5a is a three-bedroom semi-detached house in Guilden Morden, Royston, Royston (SG8 0JN). It has a recorded floor area of 102 m² (around 1098 sq ft), construction records dating it to 1996-2002 and council tax band D. The latest certificate (February 2024) shows a C (score 76), near the top of the C band. The rating has held steady at C across 3 certificates since October 2008. Between certificates, window efficiency went from Average to Good, lighting went from Poor to Very Good and main heating went from Average to Good. The recommended improvements would push it to B (score 87). Main heating runs on electricity. Period features are noted in the property record. The home occupies a cul-de-sac position.
Sale prices here have outpaced England HPI: 6.2% per year against 0% for the wider region. Today's modelled estimate of £391,000 is 12.7% above the 2018 sale price. On a £-per-square-foot basis, the last sale (£316/sq ft) was about 38.9% above the typical sold price in the postcode. Most recent transfer: November 2018 at £347,000. Across the public record there are 5 sales, relatively high churn for a single property. 3 planning records sit against the property, 3 approved, 0 refused. Past consents include an extension, meaningful when judging how the property has evolved. At 102 m² it's 25.9% larger than the typical home in the postcode (81 m² median across 24 EPCs).
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Already flagged here
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Extension: Part single, part two storey
Demolition of existing detached garage and the erection of a two storey side extension with integral domestic garage and part single storey and part two storey rear extension. Replacement of front bay window.
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5a has more than tripled in price since its earliest registered sale in 1998.
£391,000
Modelled from EPC, postcode comparables and a sale-price growth of 6.2% per year over 20 years.
£347,000
Growth on file: 6.2% per year over 20 years.
What it's really worth, what could be wrong, and the planning, sales and area data in full.
What we flagged
EPC Rating for 5a runs comfortably ahead of the street norm.
Price per m²
£3,402
Street avg £3,813
Floor Area
102 m²
Street avg 112 m²
Habitable Rooms
4 rooms
Street avg 5 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.
Closest school
0.6 km

Daytime· 07:00 – 23:00
43.9dB

Valuation
against the asking price
Risks
planning & flood
Sold prices
similar homes nearby
Trends
the local market
Changes detected from historical EPC data
Hot water efficiency decreased
More low energy lighting installed
Heat pump installed, significantly improving energy efficiency
Changed to a more efficient fuel source
Heating controls upgraded for better temperature management
Hot water efficiency improved
Window efficiency improved
Floor insulation added or improved
Extension: Two storey
Demolition of existing detached garage and the erection of a two storey side extension with integral domestic garage and a one and half storey rear extension.
14 November 2018Most recent
£347,000
+44.6%over 6 years17 August 2012
£240,000
-4.0%over 2 years20 January 2010
£249,999
+18.5%over 6 years28 May 2003
£211,000
+104.9%over 4 years24 July 1998
£103,000
Median price across the last 5 sales in SG8 0JN: £420,000 (2025–2021).

CO₂ Emissions
2.3 t/year
Street avg 4.2 t/year
SG8 0LP
Guilden Morden CofE Primary Academy. 2 schools nearby.
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Night-time· 23:00 – 07:00
35.9dB