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Get started14 Grass Slade is a four-bedroom detached house in Brixworth, Northampton, Northampton (NN6 9HZ). It has a recorded floor area of 134 m² (around 1442 sq ft), construction records dating it to 1976-1982 and council tax band D. The latest certificate (July 2025) shows a C (score 69), just inside the C band. When first surveyed in January 2013 the rating was D, the property has climbed 1 band since. Between certificates, hot-water efficiency went from Poor to Good and lighting went from Average to Very Good; while roof efficiency dropped from Very Good to Good. Records show the property has been extended at some point in its history.
At 134 m² the property is well over the postcode median (86 m² across 19 EPCs), placing it in the larger end of the local stock. Its energy rating outperforms most of the postcode (better than 74% of similar EPCs). Today's modelled estimate of £444,000 sits 90.6% above the 2013 sale of £233,000. On a £-per-square-foot basis, the last sale (£162/sq ft) was about 17.5% below the postcode norm. One planning record on file: an extension approved in 2020. Past consents include an extension, meaningful when judging how the property has evolved. On the market in November 2013 and unlisted since — roughly 13 years.
14 Grass Slade has an approved single-storey rear extension on the planning record.
Extension: Single storey · Rear of property
First floor rear extension.
14 Grass Slade valuation sits well clear of the typical sold price in this postcode.
£444,000
Modelled from EPC, postcode comparables.
£233,000
Recorded with HM Land Registry.
Floor Area for 14 Grass Slade runs comfortably ahead of the street norm.
Price per m²
£1,739
Street avg £2,910
Floor Area
134 m²
Street avg 90 m²
Habitable Rooms
7 rooms
Crime
4/mo
Steady year-on-year across the wider district.
Nearest stop
0.2 km
BT Exchange — bus stop.

Daytime· 07:00 – 23:00
51.2dB

Changes detected from historical EPC data
Heating controls upgraded for better temperature management
Hot water system upgraded
More low energy lighting installed
Are we missing something? Tell us about home improvements to help adjust your valuation.
15 November 2013Most recent
£233,000
Median price across the last 5 sales in NN6 9HZ: £300,000 (2025–2021).
Street avg 5 rooms
CO₂ Emissions
3.4 t/year
Street avg 4.2 t/year
NN6 9BZ
Closest school
0.7 km
Brixworth CofE VC Primary School. 2 schools nearby.
Night-time· 23:00 – 07:00
41.0dB
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