What type of property is 20 Cowper Avenue, SM1 3RD?

20 Cowper Avenue, SM1 3RD is a 3-bedroom semi-detached house.

What did 20 Cowper Avenue, SM1 3RD sell for?

20 Cowper Avenue, SM1 3RD last sold for £449,950 in September 2015, around 11 years ago. Source: HM Land Registry.

What energy rating does 20 Cowper Avenue, SM1 3RD have?

The current EPC rating for 20 Cowper Avenue, SM1 3RD is C with a score of 78 out of 100, lodged in May 2025. It has dropped from a B recorded in May 2015. The assessor estimates the property could reach a B. Source: EPC Register.

What is the floor area of 20 Cowper Avenue, SM1 3RD?

20 Cowper Avenue, SM1 3RD has a recorded floor area of 88 m² (947 sq ft), around 29 m² per bedroom. That makes it about 11% larger than the median EPC-recorded property in SM1 3RD. Source: EPC Register.

How is 20 Cowper Avenue, SM1 3RD heated?

The latest EPC at 20 Cowper Avenue, SM1 3RD records mains gas as the main heating fuel. Source: EPC Register.

Where is 20 Cowper Avenue, SM1 3RD located?

20 Cowper Avenue, SM1 3RD sits in Sutton. It falls within the SM1 postcode district.

Is 20 Cowper Avenue, SM1 3RD in a safe area?

Police records around 20 Cowper Avenue, SM1 3RD show an average of 9 reported crimes per month over the last 13 months. Violent crime makes up roughly 50% of reports, the most common category. The overall trend is rising (287% versus the prior period). Source: Police UK.

Which schools serve 20 Cowper Avenue, SM1 3RD?

The closest primary school to 20 Cowper Avenue, SM1 3RD is Manor Park Primary Academy (721m), one of 31 primaries within walking distance. The closest secondary is St Philomena's Catholic High School for Girls (699m), with 13 secondaries in the surrounding area.

How well connected is 20 Cowper Avenue, SM1 3RD?

The closest bus stop to 20 Cowper Avenue, SM1 3RD is Byron Avenue (SM1), 75m away. The nearest rail option is Carshalton Station, 835m away.

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20 Cowper Avenue, Sutton, SM1 3RD

Property type

Semi-detached

Bedrooms

Bathrooms

Floor area

88 m²

947 sq ft

Energy rating

Score 78

Tenure

Private Rental

Overview

About 20 Cowper Avenue

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

20 Cowper Avenue is a three-bedroom semi-detached house in Sutton (SM1 3RD). It has a recorded floor area of 88 m² (around 947 sq ft) and construction records dating it to 2012 onwards. The latest certificate (May 2025) shows a C (score 78), near the top of the C band. Earlier certificates rated it B (May 2015); the latest reading is one band lower. Between certificates, roof efficiency dropped from Very Good to Good and window efficiency dropped from Very Good to Good. The recommended improvements would push it to B (score 90).

Today's modelled estimate of £501,000 is 11.3% above the 2015 sale price. On a £-per-square-foot basis, the last sale (£475/sq ft) was about 85.9% above the typical sold price in the postcode. Last sold in September 2015, so it's been off the market for around 11 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

Bedrooms3
Bathrooms2

Outside

Private gardenYes
ParkingAllocated

Before you decide

Everything you need to know about 20 Cowper Avenue

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

Larger development activity nearby

£14.99one-off

30-day money-back guarantee

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 2)

May 2025

EPC Rating

C78

Main Heating

Gas

Main Fuel

Gas

Hot Water

Good

Windows

Good

CO2 Emissions

1.8 t/year

Occupancy

Rented

Planning

Planning history

Applications and permits filed against 20 Cowper Avenue, Sutton, SM1 3RD, sourced from the PlanIt planning register.

20 Cowper Avenue has no planning applications on record.

Notable planning nearby

3applications of note in the surrounding area

Before you offer

We flagged 1 thing worth checking at 20 Cowper Avenue

Independent checks surfaced things a buyer would want to understand before offering. The report explains each one in full, with the underlying data and what to ask.

Larger development activity nearby

£14.99

30-day money-back guarantee

Price

Sales history & valuation

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

20 Cowper Avenue valuation sits well clear of the typical sold price in this postcode.

Current estimate

£501,000

Modelled from EPC, postcode comparables.

See how we calculated this

Last sold (2015)

£449,950

Recorded with HM Land Registry.

Sales timeline

15 September 2015Most recent
£449,950

Median price across the last 5 sales in SM1 3RD: £460,274 (2024–2020).

Nearby sales in SM1 3RD

On the street

Versus other Cowper Avenue homes

Four headline reads against 25 similar houses on this street, drawn from the latest EPC and Land Registry data.

Floor Area for 20 Cowper Avenue runs comfortably ahead of the street norm.

Price per m²

£5,113

Street avg £3,849

Above

Floor Area

88 m²

Street avg 82 m²

Strongly above

Habitable Rooms

5 rooms

Street avg 4 rooms

Strongly above

CO₂ Emissions

1.8 t/year

Street avg 3.3 t/year

Strongly above

Before you decide

Everything you need to know about 20 Cowper Avenue

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

Larger development activity nearby

£14.99one-off

30-day 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.

£466k

1 Cowper Avenue

SM1 3RD

3 bed

£540k

1 Byron Gardens

SM1 3QG

3 bed1 bath

£565k

1 Berwick Gardens

SM1 3SZ

3 bed2 bath

£426k

1 Connaught Road

SM1 3PJ

3 bed1 bath

£596k

1 Chilworth Gardens

SM1 3SP

3 bed2 bath

£468k

1 Byron Avenue

SM1 3RA

2 bed1 bath

£354k

1 Bryanstone Court, Oakhill Road

SM1 3AF

2 bed1 bath

£738k

1 Colburn Way

SM1 3AU

4 bed2 bath

Area

The neighbourhood at a glance

A condensed read of the local area. Each tile links through to the full breakdown on the Sutton district page.

Full Sutton report

Rail-style transport is unusually close for this postcode.

Crime

9/mo

Rising year-on-year across the wider district.

Nearest stop

0.1 km

Byron Avenue (SM1) — bus stop.

Closest school

0.7 km

St Philomena's Catholic High School for Girls. 44 schools nearby.

Go deeper on the local area

The full 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 SM1 3RD from Defra's strategic mapping. The pin marks this postcode's centroid.

Daytime· 07:00 – 23:00

52.0dB

Low

Night-time road noise heatmap for SM1 3RD

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

FAQ

Common questions

The questions buyers, sellers and homeowners most often ask about 20 Cowper Avenue, Sutton, SM1 3RD. Each answer is also embedded as structured data for search engines.