Energy Performance Certificate
12, Adele Avenue
AL6 0AU
WELWYN
Current
D
66
Potential
C
76
At a Glance
About This Property
This semi-detached maisonette is located in WELWYN, AL6 0AU. The property offers 63m² (678 sq ft) of modest-sized living space with 3 habitable rooms. It is a post-war property from the mid-20th century. With an EPC rating of D (66/100), this property is around the UK average for energy efficiency. With recommended improvements, it could achieve a C rating (76/100). The gas central heating system has good efficiency, indicating a relatively modern, well-maintained boiler. The walls feature cavity wall insulation for improved thermal efficiency. 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 £654, comprising £433 for heating, £124 for hot water, and £97 for lighting. The property produces 2.8 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 12, Adele Avenue Compare?
With an energy efficiency score of 66/100, this WELWYN property is around the national average for UK homes. Annual energy costs of £654 are approximately £1146 below the UK average of £1800, representing significant savings. At 2.8 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 AL6 postcode district.
How This Property Compares
vs UK Average
vs WELWYN
vs AL6
National Ranking: With an EPC score of 66/100, this property is average and performs better than approximately 45% of UK homes for energy efficiency.
Top 55% nationally
Energy Costs: £362/year less than the WELWYN average
Energy Efficiency Rating
📊 Official EPC Register DataCurrent Rating
Potential Rating
With recommended improvements
Based on assessment dated 11 Apr 2019
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Property Information
Full Address
12, Adele Avenue
AL6 0AU
WELWYN
Property Type
Maisonette
Semi-Detached
Construction Age
England and Wales: 1950-1966
Floor Area
63.0 m²
3.0 total rooms
3.0 heated
Tenure
rental (private)
Efficiency Score
66 / 100
Potential: 76
CO₂ Emissions
2.8 tonnes/year
45 kg/m²
Energy Consumption
255 kWh/m²/year
Last Inspected
11 Apr 2019
rental (private)
About WELWYN
WELWYN is situated in Hertfordshire, East of England. Properties in WELWYN have an average EPC rating of D (score 62/100). Heating costs are £583 below the WELWYN average, offering good value. The AL6 postcode district contains over 3600 registered properties. Built during the mid-20th century suburban expansion, this property reflects the housing developments common to the WELWYN area.
Location & Nearby Area
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Annual Energy Costs
Heating
Boiler and radiators, mains gas
£433.0/yr
Save £152/yr
Hot Water
£124.0/yr
Lighting
0.0% low energy
£97.0/yr
Save £48/yr
Building Elements
Walls
Cavity wall, as built, no insulation (assumed)
Roof
Pitched, 100 mm loft insulation
Windows
Some double glazing
Floor
(another dwelling below)
Heating System
Boiler and radiators, mains gas
Main Fuel
mains gas (not community)
Lighting
No low energy lighting
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With 3 selected upgrades
Future Energy Price Simulator
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Your Savings Today
£599/yr
£5,990 over 10 years
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£599/yr
£5,990 over 10 years
Build Your Upgrade Plan
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Cavity Wall Insulation
Your walls are rated Poor. Cavity fill is quick and cost-effective.
Double Glazing
Your windows are rated Poor. Modern A-rated double glazing reduces drafts and heat loss.
Air Source Heat Pump
Ultra-efficient heating with £7,500 government grant. OVO: MCS certified installation.
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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
St John's CofE Primary School
PrimaryLast inspected: Apr 2023
Harwood Hill Junior Mixed Infant and Nursery School
PrimaryLast inspected: Mar 2023
Homerswood Primary and Nursery School
PrimaryLast inspected: Jan 2019
Waterside Academy
PrimaryLast inspected: Jun 2022
The Holy Family Catholic Primary School
PrimaryLast inspected: Jul 2019
Monk's Walk School
SecondaryLast inspected: Sept 2023
Welwyn St Mary's Church of England Voluntary Aided Primary School
PrimaryLast inspected: Sept 2013
Templewood Primary School
PrimaryLast inspected: Oct 2021
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: 321 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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Related Property Guides
Based on this property's characteristics, these guides might help you:
How to Improve Your EPC Rating →
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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.