Firstone House is a semi-detached house in Mayfield (TN20 6EJ). It has a recorded floor area of 58 m² (around 624 sq ft), construction records dating it to before 1900 and council tax band C. At 58 m² this is the 4th smallest of 8 units on EPC record in Firstone House, where floor areas span 54–125 m². The building's EPC ratings span E to B, with this unit at the bottom. On EPC score it ranks last in the building (54 versus a best of 81). The latest certificate (June 2022) shows an E (score 54), well below the UK norm with real room to improve. Earlier certificates rated it D (August 2012); the latest reading is one band lower. Between certificates, wall efficiency dropped from Good to Poor. The recommended improvements would push it to D (score 61).
Sale prices here have outpaced England HPI: 4.1% per year against 0% for the wider region. Today's modelled estimate of £207,000 is 16% above the 2020 sale price. On a £-per-square-foot basis, the last sale (£286/sq ft) was about 30.5% above the typical sold price in the postcode. At 58 m² it sits well below the postcode median (134 m² across 23 EPCs), making it one of the more compact homes locally. It lags the bulk of the postcode on energy efficiency (less efficient than 83% of similar EPCs). Most recent transfer: December 2020 at £178,500. Across the public record there are 4 sales, relatively high churn for a single property.
No planning applications are recorded against Firstone House, Flat 5, Stone Cross, Mayfield, TN20 6EJ. The full report also covers planning activity across the surrounding area.
Full planning data for Firstone House, Flat 5, Stone Cross, Mayfield, TN20 6EJ
Every application and decision on this property and nearby, in full, in the report.
Sale price has at least doubled since 2000.
£207,000
Modelled from EPC, postcode comparables and a sale-price growth of 4.1% per year over 20 years.
£178,500
Growth on file: 4.1% per year over 20 years.
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Firstone House is notably below the street on epc rating.
Price per m²
£3,078
Street avg £2,488
Floor Area
58 m²
Street avg 70 m²
Habitable Rooms
3 rooms
Street avg 3 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
0.1 km

Daytime· 07:00 – 23:00
49.9dB

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14 December 2020Most recent
£178,500
+28.4%over 7 years3 June 2013
£139,000
+6.9%over 9 years21 August 2003
£130,000
+63.5%over 2 years15 December 2000
£79,500
Median price across the last 5 sales in TN20 6EJ: £850,000 (2025–2023).
Detailed EPC data
Full energy ratings, history and recommendations
Full planning history
Every application and decision on record
Comparable sales data
Plus transport, crime, schools and air quality
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CO₂ Emissions
4.0 t/year
Street avg 2.3 t/year
TN20 6EJ
Aylwards House — bus stop.
Closest school
1.0 km
Mayfield Church of England Primary School. 2 schools nearby.
Night-time· 23:00 – 07:00
41.4dB