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Get started20 Thorndon Avenue is a three-bedroom semi-detached house in West Horndon, Brentwood, Brentwood (CM13 3TT). It has a recorded floor area of 103 m² (around 1109 sq ft), construction records dating it to 1930-1949 and council tax band E. The latest certificate (October 2025) shows a D (score 67), on the cusp of jumping into the C band. The rating has held steady at D across 2 certificates since July 2014. Between certificates, wall efficiency went from Very Poor to Poor and lighting went from Average to Very Good; while window efficiency dropped from Good to Average. The recommended improvements would push it to C (score 79). Other recorded features include outbuildings and a loft. Our model identifies extension potential, subject to local planning policy.
Sale prices here have outpaced Brentwood HPI: 3.3% per year against 0% for the wider region. Today's modelled estimate of £596,000 sits 80.6% above the 2014 sale of £330,000. One planning record on file: an extension approved in 2006. Past consents include an extension and a conservatory, meaningful when judging how the property has evolved. 12 years since the last transfer (November 2014).
20 Thorndon Avenue has an approved single-storey rear extension on the planning record.
20 Thorndon Avenue valuation sits well clear of the typical sold price in this postcode.
£596,000
Modelled from EPC, postcode comparables and a sale-price growth of 3.3% per year over 9 years.
£330,000
Growth on file: 3.3% per year over 9 years.
On co₂ emissions, 20 Thorndon Avenue stands well clear of the street.
Price per m²
£3,204
Street avg £4,071
Floor Area
103 m²
Street avg 117 m²
Habitable Rooms
4 rooms
Rail-style transport is unusually close for this postcode.
Crime
4/mo
Steady year-on-year across the wider district.
Nearest stop
0.7 km
Clavering Gardens — bus stop.

Daytime· 07:00 – 23:00
55.5dB

Changes detected from historical EPC data
Wall insulation improved
Roof insulation improved
More low energy lighting installed
Are we missing something? Tell us about home improvements to help adjust your valuation.
Extension: Single storey · Rear of property
Single Storey Rear Conservatory
6 November 2014Most recent
£330,000
+33.6%over 8 years7 December 2005
£247,000
Median price across the last 5 sales in CM13 3TT: £660,000 (2025–2022).
60 Thorndon Avenue West Horndon Brentwood
Sold Jun 2025
7 Thorndon Avenue West Horndon Brentwood
Sold Oct 2024
54 Thorndon Avenue West Horndon Brentwood
Sold Aug 2024
5 Thorndon Avenue West Horndon Brentwood
Sold Aug 2024
40 Thorndon Avenue West Horndon Brentwood
Sold Sept 2022
Street avg 5 rooms
CO₂ Emissions
3.3 t/year
Street avg 5.3 t/year
CM13 3QA
Closest school
0.4 km
West Horndon Primary School. 2 schools nearby.
Night-time· 23:00 – 07:00
49.5dB
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