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18 King William Street, Swindon, SN1 3LB

3 sales on record1 planning record

Estimated value

£265,000

  • Since the 2022 sale (£265,000)0%
  • Against SN1 3LB's recent median (£217,000)+22%

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
Mid terrace
Bedrooms
3
Bathrooms
2
Floor area
92 m²
990 sq ft
Energy rating
D
Score 60
Council tax
Band C
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

£265,000

  • Against its 2022 sale (£265,000)0%
  • Against SN1 3LB's recent median (£217,000)+22%

Your note and figure are shown publicly on this page.

How the estimate is made

The estimate for 18 King William Street is modelled from its 92 m² EPC floor area, its 3 recorded sales and recent sales of comparable homes in SN1 3LB. 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

    92 m² from the EPC lodged in August 2022

  • Sales of this home

    3 sales recorded, the latest in 2022

  • Recent sales in SN1 3LB

    5 sales, median £217,000 (2025–2021)

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
Planning1 applicationFull 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.

Sale price has at least doubled since 2007.

Sales timeline

  1. 14 November 2022Most recent

    £265,000

    +40.2%over 15 years

  2. 19 August 2007

    £189,000

    +71.8%over 7 months

  3. 26 January 2007

    £110,000

Median price across the last 5 sales in SN1 3LB: £217,000 (2025–2021).

Risks

What this page doesn't show

2 potential issues have already been flagged for 18 King William Street, Swindon, SN1 3LB. The detail, evidence and what to ask about it are in the Risks Report.
  • Signs of HMO activity in the areaIn 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

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Overview

About 18 King William Street

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

18 King William Street is a three-bedroom mid-terrace house in Swindon (SN1 3LB). It has a recorded floor area of 92 m² (around 990 sq ft), construction records dating it to 1900-1929 and council tax band C. The latest certificate (August 2022) shows a D (score 60), on the cusp of jumping into the C band. When first surveyed in June 2013 the rating was G, the property has climbed 3 bands since. Between certificates, hot-water efficiency went from Very Poor to Good and main heating went from Very Poor to Good; while roof efficiency dropped from Good to Very Poor and window efficiency dropped from Good to Average. The recommended improvements would lift it to B (score 82), a 2-band jump.

One planning record on file: tree works approved in 2023. Past consents include tree works, meaningful when judging how the property has evolved. The record references conservation-area consent, which constrain future alterations. Across 2007–2022, sale prices on this property compounded at 5.7% per year. On a £-per-square-foot basis, the last sale (£268/sq ft) was about 99.6% above the typical sold price in the postcode. Most recent transfer: November 2022 at £265,000. That sale was during the post-pandemic price surge, when transactions cleared materially above pre-2020 trend.

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
  • Bathrooms2
  • Dining roomYes
  • EnsuiteYes

Outside

  • ParkingAllocated
Before you decide

Everything you need to know about 18 King William Street

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

Signs of HMO activity in the areaLarger development activity nearby

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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.

Recommended upgrades on file would lift this property by multiple EPC bands.

Current Certificate(1 of 2)
Aug 2022

EPC Rating

A
B
C
D
D60
E
F
G
Main Heating
Gas
Main Fuel
Gas
Hot Water
Good
Windows
Average
CO2 Emissions
4.6 t/year
Occupancy
Owner Occupied

Certificate validity

Valid until 15 August 2032

5 years remaining

Property Improvements

Changes detected from historical EPC data

Aug 2022from Jun 2013
EPC improved fromG19toD60
Main Fuel
ElectricGas

Connected to mains gas supply

Hot Water
Very PoorGood

Hot water efficiency improved

Low Energy Lighting
77%100%

More low energy lighting installed

Planning

Planning history

Applications and permits filed against 18 King William Street, Swindon, SN1 3LB, sourced from the PlanIt planning register.

