23 Marlborough Avenue is a three-bedroom detached house in Byram, Knottingley, Knottingley (WF11 9NP). It has a recorded floor area of 68 m² (around 732 sq ft), construction records dating it to 1967-1975 and council tax band C. The latest certificate (August 2012) shows a D (score 63), on the cusp of jumping into the C band. When first surveyed in October 2008 the rating was E, the property has climbed 1 band since. Between certificates, hot-water efficiency went from Poor to Good, lighting went from Poor to Average and main heating went from Average to Good. The recommended improvements would lift it to B (score 85), a 2-band jump. The latest certificate is from August 2012, so improvements made since then won't be reflected.
Sale prices here have outpaced England HPI: 12.7% per year against 0% for the wider region. Today's modelled estimate of £223,000 sits 53.8% above the 2012 sale of £145,000. Last sold in December 2012, so it's been off the market for around 13 years.
Recommended upgrades on file would lift this property by multiple EPC bands.
This certificate is over 10 years old and is no longer valid.Expired 01 Aug 2022
No planning applications are recorded against 23 Marlborough Avenue, Byram, Knottingley, WF11 9NP. The full report also covers planning activity across the surrounding area.
Full planning data for 23 Marlborough Avenue, Byram, Knottingley, WF11 9NP
Every application and decision on this property and nearby, in full, in the report.
23 Marlborough Avenue valuation sits well clear of the typical sold price in this postcode.
£223,000
Modelled from EPC, postcode comparables and a sale-price growth of 12.7% per year over 2 years.
£145,000
Growth on file: 12.7% per year over 2 years.
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Detailed analysis
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On years held, 23 Marlborough Avenue stands well clear of the street.
Price per m²
£2,132
Street avg £2,447
Floor Area
68 m²
Street avg 67 m²
Habitable Rooms
4 rooms
Crime
5/mo
Steady year-on-year across the wider district.
Nearest stop
0.1 km
Sutton Lane — bus stop.

Daytime· 07:00 – 23:00
50.2dB

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Changes detected from historical EPC data
Heating controls upgraded for better temperature management
Hot water system upgraded
20 December 2012Most recent
£145,000
+34.9%over 2 years23 June 2010
£107,500
Median price across the last 5 sales in WF11 9NP: £190,000 (2025–2018).
Detailed EPC data
Full energy ratings, history and recommendations
Full planning history
Every application and decision on record
Comparable sales data
Plus transport, crime, schools and air quality
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Street avg 5 rooms
CO₂ Emissions
3.1 t/year
Street avg 3.0 t/year
WF11 9EU
Closest school
0.6 km
Brotherton and Byram Community Primary Academy. 8 schools nearby.
Night-time· 23:00 – 07:00
41.8dB