10a is a semi-detached house in Byram, Knottingley, Knottingley (WF11 9DZ). It has a recorded floor area of 32 m² (around 344 sq ft), construction records dating it to 1950-1966 and council tax band A. At 32 m² this is the smallest unit on EPC record across the building (32–184 m²). The building's EPC ratings span F to B across 35 units on file. The latest certificate (July 2019) shows a C (score 71). When first surveyed in December 2008 the rating was E, the property has climbed 2 bands since. Between certificates, window efficiency went from Very Poor to Average, hot-water efficiency went from Very Poor to Very Good and lighting went from Average to Very Good; while wall efficiency dropped from Good to Average.
At 32 m² it sits well below the postcode median (76 m² across 34 EPCs), making it one of the more compact homes locally.
10a's carbon output is low for the local stock.
No planning applications are recorded against 10a, Byram Park Road, Byram, Knottingley, WF11 9DZ. The full report also covers planning activity across the surrounding area.
Full planning data for 10a, Byram Park Road, Byram, Knottingley, WF11 9DZ
Every application and decision on this property and nearby, in full, in the report.
10a has no Land Registry sales on file, suggesting it has stayed in the same hands since registration began.
£121,000
Modelled from EPC, postcode comparables.
That can mean the property has never traded since the registry began publishing in 1995, was a new build that hasn't been registered yet, or is held in the same hands long-term.
Everything we know about this property, compiled into one in-depth, downloadable report.
Detailed analysis
A written breakdown of everything that matters
Floor Area for 10a lags the street by a wide margin.
EPC Rating
71 (C)
Street avg 70 (C)
Floor Area
32 m²
Street avg 39 m²
CO₂ Emissions
1.5 t/year
Street avg 1.9 t/year
Crime
5/mo
Steady year-on-year across the wider district.
Nearest stop
0.0 km
West Acres — bus stop.

Daytime· 07:00 – 23:00
50.0dB

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Changes detected from historical EPC data
Replaced storage heaters with gas boiler
Connected to mains gas supply
Hot water system upgraded
Single glazing replaced with double or better glazing
More low energy lighting installed
Median price across the last 5 sales in WF11 9DZ: £152,000 (2024–2018).
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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Habitable Rooms
1 rooms
Street avg 2 rooms
Closest school
0.6 km
Brotherton and Byram Community Primary Academy. 9 schools nearby.
Night-time· 23:00 – 07:00
41.5dB