91a St. Johns Avenue, London NW10 4EJ

Mid-Terrace flat · Built 1930-1949 · 46 m² · Owner-Occupied · Boiler and radiators, mains gas

Upgrade Plan

Get upgrade quotes
MeasureGrantNet costSaving / yrPaybackGrade effect
Floor insulation(optional, beyond C)£800 – £1,200£5418.5 yrs+2.2 pts
Band A condensing boiler(optional, beyond C)£2,200 – £3,000£3350+ yrs+1.4 pts
Solid wall insulation(optional, beyond C)£4,000 – £14,000£5950+ yrs+2.4 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

£688
per year at grade C
£542
per year at grade C

Restated at the fuel prices assumed in July 2026. This certificate, assessed in 2022, states £414 a year at the prices assumed then. Modelled costs, not a bill.

Sold prices

30 October 2024£330,000
1 February 2008£246,000
17 January 2003£177,500
2 July 2001£114,000
30 June 1997£62,950
8 March 1996£54,000

Estimated today: £299,053 HPI-indexed estimate, not a valuation

St Johns Avenue: 591 sales since 1995 · £757,145 average over 10 years

Schools nearby

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

SchoolPhaseDistanceProgress
John Keble CofE Primary SchoolPrimary0.2 mi
Leopold Primary SchoolPrimary0.2 mi
Newfield Primary SchoolPrimary0.2 mi
Saint Claudine's Catholic School for GirlsSecondary0.2 miProgress 8 +0.80 · well above average (2023/24)
Newman Catholic CollegeSecondary0.5 miProgress 8 -0.21 · below average (2023/24)
Harris Lowe Academy WillesdenSecondary0.7 miProgress 8 +0.23 · 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.

45.7
crimes a month
503
in the last 12 months
Anti-social behaviour
most common · 37% of the total

Police.uk street-level data for LSOA E01000523, to 2026-06. An LSOA holds about 1,500 people, so this covers far more than one street.

St Johns Avenue

How this home sits against its street.

383
graded homes
67.8
average score
C
most common grade
+5.2
this home vs street
Energy data © Crown copyright, EPB Register© HM Land Registry, OGL v3We grade homes, never neighbourhoods.