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21 Bye Road, Swanwick, Southampton, SO31 7GX

4 sales on record2 planning records

Estimated value

£470,000

  • Since the 2012 sale (£260,000)+81%
  • Against SO31 7GX's recent median (£475,000)-1%

Newest record on this page: July 2026. Land Registry and EPC registers update monthly, so this page can trail them by 2–3 months.

Learn about this valuation
Property type
Detached
Bedrooms
3
Floor area
125 m²
1345 sq ft
Energy rating
D
Score 62
Council tax
Band D
Tenure
Owner Occupied
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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

£470,000

  • Against its 2012 sale (£260,000)+81%
  • Against SO31 7GX's recent median (£475,000)-1%

Your note and figure are shown publicly on this page.

How the estimate is made

The estimate for 21 Bye Road is modelled from its 125 m² EPC floor area, its 4 recorded sales and recent sales of comparable homes in SO31 7GX. 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

    125 m² from the EPC lodged in July 2026

  • Sales of this home

    4 sales recorded, the latest in 2012

  • Recent sales in SO31 7GX

    5 sales, median £475,000 (2024–2019)

This page or the full report?

DataThis pageFull report
SalesLatest sale shown: April 2024Latest available records, read when you order
ValuationEstimate from the last refreshAnalysed against comparable sales
Planning1 of 2 applicationsFull 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.

21 Bye Road valuation sits well clear of the typical sold price in this postcode.

Sales timeline

  1. 15 February 2012Most recent

    £260,000

    +4.0%over 3 years

  2. 24 April 2008

    £249,950

  3. 29 October 2003

    £249,950

    +28.2%over 1 year

  4. 11 February 2002

    £195,000

Median price across the last 5 sales in SO31 7GX: £475,000 (2024–2019).

Risks

What this page doesn't show

1 potential issue has already been flagged for 21 Bye Road, Swanwick, Southampton, SO31 7GX. The detail, evidence and what to ask about it are in the Risks Report.
  • Larger development activity nearbyIn 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

Overview

About 21 Bye Road

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

21 Bye Road is a three-bedroom detached house in Swanwick, Southampton, Southampton (SO31 7GX). It has a recorded floor area of 125 m² (around 1345 sq ft), construction records dating it to 1930-1949 and council tax band D. The latest certificate (July 2026) shows a D (score 62), on the cusp of jumping into the C band. The rating has held steady at D across 2 certificates since June 2011. Between certificates, lighting went from Very Poor to Very Good; while window efficiency dropped from Average to Poor. The recommended improvements would push it to C (score 74). This certificate was lodged in the last six months, so the rating reflects current condition.

Across 2002–2012, sale prices on this property compounded at 2.9% per year. Today's modelled estimate of £470,000 sits 80.8% above the 2012 sale of £260,000. On a £-per-square-foot basis, the last sale (£193/sq ft) was about 20.3% below the postcode norm. On the market in February 2012 and unlisted since — roughly 14 years. Across the public record there are 4 sales, relatively high churn for a single property. 2 planning records sit against the property, 0 approved, 0 refused.

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

  • Bedrooms3
  • Dining roomYes

Outside

  • GarageYes
Before you decide

Everything you need to know about 21 Bye Road

The true value, the hidden risks and the full sale history, in one report.

Larger development activity nearby

Pick your report · from £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
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 EPC has just been inspected, so the rating reflects current condition.

Current Certificate(1 of 2)
Jul 2026

EPC Rating

A
B
C
D
D62
E
F
G
Main Heating
Gas
Main Fuel
Gas
Hot Water
Good
Windows
Poor
CO2 Emissions
3.9 t/year
Occupancy
Owner Occupied

Certificate validity

Valid until 9 July 2036

9 years remaining

Property Improvements

Changes detected from historical EPC data

Jul 2026from Jun 2011
Low Energy Lighting
0%100%

More low energy lighting installed

Planning

Planning history

Applications and permits filed against 21 Bye Road, Swanwick, Southampton, SO31 7GX, sourced from the PlanIt planning register.

2 applications on record at 21 Bye Road, Swanwick, Southampton, SO31 7GX

2decisions2extensions10documents3nearby
  1. Apr 2002
    PorchFull
    Outcome in report

    Erection Of Front And Rear Dormer Windows, Porch And Rear Conservatory

    ExtensionConservatory
    Documents
    10 docs on file
    Reference
    P/02/0379/FP
    Full record in report
  2. More recent applications — locked
  3. ConservatoryDecision

Unlock 21 Bye Road, Swanwick, Southampton, SO31 7GX's full planning history

You're seeing the shape of it. The report has the substance.

