12 Cornish Close is a four-bedroom detached house in Royston (SG8 9FZ). It has a recorded floor area of 131 m² (around 1410 sq ft) and construction records dating it to 2021. The latest certificate (September 2023) returns a B (score 84), comfortably above the UK average. The recommended improvements would push it to A (score 93). Records show the property has been extended at some point in its history.
One planning record on file: an extension approved in 2024. Past consents include an extension, meaningful when judging how the property has evolved. At 131 m² it's 19.6% larger than the typical home in the postcode (110 m² median across 10 EPCs). Most recent transfer: October 2023 at £637,950.
Before you offer, see what the listing won't tell you, the true value, the red flags and the full history.
Launch offer · save £5
12 Cornish Close has an approved single-storey extension on the planning record.
£645,000
Modelled from EPC, postcode comparables.
£637,950
Recorded with HM Land Registry.
What it's really worth, what could be wrong, and the planning, sales and area data in full.
On price per m², 12 Cornish Close runs well behind the street norm.
Price per m²
£4,870
Street avg £5,079
Floor Area
131 m²
Street avg 118 m²
CO₂ Emissions
1.9 t/year
Crime
3/mo
Steady year-on-year across the wider district.
Nearest stop
0.1 km
Orpington Road — bus stop.

Daytime· 07:00 – 23:00
55.5dB

Valuation
against the asking price
Risks
planning & flood
Sold prices
similar homes nearby
Trends
the local market
What will this home really cost to run?
The EPC's recommended upgrades and their estimated cost, in the full report
Extension: Single storey
4m x 4m single storey extension.
What's in 12 Cornish Close, Royston, SG8 9FZ's planning history?
Refusals, disputes and full decisions on this property and nearby, in the report.
4 October 2023Most recent
£637,950
Median price across the last 5 sales in SG8 9FZ: £599,950 (2023–2023).

Street avg 1.7 t/year
Years Held
3 years
Street avg 3 years
SG8 9TH
Closest school
1.4 km
Tannery Drift School. 7 schools nearby.
Go deeper on the local area
The full report breaks down crime, transport links, schools and air quality in depth.
Night-time· 23:00 – 07:00
48.5dB