20 Northolme, Gainsborough DN21 2JD

Semi-Detached house · Built 1900-1929 · 137 m² · Rented (Private) · Boiler and radiators, mains gas

Upgrade Plan

DB for £11,500 · £5,750 a gradeGet upgrade quotes
MeasureGrantNet costSaving / yrPaybackGrade effect
Floor insulation£1,200 – £200£2093.3 yrs+5.7 pts
Loft insulation£350£1003.5 yrs+2.7 pts
Heating controls£450£765.9 yrs+2.1 pts · reaches C
Solar photovoltaic panels£5,500 – £500£19315.5 yrs+5.3 pts
Solid wall insulation£14,000 – £0£22631.0 yrs+6.2 pts · reaches B

Grants verified 20 August 2026. Costs are the register’s indicative ranges. Savings are restated at the fuel prices assumed in July 2026. Points per measure are estimated from 19.9 million certificates and rescaled to this home’s own certificate delta; the total is the register’s figure.

Running costs

£2,209
per year at grade D
£1,405
per year at grade B

The full plan saves £804 a year — a 7.0% annual return on £11,500.

Restated at the fuel prices assumed in July 2026. This certificate, assessed in 2020, states £1,413 a year at the prices assumed then. Modelled costs, not a bill.

Sold prices

29 September 2021£135,000
21 September 2017£118,000
10 March 2006£129,950
11 February 1999£38,000

Estimated today: £154,853 HPI-indexed estimate, not a valuation

Northolme: 56 sales since 1995 · £154,318 average over 10 years

Schools nearby

The schools’ own performance — Progress 8 shows value added, not just raw results.

SchoolPhaseDistanceProgress
The Gainsborough Parish Church Primary SchoolPrimary0.2 mi
White's Wood AcademyPrimary0.5 mi
Castle Wood AcademyPrimary0.5 mi
The Queen Elizabeth's High School, GainsboroughSecondary0.7 miProgress 8 +0.26 · above average (2023/24)
The Gainsborough AcademySecondary0.8 miProgress 8 -0.81 · well below average (2023/24)
South Axholme AcademySecondary8.6 miProgress 8 +0.21 · above average (2023/24)

Schools from the DfE register, performance from the KS4 performance tables. Progress 8 is a GCSE measure, so primaries have none. Distance is straight-line from the postcode, not a catchment: admission is decided by the school, not by us.

Area context

Police-recorded crime for the wider neighbourhood, not this address. We grade homes, never neighbourhoods — so this is reported as a count, not a rating.

16.4
crimes a month
180
in the last 12 months
Violence and sexual offences
most common · 41% of the total

Police.uk street-level data for LSOA E01026379, to 2026-06. An LSOA holds about 1,500 people, so this covers far more than one street.

Northolme

How this home sits against its street.

24
graded homes
57.2
average score
D
most common grade
+1.8
this home vs street
Energy data © Crown copyright, EPB Register© HM Land Registry, OGL v3We grade homes, never neighbourhoods.