9a is a four-bedroom detached house in Arrington, Royston, Royston (SG8 0BA). It has a recorded floor area of 164 m² (around 1765 sq ft), construction records dating it to 1983-1990 and council tax band F. The latest certificate (June 2024) shows a D (score 57), a step below the typical UK home. The rating has held steady at D across 2 certificates since August 2009. Between certificates, lighting went from Very Poor to Very Good; while roof efficiency dropped from Good to Average and window efficiency dropped from Good to Average. The recommended improvements would push it to C (score 71). Main heating runs on oil. Records show the property has been extended at some point in its history. The home occupies a cul-de-sac position.
Sale prices here have outpaced England HPI: 6% per year against 0% for the wider region. Today's modelled estimate of £640,000 is 24.3% above the 2017 sale price. On a £-per-square-foot basis, the last sale (£292/sq ft) was about 186.6% above the typical sold price in the postcode. At 164 m² the property is well over the postcode median (59 m² across 17 EPCs), placing it in the larger end of the local stock. Last sold in November 2017, so it's been off the market for around 9 years. Across the public record there are 4 sales, relatively high churn for a single property. 5 planning records sit against the property, 5 approved, 0 refused. Past consents include an extension and a porch, meaningful when judging how the property has evolved.
9a's carbon output runs well above what efficient homes in the postcode produce.
9a has been through 5 approved planning applications — a well-evolved property.
Infill extension and alterations to the roofline to incorporate a new room along with addition of 1 no. dormer
Latest sale on 9a was the highest on Land Registry record across the postcode.
£640,000
Modelled from EPC, postcode comparables and a sale-price growth of 6.0% per year over 18 years.
£515,000
Growth on file: 6.0% per year over 18 years.
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Floor Area for 9a runs comfortably ahead of the street norm.
EPC Rating
57 (D)
Street avg 69 (D)
Floor Area
164 m²
Street avg 66 m²
CO₂ Emissions
7.2 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
48.3dB

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Changes detected from historical EPC data
More low energy lighting installed
Ventilation system changed
Infill extension and alterations to the roofline to incorporate a new room along with addition of 1 no. dormer
Full planning data for 9a, Clifden Close, Arrington, Royston, SG8 0BA
3 more on this property, plus every nearby application and full decision details, in the report.
9 November 2017Most recent
£515,000
+40.1%over 7 years20 January 2010
£367,500
+28.9%over 4 years15 September 2005
£285,000
+58.3%over 5 years28 September 1999
£180,000
Median price across the last 5 sales in SG8 0BA: £280,000 (2024–2000).
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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Street avg 3.2 t/year
Habitable Rooms
7 rooms
Street avg 3 rooms
SG8 0BA
Night-time· 23:00 – 07:00
40.3dB