20a, Mashbury Road, Great Waltham, Chelmsford, CM3 1EN
About 20a
20a is a two-bedroom semi-detached house in Great Waltham, Chelmsford, Chelmsford (CM3 1EN). It has a recorded floor area of 51 m² (around 549 sq ft), construction records dating it to 1950-1966 and council tax band A. The latest certificate (January 2025) shows a D (score 60), on the cusp of jumping into the C band. Earlier certificates rated it C (February 2015); the latest reading is one band lower. Between certificates, wall efficiency dropped from Good to Average and window efficiency dropped from Good to Average. Main heating runs on electricity.
At 51 m² it sits well below the postcode median (74 m² across 28 EPCs), making it one of the more compact homes locally. Last sold in June 2015, so it's been off the market for around 11 years. Today's modelled estimate of £197,000 is 34% above the 2015 sale price.
What this property has
Inside
- Bedrooms2
Energy performance
EPC Rating
Property Improvements
Changes detected from historical EPC data
Changed to a more efficient fuel source
Heating controls changed
Hot water efficiency decreased
Get a survey for this property
Level 3 Building Survey
Because the property has no mains gas supply, we believe a Level 3 building survey should be considered.
From £820 · Includes VAT
Planning history
20a has no planning applications on record.
But the area is active
1 notable application nearby — larger schemes and conversions that could reshape the street. The report maps them all.
Sales history & valuation
£197,000
Modelled from EPC, postcode comparables.
£147,000
Recorded with HM Land Registry.
Sales timeline
11 June 2015Most recent
£147,000
Median price across the last 5 sales in CM3 1EN: £317,000 (2024–2018).
Nearby sales in CM3 1EN
2 Mashbury Road, Great Waltham, Chelmsford, CM3 1EN
Sold Dec 2024
£236,50016 Mashbury Road, Great Waltham, Chelmsford, CM3 1EN
Sold Aug 2023
£343,00011 Mashbury Road, Great Waltham, Chelmsford, CM3 1EN
Sold Mar 2021
£350,0005 Mashbury Road, Great Waltham, Chelmsford, CM3 1EN
Sold Aug 2020
£317,00030 Mashbury Road, Great Waltham, Chelmsford, CM3 1EN
Sold Jul 2016
£600,000
Versus other Mashbury Road homes
On epc rating, 20a stands well clear of the street.
EPC Rating
60 (D)
Street avg 57 (D)
Floor Area
51 m²
Street avg 46 m²
CO₂ Emissions
3.0 t/year
Street avg 3.0 t/year
Habitable Rooms
3 rooms
Street avg 3 rooms
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The neighbourhood at a glance
Daytime road noise here sits well below conversation level — a quiet pocket of the postcode.
Crime
1/mo
Steady year-on-year across the wider district.
Nearest stop
0.7 km
Crowbush House — bus stop.
Closest school
0.7 km
Great Waltham Church of England Voluntary Controlled Primary School. 2 schools nearby.
Go deeper on the local area
A Local Area report breaks down crime, transport links, schools and air quality in depth.
Road noise across the postcode

Daytime· 07:00 – 23:00
42.3dB

Night-time· 23:00 – 07:00
35.6dB







