Model valuation£417,0008 Busby Close
Local market context
Flat 1, 9 Castilian Street, Northampton, NN1 1JS
Estimated value
£173,000
- Since the 2025 sale (£225,000)-23%
- Against NN1 1JS's recent median (£249,995)-31%
Newest record on this page: April 2026. Land Registry and EPC registers update monthly, so this page can trail them by 2–3 months.
Property type
Mid terrace
Floor 0
Floor area
62 m²
667 sq ft
Energy rating
C
Score 74
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
£173,000
- Against its 2025 sale (£225,000)-23%
- Against NN1 1JS's recent median (£249,995)-31%
Your note and figure are shown publicly on this page.
How the estimate is made
The estimate for Flat 1 is modelled from its 62 m² EPC floor area, its 1 recorded sale and recent sales of comparable homes in NN1 1JS. 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
62 m² from the EPC lodged in January 2021
Sales of this home
1 sale recorded, the latest in 2025
Recent sales in NN1 1JS
5 sales, median £249,995 (2026–2016)
This page or the full report?
| Data | This page | Full report |
|---|---|---|
| Sales | Latest sale shown: April 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.
Sales timeline
14 March 2025Most recent
£225,000
Median price across the last 5 sales in NN1 1JS: £249,995 (2026–2016).
Nearby sales in NN1 1JS
Flat, 21 Castilian Street, Northampton, NN1 1JS
Sold Apr 2026
£330,0005 Castilian Street, Northampton, NN1 1JS
Sold Dec 2017
£285,000Flat 2, 7 Castilian Street, Northampton, NN1 1JS
Sold Jun 2017
£99,450Flat 3, 7 Castilian Street, Northampton, NN1 1JS
Sold Mar 2016
£113,500Flat 1, 7 Castilian Street, Northampton, NN1 1JS
Sold May 2015
£120,000
What this page doesn't show
2 potential issues have already been flagged for Flat 1, 9 Castilian Street, Northampton, NN1 1JS. The detail, evidence and what to ask about it are in the Risks Report.
- Signs of HMO activity in the areaIn report
- Larger development activity nearbyIn 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 Flat 1
A plain-English summary derived from public records, EPC certificates, sold prices and local data.
Flat 1 is a mid-terrace house in Northampton (NN1 1JS). It has a recorded floor area of 62 m² (around 667 sq ft). At 62 m² this is the largest unit on EPC record across the building (29–62 m²). The latest certificate (January 2021) shows a C (score 74).
Today's modelled estimate of £173,000 is 23.1% below the 2025 sale of £225,000, a rare downward gap that often correlates with deferred maintenance or unfinished works. On a £-per-square-foot basis, the last sale (£337/sq ft) was about 145.6% above the typical sold price in the postcode. It changed hands recently, sold March 2025 for £225,000.
Before you decide
Everything you need to know about Flat 1
The true value, the hidden risks and the full sale history, in one report.
Signs of HMO activity in the areaLarger development activity nearby
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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.
Current Certificate
Jan 2021EPC Rating
A
B
C
C74
D
E
F
G
Main Heating
Gas
Main Fuel
Gas
Hot Water
Very Poor
Windows
Very Good
CO2 Emissions
1.7 t/year
Occupancy
—
Certificate validity
Valid until 8 January 2031
Planning history
Applications and permits filed against Flat 1, 9 Castilian Street, Northampton, NN1 1JS, sourced from the PlanIt planning register.
Flat 1 has no planning applications on record.
43
But the area is active
43 notable applications nearby — larger schemes and conversions that could reshape the street. The report maps them all.
Versus other Castilian Street homes
Four headline reads against 13 similar flats on this street, drawn from the latest EPC and Land Registry data.
On price per m², Flat 1 stands well clear of the street.
Price per m²
£3,629
Street avg £2,374
Floor Area
62 m²
Street avg 53 m²
CO₂ Emissions
1.7 t/year
Street avg 2.3 t/year
Years Held
1 years
Street avg 10 years
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
571/mo
Steady year-on-year across the wider district.
Nearest stop
0.1 km
Post Office — bus stop.
Closest school
0.8 km
Spring Lane Primary School. 32 schools nearby.
Nearest schools
- Spring Lane Primary SchoolPrimary806m
- Castle AcademyPrimary821m
- Vernon Terrace Primary SchoolPrimary902m
- Northampton International AcademyAll-through985m
Nearest stops
- Post OfficeBus stop55m
- Derngate CentreBus stop72m
- Mercers RowBus stop239m
- Northampton Bus InterchangeBus stop324m
Most reported crime locally
- Violence & Sexual Offences2,940 reports32%
- Anti-social Behaviour1,893 reports21%
- Shoplifting785 reports9%
- Public Order622 reports7%
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 NN1 1JS from Defra's strategic mapping. The pin marks this postcode's centroid.
Daytime· 07:00 – 23:00
57.0dB
Night-time· 23:00 – 07:00
47.6dB
55 dB
60 dB
65 dB
70 dB
75 dB
80 dB
Defra Road Noise Strategic Mapping, Round 4
Get a survey for this property
Level 2 HomeBuyer Report
Ground Floor FlatEPC 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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16 Saxon Court, Flat 3, St Peters Street
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£159k
16 Saxon Court, Flat 2, St Peters Street
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£158k
16 20, Flat 3, Gold Street
NN1 1RT
Flat
£158k
16 20, Flat 6, Gold Street
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Flat
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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 Flat 1 is modelled from its 62 m² EPC floor area, its 1 recorded sale and recent sales of comparable homes in NN1 1JS. 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. 1 sale is recorded for Flat 1. 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 Flat 1 was lodged in January 2021 at band C and is valid until January 2031. 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 Flat 1. 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 16 months, which places each incident at an approximate point. The 32 schools and 30 stops listed are measured in a straight line from NN1 1JS, not by walking route. Road noise is Defra's strategic noise modelling, averaged across the postcode.
Common questions
The questions buyers, sellers and homeowners most often ask about Flat 1, 9 Castilian Street, Northampton, NN1 1JS. Each answer is also embedded as structured data for search engines.
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Keep exploring
- Every home in NN1 1JSSold prices, values and energy ratings for the postcode
- NN 1 property marketPrices, postcodes, schools and transport across the district
- Flat 1, 9 Castilian Street, Northampton valuationHow the estimate is built and what moves it
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