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Get started25 Back Street is a semi-detached house in Biggleswade (SG18 8JA). It has a recorded floor area of 58 m² (around 624 sq ft), construction records dating it to 1900-1929 and council tax band C. The latest certificate (April 2025) shows a D (score 63), on the cusp of jumping into the C band. When first surveyed in June 2014 the rating was E, the property has climbed 1 band since. Between certificates, roof efficiency went from Very Poor to Good. The recommended improvements would lift it to B (score 88), a 2-band jump.
Sale prices here have outpaced England HPI: 5% per year against 0% for the wider region. Today's modelled estimate of £272,000 sits 97.1% above the 2015 sale of £138,000. On a £-per-square-foot basis, the last sale (£221/sq ft) was about 21.5% above the typical sold price in the postcode. At 58 m² the property is well over the postcode median (43 m² across 33 EPCs), placing it in the larger end of the local stock. Last sold in March 2015, so it's been off the market for around 11 years. Across the public record there are 4 sales, relatively high churn for a single property.
Recommended upgrades on file would lift this property by multiple EPC bands.
25 Back Street has more than doubled in price since the earliest registered sale in 2000.
£272,000
Modelled from EPC, postcode comparables and a sale-price growth of 5.0% per year over 14 years.
£138,000
Growth on file: 5.0% per year over 14 years.
Price per m²
£2,379
Street avg £2,197
Floor Area
58 m²
Street avg 58 m²
Habitable Rooms
3 rooms
Street avg 3 rooms
Rail-style transport is unusually close for this postcode.
Crime
3/mo
Steady year-on-year across the wider district.
Nearest stop
0.1 km
The Dells — bus stop.

Daytime· 07:00 – 23:00
52.0dB

Changes detected from historical EPC data
Heating controls upgraded for better temperature management
Roof insulation improved
More low energy lighting installed
Are we missing something? Tell us about home improvements to help adjust your valuation.
5 March 2015Most recent
£138,000
3 July 2007
£137,500
+5.8%over 7 months8 December 2006
£130,000
+88.4%over 6 years7 November 2000
£69,000
Median price across the last 5 sales in SG18 8JA: £172,000 (2025–2021).
CO₂ Emissions
2.7 t/year
Street avg 2.9 t/year
Closest school
0.4 km
Lawnside Academy. 6 schools nearby.
Night-time· 23:00 – 07:00
41.9dB
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