21 St Michaels Mount, Northampton, NN1 4JG
About 21 St Michaels Mount
21 St Michaels Mount is an end-of-terrace house in Northampton (NN1 4JG). It has a recorded floor area of 178 m² (around 1916 sq ft), construction records dating it to before 1900 and council tax band B. The latest certificate (July 2016) shows an E (score 46), well below the UK norm with real room to improve. The rating has held steady at E across 2 certificates since June 2014. Between certificates, window efficiency went from Poor to Average, hot-water efficiency went from Good to Very Good and lighting went from Very Poor to Very Good; while roof efficiency dropped from Poor to Very Poor. The recommended improvements would lift it to C (score 75), a 2-band jump.
Held since February 1999 — that's 27 years off the open market, well above the local norm. At 178 m² the property is well over the postcode median (117 m² across 26 EPCs), placing it in the larger end of the local stock. Across 1998–1999, sale prices on this property compounded at 15.7% per year. Today's modelled estimate of £281,000 sits 349.6% above the 1999 sale of £62,500. On a £-per-square-foot basis, the last sale (£33/sq ft) was about 75.9% below the postcode norm. One planning record on file: an extension approved in 2014. Past consents include an extension, meaningful when judging how the property has evolved.
Everything you need to know about 21 St Michaels Mount
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

Energy performance
21 St Michaels Mount's carbon output runs well above what efficient homes in the postcode produce.
EPC Expired
This certificate is over 10 years old and is no longer valid.Expired 03 Jul 2026
EPC Rating
Property Improvements
Changes detected from historical EPC data
Hot water efficiency improved
Windows upgraded, improving insulation
More low energy lighting installed
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 £885 · Includes VAT
Planning history
21 St Michaels Mount has an approved single-storey rear extension on the planning record.
1 application on record at 21 St Michaels Mount, Northampton, NN1 4JG
- Jul 2014ExtensionFullOutcome in report
Extension: Single storey · Rear of property
Single-storey rear extension including wheelchair access (as amended by revised plan received on 25/06/2014).
- Documents
- 16 docs on file
- Reference
- N/2014/0581
Unlock 21 St Michaels Mount, Northampton, NN1 4JG's full planning history
You're seeing the shape of it. The report has the substance.
- Every decision — granted, refused or withdrawn (1 on record)
- All 1 application on this property in full, plus 65 notable nearby
- The 16 documents, officer reports & conditions
- What the pattern means for extending or converting here
One time fee only - money back guarantee
Sales history & valuation
21 St Michaels Mount's modelled value sits at over four times its earliest registered sale price (1998).
£281,000
Modelled from EPC, postcode comparables and a sale-price growth of 15.7% per year over 1 year.
£62,500
Growth on file: 15.7% per year over 1 year.
Sales timeline
26 February 1999Most recent
£62,500
+15.7%over 11 months30 March 1998
£54,000
Median price across the last 5 sales in NN1 4JG: £210,000 (2024–2021).
Nearby sales in NN1 4JG
20 St Michaels Mount, Northampton, NN1 4JG
Sold Jul 2024
£300,00045 St Michaels Mount, Northampton, NN1 4JG
Sold Sept 2022
£210,00036 St Michaels Mount, Northampton, NN1 4JG
Sold Apr 2022
£207,72525 St Michaels Mount, Northampton, NN1 4JG
Sold Apr 2022
£230,00047 St Michaels Mount, Northampton, NN1 4JG
Sold May 2021
£168,000
Versus other St Michaels Mount homes
21 St Michaels Mount is notably below the street on price per m².
Price per m²
£351
Street avg £1,520
Floor Area
178 m²
Street avg 125 m²
Habitable Rooms
8 rooms
Street avg 6 rooms
CO₂ Emissions
12.0 t/year
Street avg 6.6 t/year
Everything you need to know about 21 St Michaels Mount
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

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
0.2 km
Racecourse Pavillion — bus stop.
Closest school
0.3 km
Stimpson Avenue Academy. 30 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
52.0dB

Night-time· 23:00 – 07:00
42.2dB






