Firstone House is a semi-detached house in Mayfield (TN20 6EJ). It has a recorded floor area of 54 m² (around 581 sq ft), construction records dating it to 1996-2002 and council tax band C. At 54 m² this is the smallest unit on EPC record across Firstone House (54–125 m²). The building's EPC ratings span E to B across 8 units on file. The latest certificate (October 2021) shows a C (score 77), near the top of the C band. The rating has held steady at C across 2 certificates since February 2011. Between certificates, lighting went from Good to Very Good.
Sale prices here have outpaced England HPI: 5.4% per year against 0% for the wider region. On a £-per-square-foot basis, the last sale (£310/sq ft) was about 46.3% above the typical sold price in the postcode. At 54 m² it sits well below the postcode median (134 m² across 23 EPCs), making it one of the more compact homes locally. Most recent transfer: March 2020 at £180,000. Across the public record there are 7 sales, relatively high churn for a single property.
Firstone House's carbon output is low for the local stock.
No planning applications are recorded against Firstone House, Flat 3, Stone Cross, Mayfield, TN20 6EJ. The full report also covers planning activity across the surrounding area.
Full planning data for Firstone House, Flat 3, Stone Cross, Mayfield, TN20 6EJ
Every application and decision on this property and nearby, in full, in the report.
Sale price has grown by over 3x since 1997.
£194,000
Modelled from EPC, postcode comparables and a sale-price growth of 5.4% per year over 23 years.
£180,000
Growth on file: 5.4% per year over 23 years.
Everything we know about this property, compiled into one in-depth, downloadable report.
Detailed analysis
A written breakdown of everything that matters
Price per m² for Firstone House runs comfortably ahead of the street norm.
Price per m²
£3,333
Street avg £2,452
Floor Area
54 m²
Street avg 71 m²
Habitable Rooms
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

Launch offer
Secure checkout · One-off payment
30-day money-back guarantee

Changes detected from historical EPC data
Heating controls upgraded for better temperature management
More low energy lighting installed
25 March 2020Most recent
£180,000
+10.4%over 2 years7 December 2017
£163,000
+23.5%over 6 years21 April 2011
£132,000
-12.0%over 3 years3 July 2007
£149,950
+11.1%over 2 years14 April 2005
£135,000
+68.8%over 3 years1 May 2001
£80,000
+45.5%over 3 years1 August 1997
£55,000
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
Ad-free · Secure Stripe checkout · One-off payment
30-day money-back guarantee

Street avg 3 rooms
CO₂ Emissions
1.5 t/year
Street avg 2.7 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