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Get started33 Thornden is a two-bedroom detached house in Cowfold, Horsham, Horsham (RH13 8AG). It has a recorded floor area of 109 m² (around 1173 sq ft), construction records dating it to 1950-1966 and council tax band F. The latest certificate (July 2019) shows an E (score 49), well below the UK norm with real room to improve. The rating has held steady at E across 2 certificates since July 2009. Between certificates, lighting went from Poor to Very Good; while wall efficiency dropped from Good to Average and hot-water efficiency dropped from Average to Poor. The recommended improvements would lift it to C (score 75), a 2-band jump. Main heating runs on oil.
One planning record on file: an extension approved in 2025. Past consents include an extension and partial demolition, meaningful when judging how the property has evolved. On a £-per-square-foot basis, the last sale (£469/sq ft) was about 38.6% above the typical sold price in the postcode. Sold August 2023 for £550,000.
33 Thornden's carbon output runs well above what efficient homes in the postcode produce.
Planning history includes recorded demolition works, indicating a major rebuild phase at this address.
Single storey · Rear of property
33 Thornden valuation sits well clear of the typical sold price in this postcode.
£600,000
Modelled from EPC, postcode comparables.
£550,000
Recorded with HM Land Registry.
On years held, 33 Thornden runs well behind the street norm.
Price per m²
£5,046
Street avg £5,575
Floor Area
109 m²
Street avg 126 m²
Habitable Rooms
5 rooms
Street avg 5 rooms
Daytime road noise here sits well below conversation level — a quiet pocket of the postcode.
Crime
3/mo
Steady year-on-year across the wider district.
Nearest stop
0.4 km
Brook Farm — bus stop.

Daytime· 07:00 – 23:00
49.6dB

Changes detected from historical EPC data
Hot water efficiency decreased
More low energy lighting installed
Are we missing something? Tell us about home improvements to help adjust your valuation.
Demolition of existing conservatory and erection of a single storey rear extension.
22 August 2023Most recent
£550,000
Median price across the last 5 sales in RH13 8AG: £560,000 (2025–2021).
CO₂ Emissions
6.6 t/year
Street avg 6.5 t/year
RH13 8QN
Closest school
0.3 km
St Peter's CofE (Aided) Primary School. 1 school nearby.
Night-time· 23:00 – 07:00
43.4dB
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