4 Walnut Close, Harpenden AL5 4FP

Detached house · 2016 · 221 m² · Unknown · Boiler and radiators, mains gas

Upgrade Plan

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MeasureGrantNet costSaving / yrPaybackGrade effect
Solar photovoltaic panels(optional, beyond B)£5,000 – £8,000£0+5.0 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

£1,296
per year at grade B

Restated at the fuel prices assumed in July 2026. This certificate, assessed in 2019, states £816 a year at the prices assumed then. Modelled costs, not a bill.

Sold prices

24 April 2019£1,600,000

Estimated today: £2,000,959 HPI-indexed estimate, not a valuation

Walnut Close: 5 sales since 1995 · £1,640,000 average over 10 years

Schools nearby

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

SchoolPhaseDistanceProgress
Manland Primary SchoolPrimary0.2 mi
Crabtree Infants' SchoolPrimary0.5 mi
Crabtree Junior SchoolPrimary0.5 mi
Sir John Lawes SchoolSecondaryunder 0.1 miProgress 8 +0.79 · well above average (2023/24)
St George's SchoolSecondary0.3 miProgress 8 +0.65 · well above average (2023/24)
Katherine Warington SchoolSecondary0.6 miProgress 8 +0.48 · 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
64
in the last 12 months
Vehicle crime
most common · 25% of the total

Police.uk street-level data for LSOA E01023689, to 2026-06. An LSOA holds about 1,500 people, so this covers far more than one street.

Walnut Close

How this home sits against its street.

6
graded homes
83.5
average score
B
most common grade
-0.5
this home vs street
Energy data © Crown copyright, EPB Register© HM Land Registry, OGL v3We grade homes, never neighbourhoods.