18 King William Street sits within a conservation area — exterior works face additional planning controls.

1 application on record at 18 King William Street, Swindon, SN1 3LB

1decisions3documents30nearby
Flagged:Conservation area
  1. Sept 2023
    Tree WorksTrees
    Outcome in report

    Works to tree within a Conservation Area.

    Conservation Area
    Documents
    3 docs on file
    Reference
    S/TWC/23/1060
    Full record in report

Unlock 18 King William Street, Swindon, SN1 3LB's full planning history

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

  • Every decision — granted, refused or withdrawn (1 on record)
  • All 1 application on this property in full, plus 30 notable nearby
  • The 3 documents, officer reports & conditions
  • What the pattern means for extending or converting here
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On the street

Versus other King William Street homes

Four headline reads against 19 similar houses on this street, drawn from the latest EPC and Land Registry data.

18 King William Street outperforms the street on price per m² by a wide margin.

Price per m²

£2,880

Street avg £1,935

Strongly above

Floor Area

92 m²

Street avg 89 m²

Above

Habitable Rooms

6 rooms

Street avg 5 rooms

Strongly above

CO₂ Emissions

4.6 t/year

Street avg 4.3 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 Swindon district page.
Full Swindon report

Crime

380/mo

Steady year-on-year across the wider district.

Nearest stop

0.1 km

Avenue Road — bus stop.

Closest school

0.0 km

King William Street Church of England Primary School. 28 schools nearby.

Nearest schools

  • King William Street Church of England Primary SchoolPrimary49m
  • Lethbridge Primary SchoolPrimary367m
  • Holy Rood Catholic Primary SchoolPrimary533m
  • The Commonweal SchoolSecondary744m

Nearest stops

  • Avenue RoadBus stop108m
  • Prospect PlaceBus stop174m
  • Cannon StreetBus stop292m
  • Evangelical ChurchBus stop361m

Most reported crime locally

  • Violence & Sexual Offences2,179 reports34%
  • Anti-social Behaviour1,332 reports21%
  • Shoplifting636 reports10%
  • Public Order534 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 SN1 3LB from Defra's strategic mapping. The pin marks this postcode's centroid.
Daytime road noise heatmap for SN1 3LB

Daytime· 07:00 – 23:00

52.0dB

Low
Night-time road noise heatmap for SN1 3LB

Night-time· 23:00 – 07:00

41.6dB

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

Victorian-eraMid-Terrace HouseEPC DPre-1919 buildSolid (non-cavity) walls

Because the property was built before 1919 and has solid (non-cavity) walls, we believe a Level 3 building survey should be considered.

From £885 · 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.
£266k

1 Dumbarton Terrace

SN1 3HP

3 bed1 bath
£262k

1 Durham Street

SN1 3HS

3 bed1 bath
£282k

1 Folkestone Road

SN1 3NH

3 bed1 bath
£299k

1 Hythe Mews, Hythe Road

SN1 3LU

3 bed2 bath
£222k

1 Eastcott Road

SN1 3LS

3 bed
£354k

1 Ashford Road

SN1 3NT

3 bed3 bath
£469k

1 Hilton Close

SN1 3HX

3 bed2 bath
£223k

1 King William Street

SN1 3LB

2 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 18 King William Street is modelled from its 92 m² EPC floor area, its 3 recorded sales and recent sales of comparable homes in SN1 3LB. 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. 3 sales are recorded for 18 King William 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 18 King William Street was lodged in August 2022 at band D and is valid until August 2032. 2 certificates are on record, which shows how the home has changed.
Planning records
Planning applications are collected from local authority registers through PlanIt. 1 application is matched to 18 King William 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 17 months, which places each incident at an approximate point. The 28 schools and 30 stops listed are measured in a straight line from SN1 3LB, not by walking route. Road noise is Defra's strategic noise modelling, averaged across the postcode.
Council tax band
18 King William 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.
FAQ

Common questions

The questions buyers, sellers and homeowners most often ask about 18 King William Street, Swindon, SN1 3LB. Each answer is also embedded as structured data for search engines.

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