21 Parkfields, Welwyn Garden City AL8 6EE

Detached house · Built 1930-1949 · 125 m² · Owner-Occupied · Boiler and radiators, mains gas

Upgrade Plan

DC for £6,525 · £6,525 a gradeGet upgrade quotes
MeasureGrantNet costSaving / yrPaybackGrade effect
Low energy lighting£25£64.2 yrs+0.2 pts
Cavity wall insulation£500 – £1,500£1019.9 yrs+3.2 pts
Room-in-roof insulation£1,500 – £2,700£18611.3 yrs+5.9 pts
Floor insulation£800 – £6,000£13525.2 yrs+4.3 pts · reaches C
Solar photovoltaic panels(optional, beyond C)£3,500 – £5,500£12536.0 yrs+4.0 pts
Solar water heating(optional, beyond C)£4,000 – £6,000£10547.7 yrs+3.3 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

£2,076
per year at grade D
£1,418
per year at grade C

The full plan saves £428 a year — a 6.6% annual return on £6,525.

Restated at the fuel prices assumed in July 2026. This certificate, assessed in 2020, states £1,329 a year at the prices assumed then. Modelled costs, not a bill.

Sold prices

6 August 2020£779,000
5 January 2012£585,000
28 June 1996£99,950

Estimated today: £872,161 HPI-indexed estimate, not a valuation

Parkfields: 33 sales since 1995 · £720,119 average over 10 years

Schools nearby

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

SchoolPhaseDistanceProgress
Applecroft SchoolPrimary0.4 mi
Peartree Primary SchoolPrimary0.4 mi
Our Lady Catholic Primary SchoolPrimary0.6 mi
Stanborough SchoolSecondary0.8 miProgress 8 +0.18 · average (2023/24)
Ridgeway AcademySecondary1.3 miProgress 8 -0.47 · below average (2023/24)
Monk's Walk SchoolSecondary1.4 miProgress 8 +0.24 · 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.

103.2
crimes a month
1,135
in the last 12 months
Shoplifting
most common · 36% of the total

Police.uk street-level data for LSOA E01023918, to 2026-06. An LSOA holds about 1,500 people, so this covers far more than one street.

Parkfields

How this home sits against its street.

12
graded homes
60.9
average score
D
most common grade
-3.9
this home vs street
Energy data © Crown copyright, EPB Register© HM Land Registry, OGL v3We grade homes, never neighbourhoods.