Model valuation£417,0008 Busby Close
Local market context
20 Keswick Avenue, Portsmouth, PO3 5BA
Estimated value
£293,000
- Since the 2011 sale (£220,000)+33%
- Against PO3 5BA's recent median (£270,000)+9%
Newest record on this page: June 2025. Land Registry and EPC registers update monthly, so this page can trail them by 2–3 months.
Property type
Semi-detached
Bedrooms
3
Floor area
102 m²
1098 sq ft
Energy rating
D
Score 60
Council tax
Band C
Tenure
Owner Occupied
About this valuation
How the figure is worked out and what it's based on. If you know this home, you can tell other visitors what you think it's worth.
Our estimate
£293,000
- Against its 2011 sale (£220,000)+33%
- Against PO3 5BA's recent median (£270,000)+9%
Your note and figure are shown publicly on this page.
How the estimate is made
The estimate for 20 Keswick Avenue is modelled from its 102 m² EPC floor area, its 2 recorded sales and recent sales of comparable homes in PO3 5BA. It is an automated estimate, not a survey or mortgage valuation: condition, layout and improvements that aren't on record can move the real figure either way.
What it's based on
Floor area
102 m² from the EPC lodged in January 2011
Sales of this home
2 sales recorded, the latest in 2011
Recent sales in PO3 5BA
5 sales, median £270,000 (2025–2019)
This page or the full report?
| Data | This page | Full report |
|---|---|---|
| Sales | Latest sale shown: June 2025 | Latest available records, read when you order |
| Valuation | Estimate from the last refresh | Analysed against comparable sales |
| Planning | None on this home | Full history, plus nearby schemes |
| Flood risk | Not shown | Included |
Sales history & valuation
Every recorded sale of this home, how its price has moved, and what neighbouring properties have sold for.
20 Keswick Avenue changed hands twice within eighteen months — unusual for the area.
Sales timeline
18 February 2011Most recent
£220,000
+46.7%over 7 months11 July 2010
£150,000
Median price across the last 5 sales in PO3 5BA: £270,000 (2025–2019).
Nearby sales in PO3 5BA
What this page doesn't show
2 potential issues have already been flagged for 20 Keswick Avenue, Portsmouth, PO3 5BA. The detail, evidence and what to ask about it are in the Risks Report.
- Signs of HMO activity in the areaIn report
- Recent ownership pattern worth a lookIn report
- Flood risk from rivers, sea and surface waterIn report
- Subsidence and ground-stability signalsIn report
- Refusals, enforcement and big schemes nearbyIn report
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About 20 Keswick Avenue
A plain-English summary derived from public records, EPC certificates, sold prices and local data.
20 Keswick Avenue is a three-bedroom semi-detached house in Portsmouth (PO3 5BA). It has a recorded floor area of 102 m² (around 1098 sq ft), construction records dating it to 1930-1949 and council tax band C. The latest certificate (January 2011) shows a D (score 60), on the cusp of jumping into the C band. When first surveyed in March 2010 the rating was F, the property has climbed 2 bands since. Between certificates, roof efficiency went from Very Poor to Average, window efficiency went from Very Poor to Good and hot-water efficiency went from Poor to Very Good; while lighting dropped from Good to Average. The latest certificate is from January 2011, so improvements made since then won't be reflected.
It hasn't traded since February 2011, a hold of 15 years that's notably long for the area. Across 2010–2011, sale prices on this property compounded at 46.7% per year. Today's modelled estimate of £293,000 is 33.2% above the 2011 sale price.
What this property has
Pulled from EPC certificates, claim submissions and our property model. Empty categories are hidden — we only show what's known.
Inside
- Bedrooms3
Before you decide
Everything you need to know about 20 Keswick Avenue
The true value, the hidden risks and the full sale history, in one report.
Signs of HMO activity in the areaRecent ownership pattern worth a look
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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.
20 Keswick Avenue's EPC is over a decade old — improvements since won't be reflected.
EPC Expired
This certificate is over 10 years old and is no longer valid.Expired 05 Jan 2021
Current Certificate(1 of 2)
Jan 2011
EPC Rating
A
B
C
D
D60
E
F
G
Main Heating
Gas
Main Fuel
Gas
Hot Water
Very Good
Windows
Good
CO2 Emissions
4.4 t/year
Occupancy
Owner Occupied
Certificate validity
Expired on 5 January 2021
Property Improvements
Changes detected from historical EPC data
Jan 2011from Mar 2010
EPC improved fromF21toD60
Heating Controls
ThermostatFull
Heating controls upgraded for better temperature management
Hot Water
Immersion (Off-Peak)Main System
Hot water system upgraded
Windows
SingleFull Double
Single glazing replaced with double or better glazing
Roof Insulation
UninsulatedInsulated
Roof insulation improved
Low Energy Lighting
60%29%
Low energy lighting percentage decreased
Planning history
Applications and permits filed against 20 Keswick Avenue, Portsmouth, PO3 5BA, sourced from the PlanIt planning register.
