21 Robert Street, Northampton, NN1 3BL
About 21 Robert Street
21 Robert Street is a mid-terrace house in Northampton (NN1 3BL). It has a recorded floor area of 112 m² (around 1206 sq ft), construction records dating it to before 1900 and council tax band A. The latest certificate (February 2020) shows a D (score 62), on the cusp of jumping into the C band. The recommended improvements would lift it to B (score 85), a 2-band jump.
Held since December 2004 — that's 21 years off the open market, well above the local norm. At 112 m² the property is well over the postcode median (77 m² across 11 EPCs), placing it in the larger end of the local stock. Across 1996–2004, sale prices on this property compounded at 24.4% per year. Today's modelled estimate of £227,000 sits 70% above the 2004 sale of £133,500. One planning record on file: HMO conversion approved in 2021. Past consents include HMO conversion, meaningful when judging how the property has evolved.
Everything you need to know about 21 Robert Street
The true value, the hidden risks and the full sale history, in one report.
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Energy performance
Recommended upgrades on file would lift this property by multiple EPC bands.
EPC Rating
Get a survey for this property
Level 3 Building Survey
Because the property was built before 1919, has been extended more than once, and has solid (non-cavity) walls, we believe a Level 3 building survey should be considered.
From £885 · Includes VAT
Planning history
1 application on record at 21 Robert Street, Northampton, NN1 3BL
- Aug 2021HMOFullOutcome in report
Change of Use from Dwellinghouse (Use Class C3) to House in Multiple Occupation (Use Class C4) for 4 occupants (Retrospective)
Retrospective- Documents
- 19 docs on file
- Reference
- WNN/2021/0187
Unlock 21 Robert Street, Northampton, NN1 3BL'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- Every decision — granted, refused or withdrawn (1 on record)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 42 notable nearby
- The 19 documents, officer reports & conditions
- What the pattern means for extending or converting here
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Sales history & valuation
Price for 21 Robert Street has grown more than fourfold since the 1996 starting point.
£227,000
Modelled from EPC, postcode comparables and a sale-price growth of 24.4% per year over 9 years.
£133,500
Growth on file: 24.4% per year over 9 years.
Sales timeline
23 December 2004Most recent
£133,500
+196.7%over 7 years25 February 1997
£45,000
+125.0%over 11 months11 April 1996
£20,000
Median price across the last 5 sales in NN1 3BL: £225,000 (2024–2021).
Nearby sales in NN1 3BL
Versus other Robert Street homes
21 Robert Street outperforms the street on habitable rooms by a wide margin.
Price per m²
£1,192
Street avg £1,736
Floor Area
112 m²
Street avg 99 m²
Habitable Rooms
7 rooms
Street avg 4 rooms
CO₂ Emissions
5.3 t/year
Street avg 4.6 t/year
Everything you need to know about 21 Robert Street
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
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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
Police Station — bus stop.
Closest school
0.4 km
Castle Academy. 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
53.9dB
Night-time· 23:00 – 07:00
43.9dB