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Get started27 Thornden is a three-bedroom detached house in Cowfold, Horsham, Horsham (RH13 8AG). It has a recorded floor area of 43 m² (around 463 sq ft), construction records dating it to 1950-1966 and council tax band F. The latest certificate (June 2014) shows an F (score 30), near the bottom of the EPC scale. The recommended improvements would lift it to C (score 73), a 3-band jump. Main heating runs on lpg. The latest certificate is from June 2014, so improvements made since then won't be reflected.
At 43 m² it sits well below the postcode median (119 m² across 12 EPCs), making it one of the more compact homes locally. On energy efficiency it sits in the bottom 10% of properties in this postcode — significant headroom for improvement. Today's modelled estimate of £908,000 sits 97.7% above the 2014 sale of £459,250. On a £-per-square-foot basis, the last sale (£992/sq ft) was about 193.3% above the typical sold price in the postcode. 2 planning records sit against the property, 2 approved, 0 refused. Past consents include an extension, a porch and a loft conversion, meaningful when judging how the property has evolved. Last sold in August 2014, so it's been off the market for around 12 years.
27 Thornden sits at the bottom of the postcode for energy efficiency — meaningful headroom to improve.
This certificate is over 10 years old and is no longer valid.Expired 11 Jun 2024
Planning history includes both a loft conversion and an extension — the classic family-home expansion.
Extension: Front of property
Erection of a front porch
27 Thornden valuation sits well clear of the typical sold price in this postcode.
£908,000
Modelled from EPC, postcode comparables.
£459,250
Recorded with HM Land Registry.
27 Thornden is notably below the street on epc rating.
Price per m²
£10,680
Street avg £5,105
Floor Area
43 m²
Street avg 131 m²
Habitable Rooms
4 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

Daytime· 07:00 – 23:00
49.6dB

Extension: Single storey · Rear of property
Single storey rear extension and loft conversion with internal alterations and dormers
28 August 2014Most recent
£459,250
Median price across the last 5 sales in RH13 8AG: £560,000 (2025–2021).
CO₂ Emissions
3.9 t/year
Street avg 6.7 t/year
RH13 8NF
Brook Farm — bus stop.
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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