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Get started23 Sywell Road is a detached house in Overstone, Northampton, Northampton (NN6 0AQ). It has a recorded floor area of 686 m² (around 7384 sq ft), construction records dating it to 1950-1966 and council tax band G. The latest certificate (August 2019) returns a high B (score 88), putting the home a stone's throw from an A rating. When first surveyed in November 2018 the rating was D, the property has climbed 2 bands since. Between certificates, wall efficiency went from Poor to Very Good, roof efficiency went from Average to Very Good and window efficiency went from Very Poor to Very Good.
At 686 m² the property is well over the postcode median (144 m² across 27 EPCs), placing it in the larger end of the local stock. On energy efficiency it sits in the top 10% of properties in this postcode. Today's modelled estimate of £854,000 sits 184.7% above the 2018 sale of £300,000. On a £-per-square-foot basis, the last sale (£41/sq ft) was about 80.5% below the postcode norm. Most recent transfer: October 2018 at £300,000. One historical planning record sits against the property in 2019.
23 Sywell Road ranks among the most efficient homes in the postcode for energy use.
Construction of detached triple garage
23 Sywell Road valuation sits well clear of the typical sold price in this postcode.
£854,000
Modelled from EPC, postcode comparables.
£300,000
Recorded with HM Land Registry.
On price per m², 23 Sywell Road runs well behind the street norm.
Price per m²
£437
Street avg £2,832
Floor Area
686 m²
Street avg 161 m²
CO₂ Emissions
7.9 t/year
Daytime road noise here sits well below conversation level — a quiet pocket of the postcode.
Crime
4/mo
Steady year-on-year across the wider district.
Nearest stop
0.2 km

Daytime· 07:00 – 23:00
42.8dB

Changes detected from historical EPC data
Heating controls upgraded for better temperature management
High performance glazing installed
Cavity wall insulation installed
Loft insulation upgraded to recommended levels
Floor insulation added or improved
More low energy lighting installed
Are we missing something? Tell us about home improvements to help adjust your valuation.
24 October 2018Most recent
£300,000
Median price across the last 5 sales in NN6 0AQ: £468,500 (2025–2024).
Street avg 5.9 t/year
Years Held
8 years
Street avg 8 years
Post Office — bus stop.
Closest school
0.4 km
Overstone Primary School. 12 schools nearby.
Night-time· 23:00 – 07:00
36.8dB
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