Model valuation£417,0008 Busby Close
Local market context
91a, High Street, Cosham, Portsmouth, PO6 3AZ
4 sales on record
Property type
Mid terrace
Floor 01
Habitable rooms
2
From EPC
Floor area
55 m²
592 sq ft
Energy rating
D
Score 66
Council tax
Band B
Tenure
Owner Occupied
About 91a
A plain-English summary derived from public records, EPC certificates, sold prices and local data.
91a is a mid-terrace house in Cosham, Portsmouth, Portsmouth (PO6 3AZ). It has a recorded floor area of 55 m² (around 592 sq ft), construction records dating it to 1930-1949 and council tax band B. The latest certificate (April 2021) shows a D (score 66), on the cusp of jumping into the C band. Earlier certificates rated it C (May 2009); the latest reading is one band lower. Between certificates, lighting went from Very Poor to Good; while roof efficiency dropped from Good to Average. The recommended improvements would push it to C (score 72). At 55 m² this is the 4th smallest of 14 units on EPC record in the building, where floor areas span 49–84 m². The building's EPC ratings span E to C across 14 units on file.
Across 1996–2022, sale prices on this property compounded at 4% per year. Today's modelled estimate of £137,000 is 14.2% above the 2022 sale price. Most recent transfer: April 2022 at £120,000. That sale was during the post-pandemic price surge, when transactions cleared materially above pre-2020 trend.
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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.
Current Certificate(1 of 2)
Apr 2021
EPC Rating
A
B
C
D
D66
E
F
G
Main Heating
Gas
Main Fuel
Gas
Hot Water
Good
Windows
Average
CO2 Emissions
2.4 t/year
Occupancy
Owner Occupied
Certificate validity
Valid until 18 April 2031
Property Improvements
Changes detected from historical EPC data
Apr 2021from May 2009
EPC improved fromC75toD66
Low Energy Lighting
0%67%
More low energy lighting installed
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Early 20th century1st Floor FlatEPC D
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Planning history
Applications and permits filed against 91a, High Street, Cosham, Portsmouth, PO6 3AZ, sourced from the PlanIt planning register.
91a has no planning applications on record.
13
But the area is active
13 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.
Sale price has at least doubled since 1996.
Current estimate
See how we calculated this£137,000
Modelled from EPC, postcode comparables and a sale-price growth of 4.0% per year over 26 years.
Last sold (2022)
£120,000
Growth on file: 4.0% per year over 26 years.
Sales timeline
21 April 2022Most recent
£120,000
+44.6%over 12 years24 March 2010
£83,000
+5.1%over 2 years14 June 2007
£79,000
+81.6%over 11 years7 March 1996
£43,500
Median price across the last 5 sales in PO6 3AZ: £217,000 (2025–2019).
Nearby sales in PO6 3AZ
75 High Street, Cosham, Portsmouth, PO6 3AZ
Sold Apr 2025
£85,00085a, High Street, Cosham, Portsmouth, PO6 3AZ
Sold Oct 2023
£115,000101b, High Street, Cosham, Portsmouth, PO6 3AZ
Sold Sept 2021
£225,00087 High Street, Cosham, Portsmouth, PO6 3AZ
Sold Sept 2019
£217,00087a, High Street, Cosham, Portsmouth, PO6 3AZ
Sold Sept 2019
£217,000
Versus other High Street homes
Four headline reads against 13 similar flats on this street, drawn from the latest EPC and Land Registry data.
91a is notably below the street on habitable rooms.
Price per m²
£2,182
Street avg £2,439
Floor Area
55 m²
Street avg 62 m²
Habitable Rooms
2 rooms
Street avg 3 rooms
CO₂ Emissions
2.4 t/year
Street avg 3.3 t/year
Property research, connected
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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.
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
0.5 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 3AZ from Defra's strategic mapping. The pin marks this postcode's centroid.
Daytime· 07:00 – 23:00
55.5dB
Night-time· 23:00 – 07:00
46.1dB
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 91a, High Street, Cosham, Portsmouth, PO6 3AZ. Each answer is also embedded as structured data for search engines.