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The Cassini Building, 33 Mercator Close, Southampton, SO16 4HW

EPC B

Estimated value

£186,000

  • Since the 2017 sale (£182,500)+2%
  • Against SO16 4HW's recent median (£203,000)-8%

Newest record on this page: October 2025. Land Registry and EPC registers update monthly, so this page can trail them by 2–3 months.

Learn about this valuation
Property type
Detached
Floor top floor
Bedrooms
2
Floor area
60 m²
646 sq ft
Energy rating
B
Score 91
Tenure
Freehold
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Valuation

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

£186,000

  • Against its 2017 sale (£182,500)+2%
  • Against SO16 4HW's recent median (£203,000)-8%

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 1 recorded sale 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

    1 sale recorded, the latest in 2017

  • Recent sales in SO16 4HW

    5 sales, median £203,000 (2025–2023)

This page or the full report?

DataThis pageFull report
SalesLatest sale shown: October 2025Latest available records, read when you order
ValuationEstimate from the last refreshAnalysed against comparable sales
PlanningNone on this homeFull history, plus nearby schemes
Flood riskNot shownIncluded
Price

Sales history & valuation

Every recorded sale of this home, how its price has moved, and what neighbouring properties have sold for.

Sales timeline

  1. 15 May 2017Most recent

    £182,500

Median price across the last 5 sales in SO16 4HW: £203,000 (2025–2023).

Risks

What this page doesn't show

1 potential issue has already been flagged for The Cassini Building, 33 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

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Overview

About The Cassini Building

A plain-English summary derived from public records, EPC certificates, sold prices and local data.

The Cassini Building is a two-bedroom detached house in Southampton (SO16 4HW). It has a recorded floor area of 60 m² (around 646 sq ft). Tenure is freehold. 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).

On the market in May 2017 and unlisted since — roughly 9 years.

Specifications

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

  • Bedrooms2
  • Open-plan layoutYes

Outside

  • ParkingAllocated

Building

  • TenureFreehold
  • ConciergeYes
  • RefurbishedYes
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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Preview of the full property report

The data behind every report

  • HM Land Registry, source of sold price history
  • Department for Education, source of schools data
  • Police.uk, source of crime statistics
  • Department for Transport, source of stations and transport links
  • Environment Agency, source of flood risk data
  • Department for Environment, Food & Rural Affairs, source of road noise data
  • PlanIt, source of planning application records
Energy

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 2017

EPC 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

5 months remaining
Planning

Planning history

Applications and permits filed against The Cassini Building, 33 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.

On the street

Versus other Mercator Close homes

Four headline reads against 21 similar flats on this street, drawn from the latest EPC and Land Registry data.

Floor Area for The Cassini Building runs comfortably ahead of the street norm.

Price per m²

£3,042

Street avg £3,076

On par

Floor Area

60 m²

Street avg 55 m²

Above

CO₂ Emissions

0.3 t/year

Street avg 0.2 t/year

Below

Years Held

9 years

Street avg 7 years

On par
Area

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.
Full Southampton report

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.

Noise

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 road noise heatmap for SO16 4HW

Daytime· 07:00 – 23:00

52.9dB

Low
Night-time road noise heatmap for SO16 4HW

Night-time· 23:00 – 07:00

43.4dB

Low
55 dB
60 dB
65 dB
70 dB
75 dB
80 dB
Defra Road Noise Strategic Mapping, Round 4
SDL Surveying

Get a survey for this property

Level 2 HomeBuyer Report

Top Floor FlatFreeholdEPC B

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.

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Comparables

Similar properties nearby

A handful of close matches in the same postcode area, ranked by likeness on bedrooms, type and floor area.
£249k

1 Newman Street

SO16 4FL

2 bed2 bath
£253k

1 Cheviot Crescent

SO16 4AE

2 bed1 bath
£271k

1 Chiltern Green

SO16 4AZ

2 bed1 bath
£242k

1 Cotswold Road

SO16 4AX

3 bed
£249k

1 Clarendon Road

SO16 4GB

3 bed1 bath
£265k

1 Mendip Road

SO16 4BL

3 bed1 bath
£286k

1 Cecil Avenue

SO16 4GP

3 bed
£118k

1 Hameldon Close

SO16 4QL

1 bed1 bath

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Method

How to read this page

Where every figure above comes from, how current it is and what it can't tell you.
Valuation method in detail
How the estimate is made
The estimate for The Cassini Building is modelled from its 60 m² EPC floor area, its 1 recorded sale 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. 1 sale is 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.
FAQ

Common questions

The questions buyers, sellers and homeowners most often ask about The Cassini Building, 33 Mercator Close, Southampton, SO16 4HW. Each answer is also embedded as structured data for search engines.

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