Model valuation£417,0008 Busby Close
Local market context
21 Claystones, Northampton, NN4 9UY
Estimated value
£439,000
- Since the 2000 sale (£58,000)+657%
- Against NN4 9UY's recent median (£345,000)+27%
Newest record on this page: August 2025. Land Registry and EPC registers update monthly, so this page can trail them by 2–3 months.
Property type
Detached
Habitable rooms
6
From EPC
Floor area
161 m²
1733 sq ft
Energy rating
C
Score 73
Council tax
Band E
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
£439,000
- Against its 2000 sale (£58,000)+657%
- Against NN4 9UY's recent median (£345,000)+27%
Your note and figure are shown publicly on this page.
How the estimate is made
The estimate for 21 Claystones is modelled from its 161 m² EPC floor area, its 2 recorded sales and recent sales of comparable homes in NN4 9UY. 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
161 m² from the EPC lodged in October 2015
Sales of this home
2 sales recorded, the latest in 2000
Recent sales in NN4 9UY
5 sales, median £345,000 (2025–2022)
This page or the full report?
| Data | This page | Full report |
|---|---|---|
| Sales | Latest sale shown: August 2025 | 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 Claystones's modelled value sits at over four times its earliest registered sale price (1996).
Sales timeline
5 April 2000Most recent
£58,000
-29.3%over 4 years21 March 1996
£82,000
Median price across the last 5 sales in NN4 9UY: £345,000 (2025–2022).
Nearby sales in NN4 9UY
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 Claystones
A plain-English summary derived from public records, EPC certificates, sold prices and local data.
21 Claystones is a detached house in Northampton (NN4 9UY). It has a recorded floor area of 161 m² (around 1733 sq ft), construction records dating it to 1983-1990 and council tax band E. The latest certificate (October 2015) shows a C (score 73). The recommended improvements would push it to B (score 82). The latest certificate is from October 2015, so improvements made since then won't be reflected.
Held since April 2000 — that's 26 years off the open market, well above the local norm. At 161 m² the property is well over the postcode median (105 m² across 17 EPCs), placing it in the larger end of the local stock. Across 1996–2000, sale prices on this property compounded at -8.2% per year. Today's modelled estimate of £439,000 sits 656.9% above the 2000 sale of £58,000. On a £-per-square-foot basis, the last sale (£33/sq ft) was about 81.6% below the postcode norm.
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Everything you need to know about 21 Claystones
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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.
EPC Expired
This certificate is over 10 years old and is no longer valid.Expired 12 Oct 2025
Current Certificate
Oct 2015EPC Rating
A
B
C
C73
D
E
F
G
Main Heating
Gas
Main Fuel
Gas
Hot Water
Good
Windows
Good
CO2 Emissions
4.8 t/year
Occupancy
Owner Occupied
Certificate validity
Expired on 12 October 2025
Planning history
Applications and permits filed against 21 Claystones, Northampton, NN4 9UY, sourced from the PlanIt planning register.
21 Claystones 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 Claystones homes
Four headline reads against 17 similar houses on this street, drawn from the latest EPC and Land Registry data.
On price per m², 21 Claystones runs well behind the street norm.
Price per m²
£360
Street avg £2,962
Floor Area
161 m²
Street avg 113 m²
Habitable Rooms
6 rooms
Street avg 5 rooms
CO₂ Emissions
4.8 t/year
Street avg 4.7 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
0.3 km
Ladymead Close — bus stop.
Closest school
0.9 km
Hunsbury Park Primary School. 18 schools nearby.
Nearest schools
- Hunsbury Park Primary SchoolPrimary910m
- Pineham Barns Primary SchoolPrimary1.1km
- Briar Hill Primary School & NurseryPrimary1.1km
- Upton Meadows Primary SchoolPrimary1.5km
Nearest stops
- Ladymead CloseBus stop261m
- Whaddon CloseBus stop293m
- Ashpole SpinneyBus stop396m
- Hunsbury Hill RoadBus stop460m
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 9UY from Defra's strategic mapping. The pin marks this postcode's centroid.
Daytime· 07:00 – 23:00
56.1dB
Night-time· 23:00 – 07:00
46.8dB
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 C
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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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Start your researchHow to read this page
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 Claystones is modelled from its 161 m² EPC floor area, its 2 recorded sales and recent sales of comparable homes in NN4 9UY. 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. 2 sales are recorded for 21 Claystones. 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 Claystones was lodged in October 2015 at band C and expired in October 2025, 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 Claystones. 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 18 schools and 30 stops listed are measured in a straight line from NN4 9UY, not by walking route. Road noise is Defra's strategic noise modelling, averaged across the postcode.
- Council tax band
- 21 Claystones is in council tax band E. 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 Claystones, Northampton, NN4 9UY. Each answer is also embedded as structured data for search engines.
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- Every home in NN4 9UYSold prices, values and energy ratings for the postcode
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