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Get started51a is a four-bedroom detached house in Marlborough (SN8 1HQ). It has a recorded floor area of 292 m² (around 3143 sq ft), construction records dating it to before 1900 and council tax band D. The latest certificate (December 2020) shows a C (score 70). When first surveyed in August 2015 the rating was E, the property has climbed 2 bands since. Between certificates, wall efficiency went from Very Poor to Good, window efficiency went from Very Poor to Average and lighting went from Good to Very Good. Records show the property has been extended at some point in its history.
Sale prices here have outpaced England HPI: 25.6% per year against 0% for the wider region. Today's modelled estimate of £1,740,000 is 10.8% below the 2021 sale of £1,950,000, a rare downward gap that often correlates with deferred maintenance or unfinished works. On a £-per-square-foot basis, the last sale (£620/sq ft) was about 112.1% above the typical sold price in the postcode. At 292 m² the property is well over the postcode median (108 m² across 21 EPCs), placing it in the larger end of the local stock. 10 planning records sit against the property, 9 approved, 0 refused. Past consents include an extension, a basement excavation and tree works, meaningful when judging how the property has evolved. Most recent transfer: June 2021 at £1,950,000. That sale was during the post-pandemic price surge, when transactions cleared materially above pre-2020 trend.
51a's carbon output runs well above what efficient homes in the postcode produce.
51a has been through 9 approved planning applications — a well-evolved property.
Garden study and WC
Latest sale on 51a was the highest on Land Registry record across the postcode.
£1,740,000
Modelled from EPC, postcode comparables and a sale-price growth of 25.6% per year over 5 years.
£1,950,000
Growth on file: 25.6% per year over 5 years.
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Detailed AI analysis
Price per m² for 51a runs comfortably ahead of the street norm.
Price per m²
£6,678
Street avg £3,954
Floor Area
292 m²
Street avg 124 m²
Habitable Rooms
7 rooms
Daytime road noise here sits well below conversation level — a quiet pocket of the postcode.
Crime
2/mo
Steady year-on-year across the wider district.
Nearest stop
0.2 km

Daytime· 07:00 – 23:00
48.7dB

Changes detected from historical EPC data
Heating controls upgraded for better temperature management
Single glazing replaced with double or better glazing
Wall insulation improved
Loft insulation installed or upgraded to 250mm+
Floor insulation added or improved
More low energy lighting installed
Are we missing something? Tell us about home improvements to help adjust your valuation.
Garden study and WC
8 more applications for this property
Join to see all planning history.
25 June 2021Most recent
£1,950,000
+179.2%over 4 years23 December 2016
£698,500
Median price across the last 5 sales in SN8 1HQ: £510,000 (2025–2019).
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Detailed EPC data
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Full planning history
Every application and decision on record
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Street avg 5 rooms
CO₂ Emissions
9.9 t/year
Street avg 4.7 t/year
SN8 1UW
Ladbrokes — bus stop.
Closest school
0.3 km
Marlborough St Mary's CE Primary School. 3 schools nearby.
Night-time· 23:00 – 07:00
41.0dB