21 Mill Lane is a four-bedroom detached house in Arrington, Royston, Royston (SG8 0DB). It has a recorded floor area of 222 m² (around 2390 sq ft), construction records dating it to 1900-1929 and council tax band G. The latest certificate (November 2022) shows a D (score 57), a step below the typical UK home. The rating has held steady at D across 2 certificates since March 2014. Between certificates, window efficiency went from Average to Good and lighting went from Average to Very Good; while wall efficiency dropped from Poor to Very Poor and roof efficiency dropped from Good to Average. The recommended improvements would push it to C (score 77). Main heating runs on oil. Other recorded features include outbuildings and attached land beyond the plot.
Sale prices here have outpaced England HPI: 4.5% per year against 0% for the wider region. Today's modelled estimate of £1,012,000 is 27.8% above the 2024 sale price. At 222 m² it's 23.7% larger than the typical home in the postcode (180 m² median across 6 EPCs). Most recent transfer: March 2024 at £792,000.
21 Mill Lane's carbon output runs well above what efficient homes in the postcode produce.
No planning applications are recorded against 21 Mill Lane, Arrington, Royston, SG8 0DB. The full report also covers planning activity across the surrounding area.
Full planning data for 21 Mill Lane, Arrington, Royston, SG8 0DB
Every application and decision on this property and nearby, in full, in the report.
Sale price has grown by over 3x since 1997.
£1,012,000
Modelled from EPC, postcode comparables and a sale-price growth of 4.5% per year over 26 years.
£792,000
Growth on file: 4.5% per year over 26 years.
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On habitable rooms, 21 Mill Lane runs well behind the street norm.
EPC Rating
57 (D)
Street avg 59 (D)
Floor Area
222 m²
Street avg 201 m²
CO₂ Emissions
10.0 t/year
Street avg 8.6 t/year
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.

Daytime· 07:00 – 23:00
41.7dB

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Changes detected from historical EPC data
Window efficiency improved
More low energy lighting installed
26 March 2024Most recent
£792,000
+216.8%over 26 years19 December 1997
£250,000
Median price across the last 3 sales in SG8 0DB: £435,000 (2014–1998).
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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Habitable Rooms
5 rooms
Street avg 7 rooms
SG8 0PT
Night-time· 23:00 – 07:00
35.8dB