Model valuation£417,0008 Busby Close
Local market context
23 Blackwell Hill, Northampton, NN4 9YB
5 sales on record1 planning record
Estimated value
£307,000
- Since the 2017 sale (£227,000)+35%
- Against NN4 9YB's recent median (£295,000)+4%
Newest record on this page: February 2026. Land Registry and EPC registers update monthly, so this page can trail them by 2–3 months.
Property type
Detached
Bedrooms
3
Floor area
76 m²
818 sq ft
Energy rating
D
Score 68
Council tax
Band C
Tenure
Owner Occupied
About this valuation
How the figure is worked out and what it's based on. If you know this home, you can tell other visitors what you think it's worth.
Our estimate
£307,000
- Against its 2017 sale (£227,000)+35%
- Against NN4 9YB's recent median (£295,000)+4%
Your note and figure are shown publicly on this page.
How the estimate is made
The estimate for 23 Blackwell Hill is modelled from its 76 m² EPC floor area, its 5 recorded sales and recent sales of comparable homes in NN4 9YB. It is an automated estimate, not a survey or mortgage valuation: condition, layout and improvements that aren't on record can move the real figure either way.
What it's based on
Floor area
76 m² from the EPC lodged in May 2016
Sales of this home
5 sales recorded, the latest in 2017
Recent sales in NN4 9YB
5 sales, median £295,000 (2026–2024)
This page or the full report?
| Data | This page | Full report |
|---|---|---|
| Sales | Latest sale shown: February 2026 | Latest available records, read when you order |
| Valuation | Estimate from the last refresh | Analysed against comparable sales |
| Planning | 1 application | Full history, plus nearby schemes |
| Flood risk | Not shown | Included |
Sales history & valuation
Every recorded sale of this home, how its price has moved, and what neighbouring properties have sold for.
23 Blackwell Hill has more than tripled in price since its earliest registered sale in 1997.
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: £295,000 (2026–2024).
Nearby sales in NN4 9YB
What this page doesn't show
Nothing is flagged from the data on this page, but these checks are only run in the report. The detail, evidence and what to ask about it are in the Risks Report.
- Flood risk from rivers, sea and surface waterIn report
- Subsidence and ground-stability signalsIn report
- Refusals, enforcement and big schemes nearbyIn report
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About 23 Blackwell Hill
A plain-English summary derived from public records, EPC certificates, sold prices and local data.
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 £307,000 is 35.2% above the 2017 sale price. On a £-per-square-foot basis, the last sale (£277/sq ft) was about 66% 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 25 EPCs). One planning record on file: an extension refused in 2017.
What this property has
Pulled from EPC certificates, claim submissions and our property model. Empty categories are hidden — we only show what's known.
Inside
- Bedrooms3
- Dining roomYes
Outside
- Private gardenYes
- GarageYes
Building
- RefurbishedYes
Before you decide
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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The data behind every report
Energy performance
Every EPC certificate filed against this property — current rating, recorded improvements, and where there's headroom to reach a higher band.
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
Current Certificate
May 2016EPC Rating
A
B
C
D
D68
E
F
G
Main Heating
Gas
Main Fuel
Gas
Hot Water
Good
Windows
Average
CO2 Emissions
3.1 t/year
Occupancy
Owner Occupied
Certificate validity
Expired on 2 May 2026
Planning history
Applications and permits filed against 23 Blackwell Hill, Northampton, NN4 9YB, sourced from the PlanIt planning register.
1 application on record at 23 Blackwell Hill, Northampton, NN4 9YB
1decisions1extensions9documents
- 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
You're seeing the shape of it. The report has the substance.
- 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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Versus other Blackwell Hill homes
Four headline reads against 25 similar houses on this street, drawn from the latest EPC and Land Registry data.
23 Blackwell Hill outperforms the street on co₂ emissions by a wide margin.
Price per m²
£2,987
Street avg £2,606
Floor Area
76 m²
Street avg 98 m²
Habitable Rooms
4 rooms
Street avg 5 rooms
CO₂ Emissions
3.1 t/year
Street avg 4.2 t/year
The neighbourhood at a glance
A condensed read of the local area. Each tile links through to the full breakdown on the Northampton district page.
Crime
339/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.
Nearest schools
- Simon de Senlis Primary SchoolPrimary897m
- Hunsbury Park Primary SchoolPrimary1.1km
- Abbeyfield SchoolSecondary1.4km
- East Hunsbury Primary SchoolPrimary1.4km
Nearest stops
- Tideswell CloseBus stop102m
- Ladybridge DriveBus stop186m
- Bitterns StreetBus stop387m
- Kites CloseBus stop400m
Most reported crime locally
- Violence & Sexual Offences1,851 reports36%
- Anti-social Behaviour1,154 reports23%
- Other Theft390 reports8%
- Criminal Damage & Arson325 reports6%
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
Modelled day and night-time noise levels around NN4 9YB from Defra's strategic mapping. The pin marks this postcode's centroid.
Daytime· 07:00 – 23:00
54.4dB
Night-time· 23:00 – 07:00
46.3dB
55 dB
60 dB
65 dB
70 dB
75 dB
80 dB
Defra Road Noise Strategic Mapping, Round 4
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Late 20th centuryDetached HouseEPC D
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Similar properties nearby
A handful of close matches in the same postcode area, ranked by likeness on bedrooms, type and floor area.
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Where every figure above comes from, how current it is and what it can't tell you.
- How the estimate is made
- The estimate for 23 Blackwell Hill is modelled from its 76 m² EPC floor area, its 5 recorded sales and recent sales of comparable homes in NN4 9YB. It is an automated estimate, not a survey or mortgage valuation: condition, layout and improvements that aren't on record can move the real figure either way.
- Where sold prices come from
- Sold prices are HM Land Registry Price Paid Data, which covers residential sales in England and Wales since 1995. 5 sales are recorded for 23 Blackwell Hill. Sales normally appear two to three months after completion, so the most recent ones take time to show up anywhere.
- Reading the EPC
- Energy Performance Certificates rate homes from A (most efficient) to G and last 10 years. The latest one for 23 Blackwell Hill was lodged in May 2016 at band D and expired in May 2026, so a new one is needed to sell or let. Floor area, heating and insulation details on this page come from it.
- Planning records
- Planning applications are collected from local authority registers through PlanIt. 1 application is matched to 23 Blackwell Hill. Councils sometimes file applications under a different address format, and applications on neighbouring land aren't listed here; the report covers both.
- Area figures
- Crime is police-recorded street-level data over the last 15 months, which places each incident at an approximate point. The 17 schools and 30 stops listed are measured in a straight line from NN4 9YB, not by walking route. Road noise is Defra's strategic noise modelling, averaged across the postcode.
- Council tax band
- 23 Blackwell Hill is in council tax band C. Bands are set by the Valuation Office Agency from historic values (1 April 1991 in England, 1 April 2003 in Wales), not today's price; the amount you pay depends on the council's rate for the band.
Common questions
The questions buyers, sellers and homeowners most often ask about 23 Blackwell Hill, Northampton, NN4 9YB. Each answer is also embedded as structured data for search engines.
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