23 Blackwell Hill, Northampton, NN4 9YB
About 23 Blackwell Hill
23 Blackwell Hill is a three-bedroom detached house in Northampton (NN4 9YB). It has a recorded floor area of 76 m² (around 818 sq ft), construction records dating it to 1991-1995 and council tax band C. The latest certificate (May 2016) shows a D (score 68), on the cusp of jumping into the C band. The recommended improvements would lift it to B (score 83), a 2-band jump. The latest certificate is from May 2016, so improvements made since then won't be reflected.
On the market in March 2017 and unlisted since — roughly 9 years. Across the public record there are 5 sales, relatively high churn for a single property. Across 1997–2017, sale prices on this property compounded at 7.4% per year. Today's modelled estimate of £297,000 is 30.8% above the 2017 sale price. On a £-per-square-foot basis, the last sale (£277/sq ft) was about 67.6% above the typical sold price in the postcode. At 76 m² it's 17.3% smaller than the typical home in the postcode (92 m² median across 24 EPCs). One planning record on file: an extension refused in 2017.
What this property has
Inside
- Bedrooms3
- Dining roomYes
Outside
- Private gardenYes
- GarageYes
Building
- RefurbishedYes
Everything you need to know about 23 Blackwell Hill
The true value, the hidden risks and the full sale history, in one report.
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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This certificate is over 10 years old and is no longer valid.Expired 02 May 2026
EPC Rating
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Planning history
1 application on record at 23 Blackwell Hill, Northampton, NN4 9YB
- Mar 2017ExtensionFullOutcome in report
Extension: Single storey · Rear of property
Single storey rear flat roof extension.
- Documents
- 9 docs on file
- Reference
- N/2017/0104
Unlock 23 Blackwell Hill, Northampton, NN4 9YB's full planning history
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- Every decision — granted, refused or withdrawn (1 on record)
- All 1 application on this property in full
- The 9 documents, officer reports & conditions
- What the pattern means for extending or converting here
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Sales history & valuation
23 Blackwell Hill has more than tripled in price since its earliest registered sale in 1997.
£297,000
Modelled from EPC, postcode comparables and a sale-price growth of 7.4% per year over 19 years.
£227,000
Growth on file: 7.4% per year over 19 years.
Sales timeline
3 March 2017Most recent
£227,000
+39.3%over 11 years13 July 2005
£163,000
+64.7%over 3 years9 August 2001
£98,995
+37.5%over 2 years26 February 1999
£72,000
+26.3%over 1 year9 October 1997
£57,000
Median price across the last 5 sales in NN4 9YB: £299,995 (2025–2023).
Nearby sales in NN4 9YB
Versus other Blackwell Hill homes
23 Blackwell Hill outperforms the street on co₂ emissions by a wide margin.
Price per m²
£2,987
Street avg £2,612
Floor Area
76 m²
Street avg 99 m²
Habitable Rooms
4 rooms
Street avg 5 rooms
CO₂ Emissions
3.1 t/year
Street avg 4.3 t/year
Everything you need to know about 23 Blackwell Hill
The true value, the hidden risks and the full sale history, in one report.
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Similar properties nearby
The neighbourhood at a glance
Crime
9/mo
Steady year-on-year across the wider district.
Nearest stop
0.1 km
Tideswell Close — bus stop.
Closest school
0.9 km
Simon de Senlis Primary School. 17 schools nearby.
Go deeper on the local area
A Local Area report breaks down crime, transport links, schools and air quality in depth.
Road noise across the postcode
Daytime· 07:00 – 23:00
54.4dB
Night-time· 23:00 – 07:00
46.3dB