What type of property is 21 Blackstone Avenue, SN3 6DN?

21 Blackstone Avenue, SN3 6DN is a 4-bedroom semi-detached house.

What did 21 Blackstone Avenue, SN3 6DN sell for?

21 Blackstone Avenue, SN3 6DN last sold for £169,995 in September 2014, around 12 years ago. Before that, it sold for £146,500 in March 2007, so prices have been rising over 8 years on record. Source: HM Land Registry.

What is the price history for 21 Blackstone Avenue, SN3 6DN?

Across 2 sales between March 2007 and September 2014, 21 Blackstone Avenue, SN3 6DN rose from £146,500 to £169,995, a change of £23,495. That works out to roughly +2% per year compounded over 8 years. Source: HM Land Registry.

How energy efficient is 21 Blackstone Avenue, SN3 6DN?

The current EPC rating for 21 Blackstone Avenue, SN3 6DN is C with a score of 70 out of 100, lodged in June 2023. The assessor estimates the property could reach a B. Source: EPC Register.

What is the floor area of 21 Blackstone Avenue, SN3 6DN?

21 Blackstone Avenue, SN3 6DN has a recorded floor area of 97 m² (1,044 sq ft), around 24 m² per bedroom. That makes it about 17% larger than the median EPC-recorded property in SN3 6DN. Source: EPC Register.

How is 21 Blackstone Avenue, SN3 6DN heated?

The latest EPC at 21 Blackstone Avenue, SN3 6DN records mains gas as the main heating fuel. Source: EPC Register.

What council tax band is 21 Blackstone Avenue, SN3 6DN?

21 Blackstone Avenue, SN3 6DN is in council tax band C.

Where is 21 Blackstone Avenue, SN3 6DN located?

21 Blackstone Avenue, SN3 6DN sits in Swindon. It falls within the SN3 postcode district.

Is 21 Blackstone Avenue, SN3 6DN in a safe area?

Police records around 21 Blackstone Avenue, SN3 6DN show an average of 3 reported crimes per month over the last 10 months. Violent crime makes up roughly 60% of reports, the most common category. The overall trend is broadly stable. Source: Police UK.

Which schools serve 21 Blackstone Avenue, SN3 6DN?

The closest primary school to 21 Blackstone Avenue, SN3 6DN is Eldene Nursery and Primary School (236m), one of 21 primaries within walking distance. The closest secondary is The Dorcan Academy (975m), with 4 secondaries in the surrounding area.

What is the nearest station to 21 Blackstone Avenue, SN3 6DN?

The closest bus stop to 21 Blackstone Avenue, SN3 6DN is Thorne Road, 228m away. In total there are 30 bus stops within the surrounding area.

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21 Blackstone Avenue, Swindon, SN3 6DN

Property type

Semi-detached

Bedrooms

Floor area

97 m²

1044 sq ft

Energy rating

Score 70

Council tax

Band C

Tenure

Owner Occupied

Overview

About 21 Blackstone Avenue

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

21 Blackstone Avenue is a four-bedroom semi-detached house in Swindon (SN3 6DN). It has a recorded floor area of 97 m² (around 1044 sq ft), construction records dating it to 1967-1975 and council tax band C. The latest certificate (June 2023) shows a C (score 70). The rating has held steady at C across 3 certificates since March 2011. Between certificates, window efficiency went from Average to Good and lighting went from Very Poor to Very Good; while wall efficiency dropped from Good to Average and hot-water efficiency dropped from Very Good to Good. The recommended improvements would push it to B (score 82).

Across 2007–2014, sale prices on this property compounded at 2% per year. Today's modelled estimate of £286,000 sits 68.2% above the 2014 sale of £169,995. On a £-per-square-foot basis, the last sale (£163/sq ft) was about 16.2% below the postcode norm. At 97 m² it's 19% larger than the typical home in the postcode (82 m² median across 14 EPCs). Last sold in September 2014, so it's been off the market for around 12 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

Bedrooms4

Before you decide

Everything you need to know about 21 Blackstone Avenue

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

Larger development activity nearby

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The data behind every report

Energy

Energy performance

Every EPC certificate filed against this property — current rating, recorded improvements, and where there's headroom to reach a higher band.

