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Get started1 Thornden is a three-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 1900-1929 and council tax band F. The latest certificate (September 2013) shows an E (score 47), well below the UK norm with real room to improve. The recommended improvements would lift it to B (score 81), a 3-band jump. Main heating runs on oil. The latest certificate is from September 2013, so improvements made since then won't be reflected.
Sale prices here have outpaced Horsham HPI: 4.4% per year against 0% for the wider region. Today's modelled estimate of £593,000 is 41.2% above the 2015 sale price. One planning record on file: an extension approved in 2018. Past consents include an extension and an annexe, meaningful when judging how the property has evolved. Last sold in February 2015, so it's been off the market for around 11 years.
1 Thornden's carbon output runs well above what efficient homes in the postcode produce.
This certificate is over 10 years old and is no longer valid.Expired 11 Sept 2023
Extension: Part single, part two storey
Erection of single storey rear extension and two storey side/rear extension to create an annex.
1 Thornden valuation sits well clear of the typical sold price in this postcode.
£593,000
Modelled from EPC, postcode comparables and a sale-price growth of 4.4% per year over 13 years.
£420,000
Growth on file: 4.4% per year over 13 years.
1 Thornden is notably below the street on epc rating.
Price per m²
£3,853
Street avg £5,674
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

13 February 2015Most recent
£420,000
+40.5%over 12 years25 September 2002
£299,000
+26.4%over 1 year31 August 2001
£236,500
Median price across the last 5 sales in RH13 8AG: £560,000 (2025–2021).
CO₂ Emissions
7.6 t/year
Street avg 6.4 t/year
RH13 8HQ
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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