86 Knightsfield, Welwyn Garden City AL8 7HB

Semi-Detached flat · Built 1950-1966 · 68 m² · Owner-Occupied · Boiler and radiators, mains gas

Upgrade Plan

DC for £100 · £100 a gradeGet upgrade quotes
MeasureGrantNet costSaving / yrPaybackGrade effect
Draughtproofing£80 – £120£1670.6 yrs+4.5 pts · reaches C
Loft insulation(optional, beyond C)£100 – £350£952.4 yrs+2.5 pts
Double glazing(optional, beyond C)£3,300 – £6,500£7250+ yrs+1.9 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

£1,111
per year at grade D
£777
per year at grade C

The full plan saves £167 a year — a 167.0% annual return on £100.

Restated at the fuel prices assumed in July 2026. This certificate, assessed in 2025, states £935 a year at the prices assumed then. Modelled costs, not a bill.

Sold prices

20 October 2025£295,250
23 September 2015£250,000
12 November 1999£82,000
17 January 1997£57,500

Estimated today: £297,749 HPI-indexed estimate, not a valuation

Knightsfield: 286 sales since 1995 · £467,244 average over 10 years

Schools nearby

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

SchoolPhaseDistanceProgress
Harwood Hill Junior Mixed Infant and Nursery SchoolPrimary0.3 mi
Templewood Primary SchoolPrimary0.4 mi
Homerswood Primary and Nursery SchoolPrimary0.4 mi
Monk's Walk SchoolSecondary0.7 miProgress 8 +0.24 · above average (2023/24)
Ridgeway AcademySecondary1.2 miProgress 8 -0.47 · below average (2023/24)
Stanborough SchoolSecondary1.7 miProgress 8 +0.18 · 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.

5.4
crimes a month
59
in the last 12 months
Violence and sexual offences
most common · 53% of the total

Police.uk street-level data for LSOA E01023961, to 2026-06. An LSOA holds about 1,500 people, so this covers far more than one street.

Knightsfield

How this home sits against its street.

197
graded homes
65.1
average score
C
most common grade
+1.9
this home vs street
Energy data © Crown copyright, EPB Register© HM Land Registry, OGL v3We grade homes, never neighbourhoods.