Flat 1, 91 Onslow Gardens, London SW7 3BU

Detached flat · Built 1900-1929 · 74 m² · Boiler and radiators, mains gas

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This certificate lists these measures but records the same score with and without them, so there is no saving or rating gain to attribute to any one of them. That usually means the assessment was incomplete — here the assessor recorded no heating system at all. The costs below are real; a fresh assessment would be the way to find the gain.

MeasureGrantNet costSaving / yrPaybackGrade effect
Double glazing£2,500 – £6,500
Solid wall insulation£5,500 – £14,500

Grants verified 20 August 2026. Costs are the register’s indicative ranges.

Running costs

£1,007
per year at grade C

Restated at the fuel prices assumed in July 2026. This certificate, assessed in 2012, states £611 a year at the prices assumed then. Modelled costs, not a bill.

Sold prices

No sale recorded for this address since 1995.

Onslow Gardens: 1,053 sales since 1995 · £1,445,925 average over 10 years

Schools nearby

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

SchoolPhaseDistanceProgress
Our Lady of Victories RC Primary SchoolPrimary0.2 mi
Bousfield Primary SchoolPrimary0.3 mi
Oratory Roman Catholic Primary SchoolPrimary0.4 mi
St. Thomas More Language CollegeSecondary0.7 miAttainment 8 45.9 · no Progress 8 published
The London Oratory SchoolSecondary0.8 miProgress 8 +0.62 · well above average (2023/24)
Chelsea AcademySecondary0.9 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.

19.2
crimes a month
211
in the last 12 months
Violence and sexual offences
most common · 24% of the total

Police.uk street-level data for LSOA E01035714, to 2026-06. An LSOA holds about 1,500 people, so this covers far more than one street.

Onslow Gardens

How this home sits against its street.

580
graded homes
63.1
average score
D
most common grade
+5.9
this home vs street
Energy data © Crown copyright, EPB Register© HM Land Registry, OGL v3We grade homes, never neighbourhoods.