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Get started13 Sun Street is a two-bedroom detached house in Biggleswade (SG18 0BP). It has a recorded floor area of 183 m² (around 1970 sq ft), construction records dating it to 1900-1929 and council tax band D. The latest certificate (January 2015) shows a D (score 67), on the cusp of jumping into the C band. When first surveyed in April 2009 the rating was G, the property has climbed 3 bands since. Between certificates, window efficiency went from Very Poor to Good, hot-water efficiency went from Very Poor to Good and lighting went from Very Poor to Very Good. The recommended improvements would lift it to B (score 81), a 2-band jump. The latest certificate is from January 2015, so improvements made since then won't be reflected.
Sale prices here have outpaced England HPI: 13.7% per year against 0% for the wider region. Today's modelled estimate of £472,000 sits 54.8% above the 2013 sale of £305,000. At 183 m² the property is well over the postcode median (72 m² across 16 EPCs), placing it in the larger end of the local stock. 2 planning records sit against the property, 2 approved, 0 refused. Past consents include an extension and a porch, meaningful when judging how the property has evolved. 12 years since the last transfer (December 2013).
13 Sun Street's carbon output runs well above what efficient homes in the postcode produce.
This certificate is over 10 years old and is no longer valid.Expired 13 Jan 2025
Re-use of existing building as a self contained dwellinghouse.
13 Sun Street valuation sits well clear of the typical sold price in this postcode.
£472,000
Modelled from EPC, postcode comparables and a sale-price growth of 13.7% per year over 5 years.
£305,000
Growth on file: 13.7% per year over 5 years.
On price per m², 13 Sun Street runs well behind the street norm.
Price per m²
£1,667
Street avg £3,729
Floor Area
183 m²
Street avg 93 m²
Habitable Rooms
6 rooms
Crime
3/mo
Steady year-on-year across the wider district.
Nearest stop
0.0 km
Sun Street — bus stop.

Daytime· 07:00 – 23:00
53.7dB

Changes detected from historical EPC data
Replaced storage heaters with gas boiler
Heating controls upgraded for better temperature management
Hot water system upgraded
Single glazing replaced with double or better glazing
Wall insulation improved
Loft insulation installed or upgraded to 250mm+
More low energy lighting installed
Connected to mains gas supply
Hot water efficiency improved
Windows upgraded, improving insulation
Are we missing something? Tell us about home improvements to help adjust your valuation.
Extension: Two storey · Side of property
Two storey side extension, single storey first floor front extension and addition of porch. Erection of double detached garage.
20 December 2013Most recent
£305,000
+79.4%over 4 years3 June 2009
£170,000
Median price across the last 5 sales in SG18 0BP: £320,000 (2025–2018).
Street avg 5 rooms
CO₂ Emissions
6.6 t/year
Street avg 5.6 t/year
SG18 0LL
Closest school
0.2 km
St Andrew's CofE VC Primary School. 6 schools nearby.
Night-time· 23:00 – 07:00
43.8dB
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