WONHAM MILL HOUSE WONHAM LANE, RH3 7AD is a Semi-Detached in Betchworth, Surrey, England. It last sold for £1,000,000 in 2015. Its current EPC rating is E (score 42 out of 100), with potential to reach C. Floor area is approximately 259 m². This works out at about £3,861 per m², 29% below the town average of £5,404 per m² (context, not a valuation). Local authority: Mole Valley.
WONHAM MILL HOUSE WONHAM LANE
BETCHWORTH, SURREY · RH3 7AD
Things you should know
A quick summary of this property, drawn from its records.
It's a semi-detached property, with 259 m² of floor area.
Last sold for £1,000,000 in April 2015 — its only sale on record. · HM Land Registry
That sale works out at ~£3,861/m² — 29% below the town average of £5,404/m² (612 sales). · Context, not a valuation
Energy rating EPC E (score 42/100), with potential to reach C. · EPC, inspected 2025
Built Before 1900. · Construction age band, from EPC
Facts from HM Land Registry (sales) and the EPC register (energy), under the Open Government Licence. Area comparisons are context, not a valuation or financial advice. Figures are as per our current dataset, which we're expanding continually.
Property Overview
Key facts from EPC & HM Land Registry records.
Built Form
Semi-Detached
Floor Area
259 m²
≈ 2,788 sq ft
Year Built
Before 1900
Construction age band, from EPC
Current EPC Rating
Band E · Score 42/100
Potential Band C · Valid until 12 May 2035
Local Authority
Mole Valley↗
Value Insights
Price metrics derived from sale price and floor area.
Price per square metre
£3,861 /m²
Based on the 2015 sale
£/m² vs BETCHWORTH
−29% below the average sale price
Area avg £5,404/m² · 612 sales
Floor area
259 m²
≈ 2,788 sq ft · from EPC
Last sale price
£1,000,000
30 April 2015
How This Compares
How this property's 2015 sale price of £1,000,000 compares with the average sale price nearby — based on recorded house prices (not £/m²).
vs RH3 postcode area
RH3 average sale price: £654,220 · based on 915 sales
vs BETCHWORTH average
BETCHWORTH average sale price: £654,881 · based on 916 sales
Averages are across all property types sold 2020–2026 in our dataset, so they reflect the mix of homes in the area rather than like-for-like.
Sales History
1 sale recorded
Last sold
£1,000,000
30 April 2015
30 April 2015
Latest£1,000,000
Detached · Freehold
Only one sale is recorded for this property, so change and annualised return can't be calculated yet. They'll appear automatically if it sells again.
EPC Intelligence
Energy Performance Certificate history for this property.
Energy Efficiency Over Time
Year-on-year EPC score progression for this property.
EPC energy efficiency scores for WONHAM MILL HOUSE WONHAM LANE. The property scored 78 (Rating C) in 2012 and 42 (Rating E) in 2025, a change of 36 points.
Point change
2012 to 2025
Summary: EPC energy efficiency scores for WONHAM MILL HOUSE WONHAM LANE. The property scored 78 (Rating C) in 2012 and 42 (Rating E) in 2025, a change of 36 points.
Rating E · Score 42
LatestInspected 12 May 2025
Valid until 12 May 2035
Potential
Floor Area
259 m²
Construction Era
Before 1900
CO₂ Emissions
13 t/yr
Mains Gas
No
Walls
Solid brick, as built, no insulation (assumed)
Very PoorRoof
Roof room(s), insulated
GoodWindows
Some double glazing
PoorMain Heating
Ground source heat pump, underfloor, electric
PoorRating F · Score 38
Inspected 24 February 2015
Expired 24 February 2025
Potential
Floor Area
211 m²
Construction Era
Before 1900
CO₂ Emissions
12 t/yr
Mains Gas
No
Walls
Solid brick, as built, no insulation (assumed)
Very PoorRoof
Pitched, no insulation (assumed)
Very PoorWindows
Single glazed
Very PoorMain Heating
Water source heat pump, underfloor, electric
AverageRating C · Score 80
Inspected 8 September 2012
Expired 8 September 2022
Potential
Floor Area
116 m²
Construction Era
2012
CO₂ Emissions
2.3 t/yr
Mains Gas
—
Walls
Average thermal transmittance 0.18 W/m²K
Very GoodRoof
Average thermal transmittance 0.17 W/m²K
GoodWindows
Fully double glazed
GoodMain Heating
Water source heat pump, underfloor, electric
GoodRating C · Score 80
Inspected 8 September 2012
Expired 8 September 2022
Potential
Floor Area
120 m²
Construction Era
2012
CO₂ Emissions
2.4 t/yr
Mains Gas
—
Walls
Average thermal transmittance 0.18 W/m²K
Very GoodRoof
Average thermal transmittance 0.17 W/m²K
GoodWindows
Fully double glazed
GoodMain Heating
Water source heat pump, underfloor, electric
GoodRating C · Score 78
Inspected 8 September 2012
Expired 8 September 2022
Potential
Floor Area
110 m²
Construction Era
2012
CO₂ Emissions
2.5 t/yr
Mains Gas
—
Walls
Average thermal transmittance 0.18 W/m²K
Very GoodRoof
Average thermal transmittance 0.17 W/m²K
GoodWindows
Fully double glazed
GoodMain Heating
Water source heat pump, underfloor, electric
GoodiHow is the EPC score calculated?
The score (1–100) is the property's energy efficiency rating, produced by an accredited Domestic Energy Assessor using the UK Government's Standard Assessment Procedure (SAP). A higher score means a more energy-efficient home that's cheaper to run.
It's calculated from the property's physical characteristics, including:
- Size & floor area
- Construction & age
- Wall, roof & floor insulation
- Windows / glazing
- Main heating & controls
- Hot water & lighting
These are the factors shown in the certificates above. The score maps to a band — A (92–100, most efficient) down to G(1–20). The "potential" score is what could be achieved with the recommended improvements. Source: MHCLG EPC Register.
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