Home Checkup

Energy Performance Certificate

11b Upper Square

TW7 7BH

ISLEWORTH

Current

D

63

Potential

C

80

At a Glance

About This Property

This detached flat is located in ISLEWORTH, TW7 7BH. The property offers 85m² (915 sq ft) of good-sized living space with 4 habitable rooms. It is a period property with Victorian or earlier origins. With an EPC rating of D (63/100), this property is around the UK average for energy efficiency. With recommended improvements, it could achieve a C rating (80/100). The gas central heating system has good efficiency, indicating a relatively modern, well-maintained boiler. The solid walls lack insulation. Solid wall insulation (external or internal) typically costs £8,000-£14,000 but can reduce heat loss by up to 35% and improve your EPC rating by 1-2 bands. Double glazing is installed, though the efficiency rating suggests older units. Modern low-E double glazing can be up to 40% more efficient than units installed before 2002. Estimated annual energy costs are £1298, comprising £1051 for heating, £172 for hot water, and £75 for lighting. The property produces 3.5 tonnes of CO2 per year, which is low for a UK home. For landlords: This rental property with a D rating is positioned above the current minimum standard. With proposed changes to require a C rating by 2028, modest improvements now could future-proof your compliance.

How Does 11b Upper Square Compare?

With an energy efficiency score of 63/100, this ISLEWORTH property is around the national average for UK homes. Annual energy costs of £1298 are approximately £502 below the UK average of £1800, representing significant savings. At 3.5 tonnes of CO2 per year, emissions are below the UK average of 4.5 tonnes.

Data source: Comparisons based on UK national statistics from the Department for Energy Security and Net Zero.This property is located in the TW7 postcode district.

📊

How This Property Compares

🇬🇧

vs UK Average

This property63
Average60
+5% better
🏘️

vs ISLEWORTH

This property63
Average64
-2% below
📮

vs TW7

This property63
Average62
+2% better

National Ranking: With an EPC score of 63/100, this property is average and performs better than approximately 45% of UK homes for energy efficiency.

Top 55% nationally

Energy Costs: £724/year more than the ISLEWORTH average

Energy Efficiency Rating

📊 Official EPC Register Data
A92-100
B81-91
C69-80
Potential
D55-68
Current
E39-54
F21-38
G1-20

Current Rating

D(63 points)

Potential Rating

C(80 points)

With recommended improvements

Based on assessment dated 25 Jul 2025

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Property Information

📍

Full Address

11b Upper Square

TW7 7BH

ISLEWORTH

🏠

Property Type

Flat

Detached

📅

Construction Age

England and Wales: before 1900

📐

Floor Area

85.0

4.0 total rooms

4.0 heated

🔑

Tenure

Rented (private)

Efficiency Score

63 / 100

Potential: 80

🌍

CO₂ Emissions

3.5 tonnes/year

41 kg/m²

📊

Energy Consumption

226 kWh/m²/year

🔍

Last Inspected

25 Jul 2025

marketed sale

📍

About ISLEWORTH

ISLEWORTH is situated in Middlesex, South East. Properties in ISLEWORTH have an average EPC rating of D (score 64/100). Heating costs are £477 above the local average, suggesting room for improvement. The TW7 postcode district contains over 12400 registered properties. Like many ISLEWORTH properties, this home features period architecture with character typical of Victorian-era construction.

🗺️

Location & Nearby Area

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Annual Energy Costs

🔥

Heating

Boiler and radiators, mains gas

£1051.0/yr

Save £628/yr

🚿

Hot Water

£172.0/yr

💡

Lighting

78.0% low energy

£75.0/yr

Building Elements

🧱

Walls

Solid brick, as built, no insulation (assumed)

Very Poor
🏗️

Roof

Pitched, insulated (assumed)

Average
🪟

Windows

Some double glazing

Very Poor
📦

Floor

(another dwelling below)

🔥

Heating System

Boiler and radiators, mains gas

Good

Main Fuel

mains gas (not community)

💡

Lighting

Below average lighting efficiency

Average
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External Wall Insulation

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Double Glazing

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📊 Compare with UK-Wide Property Data

See how this property compares to national averages. Explore energy efficiency trends, top-rated areas, and comprehensive UK property statistics.

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🏫

Nearby Schools

Within 3 miles of this property

The Blue School CofE Primary

Primary
📍0 miles awayTW7 6RQ

Last inspected: Nov 2022

Good

St Mary's Catholic Primary School, Isleworth

Primary
📍0.1 miles awayTW7 7EE

Last inspected: Jun 2022

Good

Worple Primary School

Primary
📍0.2 miles awayTW7 7DB

Last inspected: Oct 2018

Good

Gumley House RC Convent School, FCJ

Secondary
📍0.2 miles awayTW7 6XF

Last inspected: Oct 2018

Good

Isleworth Town Primary School

Primary
📍0.4 miles awayTW7 6AB

Last inspected: Feb 2023

Good

The Smallberry Green Primary School

Primary
📍0.5 miles awayTW7 5BF

Last inspected: Feb 2023

Good

The Green School for Boys

Secondary
📍0.6 miles awayTW7 6AU

Last inspected: Feb 2020

Good

The Green School for Girls

Secondary
📍0.7 miles awayTW7 5BB
?Not yet rated

About school ratings: Ofsted ratings range from Outstanding to Inadequate. These ratings are based on inspections of teaching quality, leadership, pupil behavior, and safety. Note that school catchment areas vary - check with the school or local council for admission details.

Data source: School information from Get Information About Schools (GIAS). Distances are approximate. Always verify school catchment areas directly with the school or local education authority.

🌐

Broadband & Connectivity

🚀Ultrafast Broadband

Average download speed: 416 Mbps

⚡ Gigabit Available
⬇️

Download Speed

Minimum:30 Mbps
Average:416 Mbps
Maximum:1000 Mbps
⬆️

Upload Speed

Minimum:50 Mbps
Average:167 Mbps
Maximum:200 Mbps

Available Providers

Virgin MediaHyperopticBTSkyTalkTalk

What do these speeds mean? 10-30 Mbps: Good for browsing and streaming. 30-100 Mbps: Great for multiple users and HD streaming. 100-300 Mbps: Excellent for 4K streaming and gaming. 300+ Mbps: Perfect for large households and heavy internet use.

Data source: Broadband speeds are from Ofcom Connected Nations 2025 report (July 2025 release). Data shows typical speeds available in this postcode area. Actual speeds at this specific property may vary depending on line quality, distance from exchange, and chosen provider. Always verify availability with providers before committing.

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Area Safety

Higher Crime291 incidents/month

The surrounding area (1-mile radius) experiences higher crime levels

Most Common Incidents

April 2026
📊

violent crime

93 incidents (32%)

🔊

Anti-social behaviour

54 incidents (19%)

🚗

Vehicle crime

31 incidents (11%)

🔥

Criminal damage

25 incidents (9%)

👜

Theft

19 incidents (7%)

About this data: Crime statistics show incidents reported during April 2026 within a 1-mile radius. Data from Police.uk, updated monthly.

More Properties in TW7 7BH

Showing properties in the same postcode. Click to view detailed EPC data for each property.

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About this EPC: Energy Performance Certificates are valid for 10 years and are required when a property is built, sold, or rented. Learn more about EPCs or book an EPC assessment.

Cost estimates are approximate and actual savings may vary. Find local tradesmen to get accurate quotes for improvements.

Data Sources: This report contains public sector information licensed under the Open Government Licence v3.0.

Data from: UK Energy Performance Certificate Register, HM Land Registry Price Paid Data, and Police.uk crime statistics.

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