20 Keswick Avenue has no planning applications on record.
9
But the area is active
9 notable applications nearby — larger schemes and conversions that could reshape the street. The report maps them all.
Versus other Keswick Avenue homes
Four headline reads against 20 similar houses on this street, drawn from the latest EPC and Land Registry data.
Years Held for 20 Keswick Avenue runs comfortably ahead of the street norm.
Price per m²
£2,157
Street avg £2,254
Floor Area
102 m²
Street avg 103 m²
Habitable Rooms
5 rooms
Street avg 5 rooms
CO₂ Emissions
4.4 t/year
Street avg 4.2 t/year
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.
Crime
141/mo
Falling year-on-year across the wider district.
Nearest stop
0.1 km
Chichester Road — bus stop.
Closest school
0.1 km
Copnor Primary School. 41 schools nearby.
Nearest schools
- Copnor Primary SchoolPrimary145m
- Penbridge Junior SchoolPrimary626m
- Westover Primary SchoolPrimary637m
- King's Academy College Park (Infant)Primary726m
Nearest stops
- Chichester RoadBus stop104m
- Copythorn RoadBus stop336m
- Kensington RoadBus stop336m
- Copnor BridgeBus stop490m
Most reported crime locally
- Violence & Sexual Offences1,033 reports41%
- Shoplifting332 reports13%
- Anti-social Behaviour234 reports9%
- Criminal Damage & Arson197 reports8%
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 PO3 5BA from Defra's strategic mapping. The pin marks this postcode's centroid.
Daytime· 07:00 – 23:00
51.2dB
Night-time· 23:00 – 07:00
40.5dB
55 dB
60 dB
65 dB
70 dB
75 dB
80 dB
Defra Road Noise Strategic Mapping, Round 4
Get a survey for this property
Level 2 HomeBuyer Report
Early 20th centurySemi-Detached HouseEPC D
We've checked 10 risk factors against the available data for this property and believe a Level 2 HomeBuyer Report could be a suitable option for you.
From £545 · Includes VAT
Similar properties nearby
A handful of close matches in the same postcode area, ranked by likeness on bedrooms, type and floor area.
£298k
1 Feltons Place
PO3 5LU
3 bed1 bath
£307k
1 Devon Road
PO3 5ET
3 bed1 bath
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1 Allcot Road
PO3 5DE
3 bed1 bath
£395k
1 Brampton Lane
PO3 5TB
3 bed2 bath
£272k
1 Adstone Lane
PO3 5TE
2 bed1 bath
£415k
1 Copnor Road
PO3 5AA
2 bed
£196k
1 Carronade Walk
PO3 5LX
2 bed1 bath
£173k
1 Bapaume Terrace, Peronne Road
PO3 5GD
2 bed1 bath
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Where every figure above comes from, how current it is and what it can't tell you.
- How the estimate is made
- The estimate for 20 Keswick Avenue is modelled from its 102 m² EPC floor area, its 2 recorded sales and recent sales of comparable homes in PO3 5BA. It is an automated estimate, not a survey or mortgage valuation: condition, layout and improvements that aren't on record can move the real figure either way.
- Where sold prices come from
- Sold prices are HM Land Registry Price Paid Data, which covers residential sales in England and Wales since 1995. 2 sales are recorded for 20 Keswick Avenue. Sales normally appear two to three months after completion, so the most recent ones take time to show up anywhere.
- Reading the EPC
- Energy Performance Certificates rate homes from A (most efficient) to G and last 10 years. The latest one for 20 Keswick Avenue was lodged in January 2011 at band D and expired in January 2021, so a new one is needed to sell or let. 2 certificates are on record, which shows how the home has changed.
- Planning records
- Planning applications are collected from local authority registers through PlanIt. None is matched to 20 Keswick Avenue. Councils sometimes file applications under a different address format, and applications on neighbouring land aren't listed here; the report covers both.
- Area figures
- Crime is police-recorded street-level data over the last 18 months, which places each incident at an approximate point. The 41 schools and 30 stops listed are measured in a straight line from PO3 5BA, not by walking route. Road noise is Defra's strategic noise modelling, averaged across the postcode.
- Council tax band
- 20 Keswick Avenue is in council tax band C. Bands are set by the Valuation Office Agency from historic values (1 April 1991 in England, 1 April 2003 in Wales), not today's price; the amount you pay depends on the council's rate for the band.
Common questions
The questions buyers, sellers and homeowners most often ask about 20 Keswick Avenue, Portsmouth, PO3 5BA. Each answer is also embedded as structured data for search engines.
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Keep exploring
- Every home in PO3 5BASold prices, values and energy ratings for the postcode
- PO 3 property marketPrices, postcodes, schools and transport across the district
- 20 Keswick Avenue, Portsmouth valuationHow the estimate is built and what moves it
- UK house price mapExplore prices by district, year by year
- Report on another addressLook up any home in England and Wales