9 Thornden, Cowfold, Horsham, RH13 8AG
About 9 Thornden
9 Thornden is a four-bedroom detached house in Cowfold, Horsham, Horsham (RH13 8AG). It has a recorded floor area of 38 m² (around 409 sq ft), construction records dating it to 1950-1966 and council tax band G. The latest certificate (July 2023) shows a D (score 57), a step below the typical UK home. When first surveyed in December 2010 the rating was F, the property has climbed 2 bands since. Between certificates, wall efficiency went from Poor to Good, roof efficiency went from Poor to Average and lighting went from Poor to Very Good; while window efficiency dropped from Good to Average. The recommended improvements would lift it to B (score 90), a 2-band jump. Main heating runs on oil. Other recorded features include a self-contained annexe.
At 38 m² it sits well below the postcode median (119 m² across 12 EPCs), making it one of the more compact homes locally. Last sold in November 2016, so it's been off the market for around 10 years. Across the public record there are 4 sales, relatively high churn for a single property. 3 planning records sit against the property, 3 approved, 0 refused. Past consents include an extension and a conservatory, meaningful when judging how the property has evolved. Across 1996–2016, sale prices on this property compounded at 6.4% per year. Today's modelled estimate of £777,000 is 24.3% above the 2016 sale price. On a £-per-square-foot basis, the last sale (£1,528/sq ft) was about 392.2% above the typical sold price in the postcode.
What this property has
Inside
- Bedrooms4
- Bathrooms3
- Open-plan layoutYes
- Dining roomYes
- FireplaceYes
Outside
- Private gardenYes
- DrivewayYes
Energy performance
Recommended upgrades on file would lift this property by multiple EPC bands.
EPC Rating
Property Improvements
Changes detected from historical EPC data
Hot water efficiency improved
Cavity wall insulation installed
Roof insulation improved
More low energy lighting installed
Heating controls changed
Hot water system changed
Wall insulation improved
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 £1,220 · Includes VAT
Planning history
9 Thornden has an approved side extension on the planning record.
3 applications on record at 9 Thornden, Cowfold, Horsham, RH13 8AG
- Dec 2003ConservatoryFullOutcome in report
Extension: Two storey · Side of property
2-storey side extension and conservatorySite: 9 Thornden Cowfold
Extension- Reference
- CF/45/03
- More recent applications — locked
- ExtensionMay 2009Decision
- ConservatoryDec 2008Decision
Unlock 9 Thornden, Cowfold, Horsham, RH13 8AG's full planning history
You're seeing the shape of it. The report has the substance.
- Every decision — granted, refused or withdrawn (3 on record)
- All 3 applications on this property in full, plus 9 notable nearby
- The 11 documents, officer reports & conditions
- What the pattern means for extending or converting here
One time fee only - money back guarantee
Sales history & valuation
9 Thornden has more than tripled in price since its earliest registered sale in 1996.
£777,000
Modelled from EPC, postcode comparables and a sale-price growth of 6.4% per year over 21 years.
£625,000
Growth on file: 6.4% per year over 21 years.
Sales timeline
18 November 2016Most recent
£625,000
+5.0%over 8 years27 March 2008
£595,000
+138.0%over 6 years27 September 2001
£250,000
+42.9%over 5 years21 March 1996
£175,000
Median price across the last 5 sales in RH13 8AG: £560,000 (2025–2021).
Nearby sales in RH13 8AG
35 Thornden, Cowfold, Horsham, RH13 8AG
Sold Mar 2025
£560,00037 Thornden, Cowfold, Horsham, RH13 8AG
Sold Feb 2025
£532,50033 Thornden, Cowfold, Horsham, RH13 8AG
Sold Aug 2023
£550,00011 Thornden, Cowfold, Horsham, RH13 8AG
Sold Jun 2021
£675,00031 Thornden, Cowfold, Horsham, RH13 8AG
Sold Jan 2021
£560,000
Versus other Thornden homes
On price per m², 9 Thornden stands well clear of the street.
Price per m²
£16,447
Street avg £4,625
Floor Area
38 m²
Street avg 132 m²
Habitable Rooms
2 rooms
Street avg 5 rooms
CO₂ Emissions
3.1 t/year
Street avg 6.8 t/year
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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
3/mo
Steady year-on-year across the wider district.
Nearest stop
0.4 km
Brook Farm — bus stop.
Closest school
0.3 km
St Peter's CofE (Aided) Primary School. 1 school 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
49.6dB

Night-time· 23:00 – 07:00
43.4dB







