27 Mill Lane is a five-bedroom detached house in Arrington, Royston, Royston (SG8 0DB). It has a recorded floor area of 346 m² (around 3724 sq ft), construction records dating it to 1976-1982 and council tax band G. The latest certificate (January 2024) shows a D (score 61), on the cusp of jumping into the C band. When first surveyed in November 2008 the rating was F, the property has climbed 2 bands since. Between certificates, wall efficiency went from Poor to Average, roof efficiency went from Poor to Good and window efficiency went from Average to Good. The recommended improvements would push it to C (score 77). Main heating runs on oil.
Held since March 2010 — that's 16 years off the open market, well above the local norm. At 346 m² the property is well over the postcode median (180 m² across 6 EPCs), placing it in the larger end of the local stock. Today's modelled estimate of £1,103,000 sits 153.6% above the 2010 sale of £435,000. On a £-per-square-foot basis, the last sale (£117/sq ft) was about 62% below the postcode norm. One planning record on file: an extension approved in 2011. Past consents include an extension, meaningful when judging how the property has evolved.
27 Mill Lane's carbon output runs well above what efficient homes in the postcode produce.
Extensions and alterations to the dwelling including extensions and roof alterations to the front of the property dormer windows to the rear roofslope erection of new detached garage to replace existing garage and new pitched roof over detached store.
27 Mill Lane valuation sits well clear of the typical sold price in this postcode.
£1,103,000
Modelled from EPC, postcode comparables.
£435,000
Recorded with HM Land Registry.
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Detailed analysis
A written breakdown of everything that matters
27 Mill Lane outperforms the street on floor area by a wide margin.
EPC Rating
61 (D)
Street avg 58 (D)
Floor Area
346 m²
Street avg 180 m²
CO₂ Emissions
11.0 t/year
Street avg 8.5 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
Heating system changed
Changed to a more efficient fuel source
Heating controls changed
Windows upgraded, improving insulation
Cavity wall insulation installed
Roof insulation improved
Replaced storage heaters with gas boiler
Fuel source changed
Heating controls upgraded for better temperature management
Hot water system upgraded
Window efficiency improved
Loft insulation upgraded to recommended levels
More low energy lighting installed
Hot water efficiency decreased
Full planning data for 27 Mill Lane, Arrington, Royston, SG8 0DB
Every application and decision on this property and nearby, in full, in the report.
22 March 2010Most recent
£435,000
Median price across the last 4 sales in SG8 0DB: £365,000 (2024–1997).
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
11 rooms
Street avg 6 rooms
SG8 0JX
Night-time· 23:00 – 07:00
35.8dB