21b Kinsbourne Close, Harpenden AL5 3PB

Semi-Detached maisonette · Built 2012 onwards · 72 m² · Owner-Occupied · Boiler and underfloor heating, mains gas

Upgrade Plan

This certificate lists no outstanding recommendations.

Running costs

£670
per year at grade B

Restated at the fuel prices assumed in July 2026. This certificate, assessed in 2025, states £548 a year at the prices assumed then. Modelled costs, not a bill.

Sold prices

20 September 2013£280,000

Estimated today: £411,596 HPI-indexed estimate, not a valuation

Kinsbourne Close: 43 sales since 1995 · £730,882 average over 10 years

Schools nearby

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

SchoolPhaseDistanceProgress
Wood End SchoolPrimary0.3 mi
Roundwood Primary SchoolPrimary0.9 mi
The Lea Primary School and NurseryPrimary1.3 mi
Roundwood Park SchoolSecondary0.9 miProgress 8 +0.79 · well above average (2023/24)
St George's SchoolSecondary1.5 miProgress 8 +0.65 · well above average (2023/24)
Sir John Lawes SchoolSecondary1.7 miProgress 8 +0.79 · 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.

4
crimes a month
24
in the last 12 months
Violence and sexual offences
most common · 29% of the total

Police.uk street-level data for LSOA E01023694, to 2026-05. An LSOA holds about 1,500 people, so this covers far more than one street.

Kinsbourne Close

How this home sits against its street.

19
graded homes
61.3
average score
D
most common grade
+19.7
this home vs street
Energy data © Crown copyright, EPB Register© HM Land Registry, OGL v3We grade homes, never neighbourhoods.