Model valuation£417,0008 Busby Close
Local market context
21 Castle Street, Southampton, SO14 6GZ
Solar panels
Estimated value
£309,000
- Since the 2017 sale (£210,000)+47%
- Against SO14 6GZ's recent median (£232,000)+33%
Newest record on this page: May 2025. Land Registry and EPC registers update monthly, so this page can trail them by 2–3 months.
Property type
Mid terrace
Bedrooms
4
Bathrooms
2
Floor area
90 m²
969 sq ft
Energy rating
C
Score 71
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
£309,000
- Against its 2017 sale (£210,000)+47%
- Against SO14 6GZ's recent median (£232,000)+33%
Your note and figure are shown publicly on this page.
How the estimate is made
The estimate for 21 Castle Street is modelled from its 90 m² EPC floor area, its 2 recorded sales and recent sales of comparable homes in SO14 6GZ. 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
90 m² from the EPC lodged in June 2024
Sales of this home
2 sales recorded, the latest in 2017
Recent sales in SO14 6GZ
5 sales, median £232,000 (2025–2021)
This page or the full report?
| Data | This page | Full report |
|---|---|---|
| Sales | Latest sale shown: May 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.
Sale price has at least doubled since 2001.
Sales timeline
17 January 2017Most recent
£210,000
+147.1%over 15 years25 September 2001
£85,000
Median price across the last 5 sales in SO14 6GZ: £232,000 (2025–2021).
Nearby sales in SO14 6GZ
What this page doesn't show
1 potential issue has already been flagged for 21 Castle Street, Southampton, SO14 6GZ. The detail, evidence and what to ask about it are in the Risks Report.
- Signs of HMO activity in the areaIn report
- Flood risk from rivers, sea and surface waterIn report
- Subsidence and ground-stability signalsIn report
- Refusals, enforcement and big schemes nearbyIn report
One time fee only - money back guarantee
About 21 Castle Street
A plain-English summary derived from public records, EPC certificates, sold prices and local data.
21 Castle Street is a four-bedroom mid-terrace house in Southampton (SO14 6GZ). It has a recorded floor area of 90 m² (around 969 sq ft), construction records dating it to 1900-1929 and council tax band C. The property has solar panels on record, all of which lower running costs and tend to lift resale appeal. The latest certificate (June 2024) shows a C (score 71). The rating has held steady at C across 2 certificates since November 2013. Between certificates, lighting went from Average to Very Good; while roof efficiency dropped from Average to Poor. The recommended improvements would push it to B (score 84).
At 90 m² it's 20.8% larger than the typical home in the postcode (75 m² median across 8 EPCs). Last changed hands 10 years ago, in January 2017. Across 2001–2017, sale prices on this property compounded at 6.1% per year. Today's modelled estimate of £309,000 is 47.1% above the 2017 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
- Bedrooms4
- Bathrooms2
Building
- Solar panelsYes
Before you decide
Everything you need to know about 21 Castle Street
The true value, the hidden risks and the full sale history, in one report.
Signs of HMO activity in the area
Pick your report · from £14.99
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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)
Jun 2024
EPC Rating
A
B
C
C71
D
E
F
G
Main Heating
Gas
Main Fuel
Gas
Hot Water
Good
Windows
Average
CO2 Emissions
2.7 t/year
Occupancy
Owner Occupied
Certificate validity
Valid until 24 June 2034
Property Improvements
Changes detected from historical EPC data
Jun 2024from Nov 2013
Heating Controls
Prog + TRVsFull
Heating controls upgraded for better temperature management
Low Energy Lighting
33%100%
More low energy lighting installed
Planning history
Applications and permits filed against 21 Castle Street, Southampton, SO14 6GZ, sourced from the PlanIt planning register.
21 Castle Street has no planning applications on record.
38
But the area is active
38 notable applications nearby — larger schemes and conversions that could reshape the street. The report maps them all.
Versus other Castle Street homes
Four headline reads against 8 similar houses on this street, drawn from the latest EPC and Land Registry data.
On price per m², 21 Castle Street runs well behind the street norm.
Price per m²
£2,333
Street avg £3,185
Floor Area
90 m²
Street avg 74 m²
Habitable Rooms
5 rooms
Street avg 4 rooms
CO₂ Emissions
2.7 t/year
Street avg 2.9 t/year
The neighbourhood at a glance
A condensed read of the local area. Each tile links through to the full breakdown on the Southampton district page.
Crime
413/mo
Steady year-on-year across the wider district.
Nearest stop
0.2 km
Denzil Avenue — bus stop.
Closest school
0.3 km
Bevois Town Primary School. 38 schools nearby.
Nearest schools
- Bevois Town Primary SchoolPrimary329m
- Mount Pleasant JuniorsPrimary342m
- Mount Pleasant InfantsPrimary477m
- St Anne's Catholic SchoolSecondary518m
Nearest stops
- Denzil AvenueBus stop235m
- Archers RoadBus stop269m
- Aldi StoreBus stop294m
- Law CourtsBus stop337m
Most reported crime locally
- Violence & Sexual Offences3,151 reports40%
- Anti-social Behaviour817 reports10%
- Shoplifting754 reports10%
- Public Order588 reports7%
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 SO14 6GZ from Defra's strategic mapping. The pin marks this postcode's centroid.
Daytime· 07:00 – 23:00
54.7dB
Night-time· 23:00 – 07:00
44.5dB
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 3 Building Survey
Victorian-eraMid-Terrace HouseEPC CPre-1919 build
Because the property was built before 1919, we believe a Level 3 building survey should be considered.
From £955 · Includes VAT
Similar properties nearby
A handful of close matches in the same postcode area, ranked by likeness on bedrooms, type and floor area.
£335k
10 Castle Street
SO14 6HA
4 bed1 bath
£286k
1 Gordon Avenue
SO14 6WJ
3 bed1 bath
£282k
1 Castle Street
SO14 6GZ
3 bed2 bath
£268k
1 St Annes Mews, Alma Road
SO14 6UX
3 bed1 bath
£263k
10 Clausentum Road
SO14 6RZ
3 bed1 bath
£247k
10 Ancasta Road
SO14 6SA
3 bed1 bath
£242k
1 Rockstone Lane
SO14 6HZ
3 bed
£472k
10 Alma Road
SO14 6UP
5 bed2 bath
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Start your researchHow to read this page
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 21 Castle Street is modelled from its 90 m² EPC floor area, its 2 recorded sales and recent sales of comparable homes in SO14 6GZ. 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 21 Castle Street. 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 21 Castle Street was lodged in June 2024 at band C and is valid until June 2034. 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 21 Castle Street. 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 19 months, which places each incident at an approximate point. The 38 schools and 30 stops listed are measured in a straight line from SO14 6GZ, not by walking route. Road noise is Defra's strategic noise modelling, averaged across the postcode.
- Council tax band
- 21 Castle Street 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 21 Castle Street, Southampton, SO14 6GZ. Each answer is also embedded as structured data for search engines.
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Keep exploring
- Every home in SO14 6GZSold prices, values and energy ratings for the postcode
- SO 14 property marketPrices, postcodes, schools and transport across the district
- 21 Castle Street, Southampton 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