4 Penstemon Close, London N3 1PW

End-Terrace house · Built 1991-1995 · 73 m² · Rented (Social) · Electric storage heaters

Upgrade Plan

FB for £13,725 · £3,431 a gradeGet upgrade quotes
MeasureGrantNet costSaving / yrPaybackGrade effect
Loft insulation£100 – £350£1251.8 yrs+3.6 pts
High-retention storage heaters£1,200 – £1,800£5162.9 yrs+14.9 pts · reaches E
Party wall insulation£300 – £600£1433.2 yrs+4.1 pts · reaches D
Floor insulation£800 – £1,200£2623.8 yrs+7.6 pts
Low energy lighting£50£114.4 yrs+0.3 pts
Cavity wall insulation£500 – £1,500£1965.1 yrs+5.6 pts · reaches C
Solar photovoltaic panels£3,500 – £5,500£24318.6 yrs+7.0 pts
Solar water heating£4,000 – £6,000£20324.6 yrs+5.9 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

£2,911
per year at grade F
£1,212
per year at grade B

The full plan saves £1,699 a year — a 12.4% annual return on £13,725.

Restated at the fuel prices assumed in July 2026. This certificate, assessed in 2019, states £1,775 a year at the prices assumed then. Modelled costs, 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
Moss Hall Junior SchoolPrimary0.3 mi
Moss Hall Infant SchoolPrimary0.4 mi
St Mary's CofE Primary SchoolPrimary0.5 mi
St Michael's Catholic Grammar SchoolSecondary0.6 miProgress 8 +0.98 · well above average (2023/24)
Finchley Catholic High SchoolSecondary1.0 miProgress 8 +0.94 · well above average (2023/24)
Bishop Douglass School FinchleySecondary1.2 miProgress 8 +0.43 · 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.

8
crimes a month
80
in the last 12 months
Anti-social behaviour
most common · 29% of the total

Police.uk street-level data for LSOA E01000303, 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.