
Median price across the last 5 sales in N22 7DA: £1,050,000 (2025–2024).
Nearby sales in N22 7DA
27 Cornwall Avenue, Haringey, London, N22 7DA
Sold Apr 2025
£845,00023 Cornwall Avenue, Haringey, London, N22 7DA
Sold Mar 2025
£1,050,00030 Cornwall Avenue, Haringey, London, N22 7DA
Sold Dec 2024
£1,051,00025 Cornwall Avenue, Haringey, London, N22 7DA
Sold Nov 2024
£1,062,5003 Cornwall Avenue, Haringey, London, N22 7DA
Sold Sept 2024
£980,000
Everything we know about 17 Cornwall Avenue, in one report
What it's really worth, what could be wrong, and the planning, sales and area data in full.
What we flagged
- Larger development activity nearby

Versus other Cornwall Avenue homes
On habitable rooms, 17 Cornwall Avenue stands well clear of the street.
Price per m²
£6,444
Street avg £6,085
Floor Area
133 m²
Street avg 112 m²
Habitable Rooms
7 rooms
Street avg 6 rooms
CO₂ Emissions
4.4 t/year
Street avg 4.8 t/year
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The neighbourhood at a glance
Rail-style transport is unusually close for this postcode.
Crime
10/mo
Rising year-on-year across the wider district.
Nearest stop
0.2 km
Park Avenue Wood Green — bus stop.
Closest school
0.3 km
Heartlands High School. 63 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
55.0dB

Night-time· 23:00 – 07:00
44.6dB