Great Thorndean Farm, The Old Dairy, Slough Green Lane, Warninglid, Haywards Heath, RH17 5SL
About Great Thorndean Farm
Great Thorndean Farm is a detached house in Warninglid, Haywards Heath, Haywards Heath (RH17 5SL). It has a recorded floor area of 275 m² (around 2960 sq ft) and construction records dating it to 2023. The latest certificate (September 2023) shows a D (score 62), on the cusp of jumping into the C band. The recommended improvements would push it to C (score 76). Main heating runs on oil: heating oil.
At 275 m² the property is well over the postcode median (105 m² across 9 EPCs), placing it in the larger end of the local stock. Its energy rating outperforms most of the postcode (better than 78% of similar EPCs). Today's modelled estimate of £1,328,000 sits 195.1% above the 2016 sale of £450,000. On a £-per-square-foot basis, the last sale (£152/sq ft) was about 52.6% below the postcode norm. Last changed hands 10 years ago, in November 2016. 8 planning records sit against the property, 0 approved, 0 refused.
Know exactly what you're buying at Great Thorndean Farm
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
Great Thorndean Farm's carbon output runs well above what efficient homes in the postcode produce.
EPC Rating
Planning history
- May 2025ConditionsIn report
Vary condition 1 (Approved Plans) and removal of condition 11 (bin store) of planning permission DM/23/0971 to allow for proposed changes to car part (to be predominantly wood clad and storage to run the length of car port).
- Documents
- 20 docs on file
- Reference
- DM/25/0596
- Sept 2023ConditionsIn report
Variation of Condition 2 (drainage) and Conditions 5 and 6 (landscaping) of planning application DM/22/2018 (relating to planning application DM/17/1837). Please note amended address and description.
- Documents
- 24 docs on file
- Reference
- DM/23/0971
We flagged 1 thing worth checking at Great Thorndean Farm
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
Great Thorndean Farm valuation sits well clear of the typical sold price in this postcode.
£1,328,000
Modelled from EPC, postcode comparables.
£450,000
Recorded with HM Land Registry.
Sales timeline
10 November 2016Most recent
£450,000
Median price across the last 5 sales in RH17 5SL: £725,000 (2023–2016).
Nearby sales in RH17 5SL
Great Thorndean Barn, Slough Green Lane, Warninglid, Haywards Heath, RH17 5SL
Sold Jul 2023
£1,345,000Barnsnape Lodge, Slough Green Lane, Warninglid, Haywards Heath, RH17 5SL
Sold Oct 2019
£805,000Great Thorndean Farm Gables, Slough Green Lane, Warninglid, Haywards Heath, RH17 5SL
Sold Oct 2016
£666,0003 Paternosters Cottages, Slough Green Lane, Warninglid, Haywards Heath, RH17 5SL
Sold Oct 2016
£780,000Great Thorndean Farm House, Slough Green Lane, Warninglid, Haywards Heath, RH17 5SL
Sold Sept 2016
£848,015
Everything we know about Great Thorndean Farm, 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 Slough Green Lane homes
Great Thorndean Farm is notably below the street on price per m².
Price per m²
£1,636
Street avg £5,722
Floor Area
275 m²
Street avg 246 m²
CO₂ Emissions
9.8 t/year
Street avg 12.1 t/year
Years Held
10 years
Street avg 9 years
Similar properties nearby
1 Bevan Bank, Cuckfield
RH17 5GR
1 Barrowfield, Cuckfield
RH17 5ER
1 Brock End, Cuckfield
RH17 5BU
1 Buttinghill Drive, Cuckfield
RH17 5GQ
1 Betts Folly, Warninglid Lane, Warninglid
RH17 5TQ
1 Bylanes Crescent, Cuckfield
RH17 5HA
1 Bishopstone Farm Cottages, Bishopstone Lane, Ansty
RH17 5AR
1 Champions Place
RH17 5LE
The neighbourhood at a glance
Crime
2/mo
Steady year-on-year across the wider district.
Nearest stop
0.6 km
Staplefield Lane — bus stop.
Closest school
2.3 km
St. Mark's CofE Primary School. 1 school 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
50.0dB

Night-time· 23:00 – 07:00
42.9dB