4 Hyde Close, Harpenden AL5 4NB

Semi-Detached maisonette · Built 1967-1975 · 55 m² · Owner-Occupied · Electric storage heaters

Upgrade Plan

DC for £1,830 · £1,830 a gradeGet upgrade quotes
MeasureGrantNet costSaving / yrPaybackGrade effect
Hot water cylinder insulation£30£1460.2 yrs+3.9 pts
High-performance doors£1,000 – £0£1373.7 yrs+3.6 pts
High-retention storage heaters£1,800 – £800£3373.9 yrs+8.9 pts · reaches C
Low energy lighting(optional, beyond C)£30£74.0 yrs+0.2 pts
Cavity wall insulation(optional, beyond C)£1,500 – £500£1287.8 yrs+3.4 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

£1,615
per year at grade D
£860
per year at grade C

The full plan saves £620 a year — a 33.9% annual return on £1,830.

Restated at the fuel prices assumed in July 2026. This certificate, assessed in 2018, states £965 a year at the prices assumed then. Modelled costs, not a bill.

Sold prices

10 March 2025£305,000
26 January 2006£175,000
14 November 2003£145,000
16 July 2001£116,750
24 March 1995£52,950

Estimated today: £308,379 HPI-indexed estimate, not a valuation

Hyde Close: 21 sales since 1995 · £317,500 average over 10 years

Schools nearby

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

SchoolPhaseDistanceProgress
The Lea Primary School and NurseryPrimary0.3 mi
Manland Primary SchoolPrimary0.4 mi
Sauncey Wood Primary SchoolPrimary0.5 mi
Sir John Lawes SchoolSecondary0.5 miProgress 8 +0.79 · well above average (2023/24)
St George's SchoolSecondary0.5 miProgress 8 +0.65 · well above average (2023/24)
Katherine Warington SchoolSecondary0.8 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.

9
crimes a month
99
in the last 12 months
Anti-social behaviour
most common · 34% of the total

Police.uk street-level data for LSOA E01023693, to 2026-06. An LSOA holds about 1,500 people, so this covers far more than one street.

Hyde Close

How this home sits against its street.

9
graded homes
55
average score
D
most common grade
+1.0
this home vs street
Energy data © Crown copyright, EPB Register© HM Land Registry, OGL v3We grade homes, never neighbourhoods.