20 High Street, Chrishall, Royston SG8 8RP

Detached house · Built 1976-1982 · 178 m² · Owner-Occupied · Boiler and radiators, oil

Upgrade Plan

EC for £13,325 · £6,663 a gradeGet upgrade quotes
MeasureGrantNet costSaving / yrPaybackGrade effect
Loft insulation£100 – £350£932.4 yrs+2.6 pts
Cavity wall insulation£500 – £1,500£1466.8 yrs+4.1 pts · reaches D
Band A condensing boiler£2,200 – £3,000£12021.6 yrs+3.4 pts
Solar photovoltaic panels£3,500 – £5,500£18124.9 yrs+5.1 pts
Floor insulation£4,000 – £6,000£19625.6 yrs+5.5 pts · reaches C
Solar water heating(optional, beyond C)£4,000 – £6,000£15232.9 yrs+4.3 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

£2,556
per year at grade E
£1,668
per year at grade C

The full plan saves £736 a year — a 5.5% annual return on £13,325.

Restated at the fuel prices assumed in July 2026. This certificate, assessed in 2023, states £2,801 a year at the prices assumed then. Modelled costs, not a bill.

Sold prices

22 January 2018£550,000
1 August 2008£435,000
31 October 2000£260,000
30 January 1997£139,000

Estimated today: £668,919 HPI-indexed estimate, not a valuation

High Street: 82 sales since 1995 · £524,688 average over 10 years

Schools nearby

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

SchoolPhaseDistanceProgress
Chrishall Holy Trinity and St Nicholas CofE (Aided) Primary School and Pre-SchoolPrimary0.1 mi
Barley (VA) Church of England First SchoolPrimary2.7 mi
Fowlmere Primary SchoolPrimary4.4 mi
Melbourn Village CollegeSecondary5.3 miProgress 8 -0.48 · below average (2023/24)
Saffron Walden County High SchoolSecondary5.5 miProgress 8 +0.28 · above average (2023/24)
Joyce Frankland Academy, NewportSecondary5.5 miProgress 8 -0.23 · below 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.

4.6
crimes a month
41
in the last 12 months
Violence and sexual offences
most common · 34% of the total

Police.uk street-level data for LSOA E01022098, to 2026-06. An LSOA holds about 1,500 people, so this covers far more than one street.

High Street

How this home sits against its street.

30
graded homes
52.7
average score
E
most common grade
-1.7
this home vs street
Energy data © Crown copyright, EPB Register© HM Land Registry, OGL v3We grade homes, never neighbourhoods.