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The Cassini Building, 31 Mercator Close, Southampton, SO16 4HW

EPC A
Property type
Detached
Floor mid floor
Floor area
60 m²
646 sq ft
Energy rating
A
Score 92
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 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 an A (score 92), the top energy band on the EPC scale. 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 top.

Its energy rating outperforms most of the postcode (better than 84% of similar EPCs). Today's modelled estimate of £200,000 is 12.4% above the 2024 sale price. Last sale on file: £178,000 in October 2024.

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.

EPC Rating

A
A92
B
C
D
E
F
G
Main Heating
Gas
Main Fuel
Gas
Hot Water
Good
Windows
Very Good
CO2 Emissions
0.2 t/year
Occupancy
—
SDL Surveying

Get a survey for this property

Level 2 HomeBuyer Report

Mid Floor FlatEPC A

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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Planning

Planning history

Applications and permits filed against The Cassini Building, 31 Mercator Close, Southampton, SO16 4HW, sourced from the PlanIt planning register.

The Cassini Building 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.

Price

Sales history & valuation

Recorded transactions, our model's current estimate, and a quick read on what neighbouring properties have sold for.
Current estimate

£200,000

Modelled from EPC, postcode comparables.

See how we calculated this
Last sold (2024)

£178,000

Recorded with HM Land Registry.

Sales timeline

  1. 20 October 2024Most recent

    £178,000

  2. 30 May 2017

    £177,500

Median price across the last 5 sales in SO16 4HW: £210,000 (2025–2023).

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.

The Cassini Building is notably below the street on years held.

Price per m²

£2,967

Street avg £3,080

Below

Floor Area

60 m²

Street avg 55 m²

Above

CO₂ Emissions

0.2 t/year

Street avg 0.2 t/year

On par

Years Held

2 years

Street avg 7 years

Strongly below
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

Pick your report · every report is £14.99

One time fee only - money back guarantee

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
Comparables

Similar properties nearby

A handful of close matches in the same postcode area, ranked by likeness on bedrooms, type and floor area.
£191k

1 Binsey Close

SO16 4AQ

£233k

1 Clarendon Road

SO16 4GB

3 bed1 bath
£238k

1 Cotswold Road

SO16 4AX

3 bed
£253k

1 Helvellyn Road

SO16 4AS

£255k

1 Alice Mews

SO16 4HY

£260k

1 Mendip Road

SO16 4BL

3 bed1 bath
£262k

1 Newman Street

SO16 4FL

2 bed2 bath
£264k

1 Barters Close

SO16 4HA

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

9/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.

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
FAQ

Common questions

The questions buyers, sellers and homeowners most often ask about The Cassini Building, 31 Mercator Close, Southampton, SO16 4HW. Each answer is also embedded as structured data for search engines.