First Floor Flat, 1257 High Road, London N20 0EW

Not Recorded flat · Built 1930-1949 · 70 m² · Owner-Occupied · Boiler and radiators, mains gas

Upgrade Plan

DC for £9,685 · £9,685 a gradeGet upgrade quotes
MeasureGrantNet costSaving / yrPaybackGrade effect
Draughtproofing£150 – £250£1351.5 yrs+3.8 pts
Heating controls£220 – £250£584.0 yrs+1.6 pts
Solid wall insulation£7,500 – £11,000£17350+ yrs+4.9 pts · reaches C
Double glazing(optional, beyond C)£4,500 – £6,000£5850+ yrs+1.6 pts

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

£1,384
per year at grade D
£960
per year at grade C

The full plan saves £366 a year — a 3.8% annual return on £9,685.

Energy costs as modelled on the certificate, not a bill.

Sold prices

No sale recorded for this address since 1995.

Schools nearby

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

SchoolPhaseDistanceProgress
Alma PrimaryPrimary0.2 mi
All Saints' CofE Nursery and Primary School N20Primary0.3 mi
St John's CofE Primary and Nursery SchoolPrimary0.3 mi
Finchley Catholic High SchoolSecondary0.6 miProgress 8 +0.94 · well above average (2023/24)
St Andrew the Apostle Greek Orthodox SchoolSecondary1.0 miProgress 8 +0.40 · above average (2023/24)
St Michael's Catholic Grammar SchoolSecondary1.1 miProgress 8 +0.98 · well 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.

19.9
crimes a month
219
in the last 12 months
Violence and sexual offences
most common · 23% of the total

Police.uk street-level data for LSOA E01000281, to 2026-06. An LSOA holds about 1,500 people, so this covers far more than one street.

Energy data © Crown copyright, EPB Register© HM Land Registry, OGL v3We grade homes, never neighbourhoods.