Model valuation£417,0008 Busby Close
Local market context
The Cassini Building, 34 Mercator Close, Southampton, SO16 4HW
EPC B
Estimated value
£175,000
- Since the 2021 sale (£157,500)+11%
- Against SO16 4HW's recent median (£203,000)-14%
Newest record on this page: October 2025. Land Registry and EPC registers update monthly, so this page can trail them by 2–3 months.
Property type
Detached
Floor top floor
Floor area
60 m²
646 sq ft
Energy rating
B
Score 91
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
£175,000
- Against its 2021 sale (£157,500)+11%
- Against SO16 4HW's recent median (£203,000)-14%
Your note and figure are shown publicly on this page.
How the estimate is made
The estimate for The Cassini Building is modelled from its 60 m² EPC floor area, its 2 recorded sales and recent sales of comparable homes in SO16 4HW. 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
60 m² from the EPC lodged in April 2017
Sales of this home
2 sales recorded, the latest in 2021
Recent sales in SO16 4HW
5 sales, median £203,000 (2025–2023)
This page or the full report?
| Data | This page | Full report |
|---|---|---|
| Sales | Latest sale shown: October 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.
The latest sale landed in the post-pandemic price surge — useful context when reading the figure.
Sales timeline
20 April 2021Most recent
£157,500
-15.5%over 3 years11 May 2017
£186,500
Median price across the last 5 sales in SO16 4HW: £203,000 (2025–2023).
Nearby sales in SO16 4HW
23 Mercator Close, Southampton, SO16 4HW
Sold Oct 2025
£360,000The Cassini Building, 35 Mercator Close, Southampton, SO16 4HW
Sold Mar 2025
£203,000The Cassini Building, 31 Mercator Close, Southampton, SO16 4HW
Sold Oct 2024
£178,000The Lennox Building, 46 Mercator Close, Southampton, SO16 4HW
Sold Nov 2023
£148,000The Cassini Building, 28 Mercator Close, Southampton, SO16 4HW
Sold Aug 2023
£210,000
What this page doesn't show
1 potential issue has already been flagged for The Cassini Building, 34 Mercator Close, Southampton, SO16 4HW. 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 The Cassini Building
A plain-English summary derived from public records, EPC certificates, sold prices and local data.
The Cassini Building is a detached house in Southampton (SO16 4HW). It has a recorded floor area of 60 m² (around 646 sq ft). The latest certificate (April 2017) returns a high B (score 91), putting the home a stone's throw from an A rating. At 60 m² this is the 5th smallest of 12 units on EPC record in The Cassini Building, where floor areas span 57–61 m². The building's EPC ratings span B to A, with this unit at the bottom. On EPC score it ranks last in the building (91 versus a best of 92).
Across 2017–2021, sale prices on this property compounded at -4.2% per year. Today's modelled estimate of £175,000 is 11.1% above the 2021 sale price. On a £-per-square-foot basis, the last sale (£244/sq ft) was about 23.3% below the postcode norm. Sold April 2021 for £157,500. That sale was during the post-pandemic price surge, when transactions cleared materially above pre-2020 trend.
Before you decide
Everything you need to know about The Cassini Building
The true value, the hidden risks and the full sale history, in one report.
Signs of HMO activity in the area
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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.
The Cassini Building's carbon output is low for the local stock.
Current Certificate
Apr 2017EPC Rating
A
B
B91
C
D
E
F
G
Main Heating
Gas
Main Fuel
Gas
Hot Water
Good
Windows
Very Good
CO2 Emissions
0.3 t/year
Occupancy
—
Certificate validity
Valid until 27 April 2027
Planning history
Applications and permits filed against The Cassini Building, 34 Mercator Close, Southampton, SO16 4HW, sourced from the PlanIt planning register.
The Cassini Building 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.
Versus other Mercator Close homes
Four headline reads against 21 similar flats on this street, drawn from the latest EPC and Land Registry data.
Price per m² for The Cassini Building lags the street by a wide margin.
Price per m²
£2,625
Street avg £3,096
Floor Area
60 m²
Street avg 55 m²
CO₂ Emissions
0.3 t/year
Street avg 0.2 t/year
Years Held
5 years
Street avg 7 years
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
536/mo
Steady year-on-year across the wider district.
Nearest stop
0.1 km
Maybush Corner — bus stop.
Closest school
0.5 km
Oasis Academy Lord's Hill. 27 schools nearby.
Nearest schools
- Oasis Academy Lord's HillSecondary484m
- Newlands Primary SchoolPrimary631m
- Shirley Warren Primary & Nursery SchoolPrimary705m
- Mason Moor Primary School, Nursery & Sen UnitPrimary982m
Nearest stops
- Maybush CornerBus stop99m
- Maybush CornerBus stop130m
- Maybush RoadBus stop156m
- Crabwood RoadBus stop277m
Most reported crime locally
- Violence & Sexual Offences3,596 reports42%
- Anti-social Behaviour975 reports11%
- Criminal Damage & Arson710 reports8%
- Shoplifting650 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 SO16 4HW from Defra's strategic mapping. The pin marks this postcode's centroid.
Daytime· 07:00 – 23:00
52.9dB
Night-time· 23:00 – 07:00
43.4dB
55 dB
60 dB
65 dB
70 dB
75 dB
80 dB
Defra Road Noise Strategic Mapping, Round 4
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Similar 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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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 The Cassini Building is modelled from its 60 m² EPC floor area, its 2 recorded sales and recent sales of comparable homes in SO16 4HW. 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 The Cassini Building. 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 The Cassini Building was lodged in April 2017 at band B and is valid until April 2027. Floor area, heating and insulation details on this page come from it.
- Planning records
- Planning applications are collected from local authority registers through PlanIt. None is matched to The Cassini Building. 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 16 months, which places each incident at an approximate point. The 27 schools and 30 stops listed are measured in a straight line from SO16 4HW, not by walking route. Road noise is Defra's strategic noise modelling, averaged across the postcode.
Common questions
The questions buyers, sellers and homeowners most often ask about The Cassini Building, 34 Mercator Close, Southampton, SO16 4HW. Each answer is also embedded as structured data for search engines.
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Keep exploring
- Every home in SO16 4HWSold prices, values and energy ratings for the postcode
- SO 16 property marketPrices, postcodes, schools and transport across the district
- The Cassini Building, 34 Mercator Close, Southampton valuationHow the estimate is built and what moves it
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