  • Every decision — granted, refused or withdrawn (2 on record)
  • All 2 applications on this property in full, plus 3 notable nearby
  • The 10 documents, officer reports & conditions
  • What the pattern means for extending or converting here
£14.99one-off · instant

One time fee only - money back guarantee

On the street

Versus other Bye Road homes

Four headline reads against 9 similar houses on this street, drawn from the latest EPC and Land Registry data.

On habitable rooms, 21 Bye Road stands well clear of the street.

Price per m²

£2,080

Street avg £3,305

Strongly below

Floor Area

125 m²

Street avg 124 m²

On par

Habitable Rooms

7 rooms

Street avg 5 rooms

Strongly above

CO₂ Emissions

3.9 t/year

Street avg 3.3 t/year

Below
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

Rail-style transport is unusually close for this postcode.

Crime

233/mo

Steady year-on-year across the wider district.

Nearest stop

0.4 km

Swanwick Shore Road — bus stop.

Closest school

1.2 km

Sarisbury Church of England Junior School. 9 schools nearby.

Nearest schools

  • Sarisbury Church of England Junior SchoolPrimary1.2km
  • Bursledon Church of England Infant SchoolPrimary1.6km
  • Bursledon Junior School(CA)Primary1.7km
  • Sarisbury Infant SchoolPrimary1.8km

Nearest stops

  • Swanwick Shore RoadBus stop377m
  • Swanwick LaneBus stop403m
  • Swanwick LaneBus stop570m
  • Sarisbury GreenBus stop765m

Most reported crime locally

  • Violence & Sexual Offences1,244 reports45%
  • Anti-social Behaviour390 reports14%
  • Public Order201 reports7%
  • Criminal Damage & Arson188 reports7%

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 SO31 7GX from Defra's strategic mapping. The pin marks this postcode's centroid.
Daytime road noise heatmap for SO31 7GX

Daytime· 07:00 – 23:00

56.0dB

Moderate
Night-time road noise heatmap for SO31 7GX

Night-time· 23:00 – 07:00

49.9dB

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 3 Building Survey

Early 20th centuryDetached BungalowEPC DExtended multiple times (2+ extensions)

Because the property has been extended more than once, we believe a Level 3 building survey should be considered.

From £1,020 · Includes VAT

Comparables

Similar properties nearby

A handful of close matches in the same postcode area, ranked by likeness on bedrooms, type and floor area.
£421k

1 Brookfield Gardens, Sarisbury Green

SO31 7DT

3 bed1 bath
£397k

1 Bye Road, Swanwick

SO31 7GX

3 bed1 bath
£397k

1 Dormy Close, Sarisbury Green

SO31 7DD

3 bed
£609k

1 Badgers Run, Holly Hill Lane, Sarisbury Green

SO31 7AB

3 bed
£330k

1 Cecil Gardens, Sarisbury Green

SO31 7NQ

3 bed
£328k

1 Ambledale, Sarisbury Green

SO31 7BR

3 bed1 bath
£551k

1 Agincourt Drive, Sarisbury Green

SO31 7PH

4 bed1 bath
£562k

1 Delft Close, Locks Heath

SO31 7TQ

4 bed

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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 21 Bye Road is modelled from its 125 m² EPC floor area, its 4 recorded sales and recent sales of comparable homes in SO31 7GX. 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. 4 sales are recorded for 21 Bye Road. 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 Bye Road was lodged in July 2026 at band D and is valid until July 2036. 2 certificates are on record, which shows how the home has changed.
Planning records
Planning applications are collected from local authority registers through PlanIt. 2 applications are matched to 21 Bye Road. 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 12 months, which places each incident at an approximate point. The 9 schools and 30 stops listed are measured in a straight line from SO31 7GX, not by walking route. Road noise is Defra's strategic noise modelling, averaged across the postcode.
Council tax band
21 Bye Road is in council tax band D. 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.
FAQ

Common questions

The questions buyers, sellers and homeowners most often ask about 21 Bye Road, Swanwick, Southampton, SO31 7GX. Each answer is also embedded as structured data for search engines.

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