Model valuation£417,0008 Busby Close
Local market context
Railway House, Flat 9, Knowsley Road, Cosham, Portsmouth, PO6 2AB
Property type
Detached
Floor 01
Habitable rooms
4
From EPC
Floor area
108 m²
1163 sq ft
Energy rating
D
Score 68
Council tax
Band C
Tenure
Social Rental
About Railway House
A plain-English summary derived from public records, EPC certificates, sold prices and local data.
Railway House is a detached house in Cosham, Portsmouth, Portsmouth (PO6 2AB). It has a recorded floor area of 108 m² (around 1163 sq ft), construction records dating it to 1996-2002 and council tax band C. At 108 m² this is the largest unit on EPC record across Railway House (52–108 m²). The building's EPC ratings span D to B, with this unit at the bottom. On EPC score it ranks last in the building (68 versus a best of 85). The latest certificate (November 2025) shows a D (score 68), on the cusp of jumping into the C band. Earlier certificates rated it B (March 2015); the latest reading is 2 bands lower. Between certificates, wall efficiency dropped from Very Good to Good and roof efficiency dropped from Good to Average.
At 108 m² the property is well over the postcode median (66 m² across 22 EPCs), placing it in the larger end of the local stock. On energy efficiency it sits in the bottom 10% of properties in this postcode — significant headroom for improvement.
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The data behind every report
Energy performance
Every EPC certificate filed against this property — current rating, recorded improvements, and where there's headroom to reach a higher band.
Railway House sits at the bottom of the postcode for energy efficiency — meaningful headroom to improve.
Current Certificate(1 of 2)
Nov 2025
EPC Rating
A
B
C
D
D68
E
F
G
Main Heating
Gas
Main Fuel
Gas
Hot Water
Good
Windows
Average
CO2 Emissions
2.7 t/year
Occupancy
Rented
Certificate validity
Valid until 2 November 2035
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Level 2 HomeBuyer Report
Late 20th century1st Floor FlatEPC D
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Planning history
Applications and permits filed against Railway House, Flat 9, Knowsley Road, Cosham, Portsmouth, PO6 2AB, sourced from the PlanIt planning register.
Railway House has no planning applications on record.
8
But the area is active
8 notable applications nearby — larger schemes and conversions that could reshape the street. The report maps them all.
Sales history & valuation
Recorded transactions, our model's current estimate, and a quick read on what neighbouring properties have sold for.
Railway House has no Land Registry sales on file, suggesting it has stayed in the same hands since registration began.
Current estimate
See how we calculated this£222,000
Modelled from EPC, postcode comparables.
No sales recorded with HM Land Registry
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.
Versus other Knowsley Road homes
Four headline reads against 21 similar flats on this street, drawn from the latest EPC and Land Registry data.
EPC Rating for Railway House lags the street by a wide margin.
EPC Rating
68 (D)
Street avg 81 (C)
Floor Area
108 m²
Street avg 63 m²
CO₂ Emissions
2.7 t/year
Street avg 1.1 t/year
Habitable Rooms
4 rooms
Street avg 2 rooms
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Start your researchSimilar properties nearby
A handful of close matches in the same postcode area, ranked by likeness on bedrooms, type and floor area.
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5 Highbury Buildings, Flat 2, Portsmouth Road, Cosham
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Admirals Place, Flat 4, 50 Havant Road, Cosham
PO6 2QA
Flat2 bed1 bath
£182k
Admirals Place, Flat 2, 50 Havant Road, Cosham
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Admirals Place, Flat 7, 50 Havant Road, Cosham
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The neighbourhood at a glance
A condensed read of the local area. Each tile links through to the full breakdown on the Portsmouth district page.
Rail-style transport is unusually close for this postcode.
Crime
260/mo
Steady year-on-year across the wider district.
Nearest stop
0.0 km
High Street — bus stop.
Closest school
0.6 km
Court Lane Infant Academy. 25 schools nearby.
Go deeper on the local area
A Local Area report breaks down crime, transport links, schools and air quality in depth.
Road noise across the postcode
Modelled day and night-time noise levels around PO6 2AB from Defra's strategic mapping. The pin marks this postcode's centroid.
Daytime· 07:00 – 23:00
56.1dB
Night-time· 23:00 – 07:00
46.6dB
55 dB
60 dB
65 dB
70 dB
75 dB
80 dB
Defra Road Noise Strategic Mapping, Round 4Common questions
The questions buyers, sellers and homeowners most often ask about Railway House, Flat 9, Knowsley Road, Cosham, Portsmouth, PO6 2AB. Each answer is also embedded as structured data for search engines.