Current Certificate(1 of 3)

Jun 2023

EPC Rating

C70

Main Heating

Gas

Main Fuel

Gas

Hot Water

Good

Windows

Good

CO2 Emissions

3.1 t/year

Occupancy

Owner Occupied

Property Improvements

Changes detected from historical EPC data

May 2021from Mar 2011

EPC improved fromC69toD58

Heating Controls

FullProg + Stat

Heating controls changed

Hot Water

Very GoodGood

Hot water efficiency decreased

Low Energy Lighting

0%100%

More low energy lighting installed

Jun 2023from May 2021

EPC improved fromD58toC70

Heating Controls

Prog + StatFull

Heating controls upgraded for better temperature management

Windows

AverageGood

Window efficiency improved

Wall Insulation

UninsulatedInsulated Cavity

Cavity wall insulation installed

Low Energy Lighting

100%79%

Low energy lighting percentage decreased

Get a survey for this property

Level 2 HomeBuyer Report

Late 20th centurySemi-Detached HouseEPC C

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Planning

Planning history

Applications and permits filed against 21 Blackstone Avenue, Swindon, SN3 6DN, sourced from the PlanIt planning register.

21 Blackstone Avenue has no planning applications on record.

But the area is active

3 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.

21 Blackstone Avenue valuation sits well clear of the typical sold price in this postcode.

Current estimate

£286,000

Modelled from EPC, postcode comparables and a sale-price growth of 2.0% per year over 8 years.

See how we calculated this

Last sold (2014)

£169,995

Growth on file: 2.0% per year over 8 years.

Sales timeline

25 September 2014Most recent
£169,995
+16.0%over 7 years
9 March 2007
£146,500

Median price across the last 5 sales in SN3 6DN: £245,000 (2024–2018).

Nearby sales in SN3 6DN

On the street

Versus other Blackstone Avenue homes

Four headline reads against 14 similar houses on this street, drawn from the latest EPC and Land Registry data.

Floor Area for 21 Blackstone Avenue runs comfortably ahead of the street norm.

Price per m²

£1,753

Street avg £2,650

Strongly below

Floor Area

97 m²

Street avg 87 m²

Strongly above

Habitable Rooms

6 rooms

Street avg 5 rooms

Strongly above

CO₂ Emissions

3.1 t/year

Street avg 3.5 t/year

Above

Before you decide

Everything you need to know about 21 Blackstone Avenue

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

Larger development activity nearby

Pick your report · every report is £14.99

One time fee only - money back guarantee

The data behind every report

Comparables

Similar properties nearby

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

£329k

1 Bronte Close

SN3 6JL

4 bed1 bath

£340k

1 Austen Crescent

SN3 6JF

4 bed3 bath

£375k

1 Bradwell Moor

SN3 6NH

4 bed2 bath

£408k

1 Ballyack Close, Coate

SN3 6EG

4 bed

£286k

1 Blackstone Avenue

SN3 6DN

3 bed

£288k

1 Christie Close

SN3 6JJ

3 bed1 bath

£279k

1 Abney Moor

SN3 6NN

3 bed

£258k

1 Buttermere

SN3 6LF

3 bed1 bath

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

3/mo

Steady year-on-year across the wider district.

Nearest stop

0.2 km

Thorne Road — bus stop.

Closest school

0.2 km

Eldene Nursery and Primary School. 25 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 SN3 6DN from Defra's strategic mapping. The pin marks this postcode's centroid.

Daytime· 07:00 – 23:00

51.1dB

Low

Night-time road noise heatmap for SN3 6DN

Night-time· 23:00 – 07:00

41.5dB

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 21 Blackstone Avenue, Swindon, SN3 6DN. Each answer is also embedded as structured data for search engines.