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Get started12 Harrowby Lane is a four-bedroom semi-detached house in Harrowby, Grantham, Grantham (NG31 9HB). It has a recorded floor area of 144 m² (around 1550 sq ft), construction records dating it to 1930-1949 and council tax band C. The latest certificate (November 2015) shows a D (score 60), on the cusp of jumping into the C band. When first surveyed in April 2010 the rating was E, the property has climbed 1 band since. Between certificates, roof efficiency went from Average to Good; while wall efficiency dropped from Good to Poor. The recommended improvements would push it to C (score 78). The latest certificate is from November 2015, so improvements made since then won't be reflected.
Sale prices here have outpaced England HPI: 7.9% per year against 0% for the wider region. Today's modelled estimate of £339,000 is 35.6% above the 2013 sale price. 6 planning records sit against the property, 4 approved, 2 refused. Past consents include an extension and change of use to residential, meaningful when judging how the property has evolved. At 144 m² it's 26.3% larger than the typical home in the postcode (114 m² median across 11 EPCs). 12 years since the last transfer (December 2013).
12 Harrowby Lane's carbon output runs well above what efficient homes in the postcode produce.
This certificate is over 10 years old and is no longer valid.Expired 24 Nov 2025
12 Harrowby Lane has 2 separate extension applications on the council record.
Conversion of brewery to domestic accommodation including extensions and alterations
Price for 12 Harrowby Lane has grown more than fourfold since the 1995 starting point.
£339,000
Modelled from EPC, postcode comparables and a sale-price growth of 7.9% per year over 18 years.
£250,000
Growth on file: 7.9% per year over 18 years.
On price per m², 12 Harrowby Lane runs well behind the street norm.
Price per m²
£1,736
Street avg £2,590
Floor Area
144 m²
Street avg 137 m²
Habitable Rooms
5 rooms
Street avg 6 rooms
Daytime road noise here sits well below conversation level — a quiet pocket of the postcode.
Crime
8/mo
Steady year-on-year across the wider district.
Nearest stop
0.1 km
Newgate Lane — bus stop.

Daytime· 07:00 – 23:00
43.5dB

Changes detected from historical EPC data
Low energy lighting percentage decreased
Wall insulation improved
Roof insulation improved
More low energy lighting installed
Are we missing something? Tell us about home improvements to help adjust your valuation.
Conversion of brewery to domestic accommodation including extensions and alterations
4 more applications for this property
Join to see all planning history.
20 December 2013Most recent
£250,000
+300.0%over 18 years2 October 1995
£62,500
Median price across the last 5 sales in NG31 9HB: £350,000 (2025–2022).
CO₂ Emissions
7.0 t/year
Street avg 6.0 t/year
NG31 9TB
Closest school
1.4 km
Belmont Community Primary School. 8 schools nearby.
Night-time· 23:00 – 07:00
36.4dB
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