Newnhams Rough, Birch Grove, Horsted Keynes, Haywards Heath, RH17 7BT
About Newnhams Rough
Newnhams Rough is a detached house in Horsted Keynes, Haywards Heath, Haywards Heath (RH17 7BT). It has a recorded floor area of 805 m² (around 8665 sq ft), construction records dating it to 1930-1949 and council tax band H. The latest certificate (June 2016) shows a C (score 80), near the top of the C band. When first surveyed in March 2011 the rating was F, the property has climbed 3 bands since. Between certificates, wall efficiency went from Poor to Very Good, roof efficiency went from Very Poor to Good and window efficiency went from Very Poor to Very Good. The recommended improvements would push it to B (score 84). Main heating runs on electricity: electricity, unspecified tariff. The latest certificate is from June 2016, so improvements made since then won't be reflected.
At 805 m² the property is well over the postcode median (123 m² across 9 EPCs), placing it in the larger end of the local stock. On energy efficiency it sits in the top 10% of properties in this postcode. Across 2013–2020, sale prices on this property compounded at -49% per year. Today's modelled estimate of £3,378,000 sits 22420% above the 2020 sale of £15,000. On a £-per-square-foot basis, the last sale (£2/sq ft) was about 99.6% below the postcode norm. 2 planning records sit against the property, 0 approved, 0 refused. Sold October 2020 for £15,000.
Know exactly what you're buying at Newnhams Rough
Before you offer, see what the listing won't tell you, the true value, the red flags and the full history.
Already flagged here
Valuation
against the asking price
Risks
planning & flood
Sold prices
similar homes nearby
Trends
the local market
Energy performance
Newnhams Rough ranks among the most efficient homes in the postcode for energy use.
EPC Expired
This certificate is over 10 years old and is no longer valid.Expired 06 Jun 2026
EPC Rating
Property Improvements
Changes detected from historical EPC data
Heat pump installed, significantly improving energy efficiency
Changed to a more efficient fuel source
Heating controls upgraded for better temperature management
Single glazing replaced with double or better glazing
Cavity wall insulation installed
Roof insulation improved
Floor insulation added or improved
Planning history
- Apr 2021RenovationFullIn report
Proposed alterations to existing access.
- Documents
- 17 docs on file
- Reference
- DM/21/0665
- Dec 2020RenovationFullIn report
Proposed alterations to existing access.
- Documents
- 17 docs on file
- Reference
- DM/20/4205
We flagged 1 thing worth checking at Newnhams Rough
Independent checks surfaced things a buyer would want to understand before offering. The report explains each one in full, with the underlying data and what to ask.
- Larger development activity nearby
30-day money-back guarantee
Sales history & valuation
Latest sale on Newnhams Rough was the lowest on Land Registry record across the postcode.
£3,378,000
Modelled from EPC, postcode comparables and a sale-price growth of -49.0% per year over 8 years.
£15,000
Growth on file: -49.0% per year over 8 years.
Sales timeline
15 October 2020Most recent
£15,000
-99.4%over 7 years3 April 2013
£2,400,000
Median price across the last 5 sales in RH17 7BT: £475,000 (2021–2019).
Nearby sales in RH17 7BT
Jasmine Cottage, Birch Grove, Horsted Keynes, Haywards Heath, RH17 7BT
Sold Jun 2021
£460,000Stonecote, Birch Grove, Horsted Keynes, Haywards Heath, RH17 7BT
Sold May 2021
£575,000Elm Cottage, Birch Grove, Horsted Keynes, Haywards Heath, RH17 7BT
Sold Jul 2020
£987,0002 Hamewith Cottages, Birch Grove, Horsted Keynes, Haywards Heath, RH17 7BT
Sold Nov 2019
£410,000Joy Cottage, Birch Grove, Horsted Keynes, Haywards Heath, RH17 7BT
Sold Oct 2019
£475,000
Everything we know about Newnhams Rough, in one report
What it's really worth, what could be wrong, and the planning, sales and area data in full.
What we flagged
- Larger development activity nearby

Versus other Birch Grove homes
On price per m², Newnhams Rough runs well behind the street norm.
Price per m²
£19
Street avg £5,444
Floor Area
805 m²
Street avg 166 m²
CO₂ Emissions
9.7 t/year
Street avg 11.6 t/year
Years Held
6 years
Street avg 9 years
Similar properties nearby
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RH17 7EJ
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1 Corner Cottages, Tanyard Lane, Chelwood Gate
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1 Cheffins Walk
RH17 7EP
1 Ashgrove Cottages, The Green, Horsted Keynes
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1 Blacksmiths Cottages, Station Road, Horsted Keynes
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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
2/mo
Steady year-on-year across the wider district.
Nearest stop
1.4 km
The Red Lion — bus stop.
Closest school
2.1 km
Danehill Church of England Primary School. 2 schools nearby.
Go deeper on the local area
The full report breaks down crime, transport links, schools and air quality in depth.
Road noise across the postcode

Daytime· 07:00 – 23:00
43.6dB

Night-time· 23:00 – 07:00
36.2dB