Energy Performance Certificate
Flat 59 Marlborough, 61, Walton Street
SW3 2JX
LONDON
Current
D
61
Potential
D
65
At a Glance
About This Property
This flat is located in LONDON, SW3 2JX. The property offers 47m² (506 sq ft) of compact living space with 3 habitable rooms. It is a period property with Victorian or earlier origins. With an EPC rating of D (61/100), this property is around the UK average for energy efficiency. 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. The flat roof has poor insulation. Flat roof insulation is more complex but essential for preventing heat loss and condensation issues, typically costing £1,000-£3,000 depending on access and method. 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 £582, comprising £457 for heating, £72 for hot water, and £53 for lighting. The property produces 2.7 tonnes of CO2 per year, which is low for a UK home.
How Does Flat 59 Marlborough Compare?
With an energy efficiency score of 61/100, this LONDON property is around the national average for UK homes. Annual energy costs of £582 are approximately £1218 below the UK average of £1800, representing significant savings. With 47m² of space, this is a more compact property compared to the UK average of 87m². At 2.7 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 SW3 postcode district.
How This Property Compares
vs UK Average
vs LONDON
vs SW3
National Ranking: With an EPC score of 61/100, this property is average and performs better than approximately 45% of UK homes for energy efficiency.
Top 55% nationally
Energy Costs: £38/year more than the LONDON average
Energy Efficiency Rating
📊 Official EPC Register DataCurrent Rating
Potential Rating
Based on assessment dated 12 May 2011
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Property Information
Full Address
Flat 59 Marlborough
61, Walton Street
SW3 2JX
LONDON
Property Type
Flat
NO DATA!
Construction Age
England and Wales: before 1900
Floor Area
47.0 m²
3.0 total rooms
3.0 heated
Tenure
owner-occupied
Efficiency Score
61 / 100
Potential: 65
CO₂ Emissions
2.7 tonnes/year
57 kg/m²
Energy Consumption
298 kWh/m²/year
Last Inspected
12 May 2011
marketed sale
About LONDON
LONDON is situated in South West London, London. Properties in LONDON have an average EPC rating of D (score 64/100). The SW3 postcode district contains over 13800 registered properties. Like many LONDON 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
£457.0/yr
Save £28/yr
Hot Water
£72.0/yr
Save £8/yr
Lighting
0.0% low energy
£53.0/yr
Save £26/yr
Building Elements
Walls
Solid brick, as built, no insulation (assumed)
Roof
Flat, no insulation (assumed)
Windows
Partial double glazing
Floor
(other premises below)
Heating System
Boiler and radiators, mains gas
Main Fuel
mains gas (not community)
Lighting
No low energy lighting
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Loft Insulation
Your roof is rated Very Poor. Top up to 270mm for best results.
External Wall Insulation
Your walls are rated Very Poor. External insulation can dramatically reduce heat loss.
Double Glazing
Your windows are rated Poor. Modern A-rated double glazing reduces drafts and heat loss.
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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.
View UK Property Insights →Nearby Schools
Within 3 miles of this property
Marlborough Primary School
PrimaryLast inspected: Feb 2019
Saint Thomas More Language College
SecondaryLast inspected: May 2022
St Joseph's Catholic Primary School
PrimaryOratory Roman Catholic Primary School
PrimaryLast inspected: Sept 2023
Holy Trinity CofE Primary School
PrimaryLast inspected: Apr 2023
Our Lady of Victories RC Primary School
PrimaryLast inspected: Sept 2011
Christ Church CofE Primary School
PrimaryLast inspected: Jun 2013
St Barnabas' CofE Primary School
PrimaryLast inspected: Mar 2023
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
Average download speed: 500 Mbps
Download Speed
Upload Speed
Available Providers
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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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.