17 21, Flat 6 Charnwood Court, Charnwood Avenue, Northampton, NN3 3DX
About 17 21
17 21 is a mid-terrace house in Northampton (NN3 3DX). It has a recorded floor area of 80 m² (around 861 sq ft) and construction records dating it to 1950-1966. At 80 m² this is the 5th smallest of 6 units on EPC record in 17 21, where floor areas span 61–86 m². The building's EPC ratings span D to C, with this unit at the top. The latest certificate (July 2021) shows a C (score 76), near the top of the C band. Earlier certificates rated it B (October 2009); the latest reading is one band lower. Between certificates, window efficiency went from Average to Good; while wall efficiency dropped from Good to Very Poor.
At 80 m² it's 21.2% larger than the typical home in the postcode (66 m² median across 20 EPCs).
Everything you need to know about 17 21
The true value, the hidden risks and the full sale history, in one report.
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Energy performance
EPC Rating
Certificate validity
Valid until 8 July 2031
Property Improvements
Changes detected from historical EPC data
Window efficiency improved
Get a survey for this property
Level 3 Building Survey
Because the property has solid (non-cavity) walls, we believe a Level 3 building survey should be considered.
From £820 · Includes VAT
Planning history
17 21 has no planning applications on record.
But the area is active
7 notable applications nearby — larger schemes and conversions that could reshape the street. The report maps them all.
Sales history & valuation
17 21 has no Land Registry sales on file, suggesting it has stayed in the same hands since registration began.
£193,000
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.
Median price across the last 5 sales in NN3 3DX: £217,500 (2025–2014).
Nearby sales in NN3 3DX
45 Charnwood Avenue, Northampton, NN3 3DX
Sold Jun 2025
£218,00041 Charnwood Avenue, Northampton, NN3 3DX
Sold Dec 2020
£198,00039 Charnwood Avenue, Northampton, NN3 3DX
Sold Feb 2020
£217,50029 Charnwood Avenue, Northampton, NN3 3DX
Sold Dec 2017
£220,00047 Charnwood Avenue, Northampton, NN3 3DX
Sold May 2014
£152,000
Versus other Charnwood Avenue homes
On floor area, 17 21 stands well clear of the street.
EPC Rating
76 (C)
Street avg 70 (C)
Floor Area
80 m²
Street avg 70 m²
CO₂ Emissions
2.2 t/year
Street avg 2.6 t/year
Habitable Rooms
4 rooms
Street avg 4 rooms
Everything you need to know about 17 21
The true value, the hidden risks and the full sale history, in one report.
Pick your report · from £14.99
One time fee only - money back guarantee
The data behind every report
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The neighbourhood at a glance
Crime
461/mo
Falling year-on-year across the wider district.
Nearest stop
0.0 km
Charnwood Avenue — bus stop.
Closest school
0.4 km
Weston Favell Academy. 28 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
54.3dB
Night-time· 23:00 – 07:00
44.3dB