4d, Castilian Street, Northampton, NN1 1JX
About 4d
4d is a mid-terrace house in Northampton (NN1 1JX). It has a recorded floor area of 53 m² (around 570 sq ft), construction records dating it to 1900-1929 and council tax band A. The latest certificate (January 2024) shows a C (score 76), near the top of the C band. The rating has held steady at C across 2 certificates since January 2014. Between certificates, window efficiency went from Poor to Average; while hot-water efficiency dropped from Very Good to Good. At 53 m² this is the 12th smallest of 17 units on EPC record in the building, where floor areas span 38–66 m².
Everything you need to know about 4d
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
EPC Rating
Property Improvements
Changes detected from historical EPC data
Hot water efficiency decreased
Window efficiency improved
Get a survey for this property
Level 3 Building Survey
Because the property was built before 1919 and has solid (non-cavity) walls, we believe a Level 3 building survey should be considered.
From £820 · Includes VAT
Planning history
4d has no planning applications on record.
But the area is active
45 notable applications nearby — larger schemes and conversions that could reshape the street. The report maps them all.
Sales history & valuation
4d has no Land Registry sales on file, suggesting it has stayed in the same hands since registration began.
£140,000
Modelled from EPC, postcode comparables.
No sales recorded with HM Land Registry
That can mean the property has never traded since the registry began publishing in 1995, was a new build that hasn't been registered yet, or is held in the same hands long-term.
Versus other Castilian Street homes
EPC Rating
76 (C)
Street avg 73 (C)
Floor Area
53 m²
Street avg 49 m²
CO₂ Emissions
1.6 t/year
Street avg 1.7 t/year
Habitable Rooms
2 rooms
Street avg 2 rooms
Everything you need to know about 4d
The true value, the hidden risks and the full sale history, in one report.
Pick your report · every report is £14.99
One time fee only - money back guarantee
The data behind every report
Similar properties nearby
The neighbourhood at a glance
Reported crime in the wider district is trending notably upward year-on-year.
Crime
11/mo
Rising 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. 31 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
56.6dB
Night-time· 23:00 – 07:00
47.3dB