Model valuation£417,0008 Busby Close
Local market context
21 Blackwell Hill, Northampton, NN4 9YB
3 sales on record
Estimated value
£271,000
- Since the 2012 sale (£150,000)+81%
- Against NN4 9YB's recent median (£295,000)-8%
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
Habitable rooms
5
From EPC
Floor area
76 m²
818 sq ft
Energy rating
E
Score 50
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
£271,000
- Against its 2012 sale (£150,000)+81%
- Against NN4 9YB's recent median (£295,000)-8%
Your note and figure are shown publicly on this page.
How the estimate is made
The estimate for 21 Blackwell Hill is modelled from its 76 m² EPC floor area, its 3 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 April 2012
Sales of this home
3 sales recorded, the latest in 2012
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 | None on this home | 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.
21 Blackwell Hill valuation sits well clear of the typical sold price in this postcode.
Sales timeline
28 June 2012Most recent
£150,000
+4.9%over 8 years3 March 2004
£143,000
+36.2%over 1 year15 March 2002
£105,000
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 21 Blackwell Hill
A plain-English summary derived from public records, EPC certificates, sold prices and local data.
21 Blackwell Hill is a detached house in Northampton (NN4 9YB). It has a recorded floor area of 76 m² (around 818 sq ft), construction records dating it to 1983-1990 and council tax band C. The latest certificate (April 2012) shows an E (score 50), well below the UK norm with real room to improve. The recommended improvements would lift it to C (score 78), a 2-band jump. The latest certificate is from April 2012, so improvements made since then won't be reflected.
Across 2002–2012, sale prices on this property compounded at 3.5% per year. Today's modelled estimate of £271,000 sits 80.7% above the 2012 sale of £150,000. At 76 m² it's 17.3% smaller than the typical home in the postcode (92 m² median across 25 EPCs). It lags the bulk of the postcode on energy efficiency (less efficient than 88% of similar EPCs). Last sold in June 2012, so it's been off the market for around 14 years.
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Everything you need to know about 21 Blackwell Hill
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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 09 Apr 2022
Current Certificate
Apr 2012EPC Rating
A
B
C
D
E
E50
F
G
Main Heating
Gas
Main Fuel
Gas
Hot Water
Average
Windows
Very Poor
CO2 Emissions
4.9 t/year
Occupancy
Owner Occupied
Certificate validity
Expired on 9 April 2022
Planning history
Applications and permits filed against 21 Blackwell Hill, Northampton, NN4 9YB, sourced from the PlanIt planning register.
21 Blackwell Hill has no planning applications on record.
A planning report still maps activity across the surrounding area and reads this property's extension & conversion potential.
Versus other Blackwell Hill homes
Four headline reads against 25 similar houses on this street, drawn from the latest EPC and Land Registry data.
On epc rating, 21 Blackwell Hill runs well behind the street norm.
Price per m²
£1,974
Street avg £2,652
Floor Area
76 m²
Street avg 98 m²
Habitable Rooms
5 rooms
Street avg 5 rooms
CO₂ Emissions
4.9 t/year
Street avg 4.1 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 E
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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 21 Blackwell Hill is modelled from its 76 m² EPC floor area, its 3 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. 3 sales are recorded for 21 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 21 Blackwell Hill was lodged in April 2012 at band E and expired in April 2022, 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. None is matched to 21 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
- 21 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 21 Blackwell Hill, Northampton, NN4 9YB. Each answer is also embedded as structured data for search engines.
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- Every home in NN4 9YBSold prices, values and energy ratings for the postcode
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