1 The Hammonds, Hammondswick, Harpenden AL5 2NR

Detached house · 2011 · 759 m² · Boiler and underfloor heating, 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
Solar photovoltaic panels£11,000 – £20,000

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

Running costs

£2,802
per year at grade B

Restated at the fuel prices assumed in July 2026. This certificate, assessed in 2012, states £1,655 a year at the prices assumed then. Modelled costs, not a bill.

Sold prices

1 July 2020£3,830,000
12 April 2013£3,176,257

Estimated today: £4,677,623 HPI-indexed estimate, not a valuation

The Hammonds: 4 sales since 1995

Schools nearby

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

SchoolPhaseDistanceProgress
St Dominic Catholic Primary SchoolPrimary1.3 mi
The Grove Junior SchoolPrimary1.5 mi
The Grove Infant and Nursery SchoolPrimary1.5 mi
Townsend Church of England SchoolSecondary1.7 miProgress 8 +0.14 · average (2023/24)
Roundwood Park SchoolSecondary1.8 miProgress 8 +0.79 · well above average (2023/24)
St George's SchoolSecondary2.0 miProgress 8 +0.65 · 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.

4.4
crimes a month
31
in the last 12 months
Violence and sexual offences
most common · 29% of the total

Police.uk street-level data for LSOA E01023696, 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.