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PROPERTY ENERGY EFFICIENCY CERTIFICATE DETAILS
Chalfont Avenue, WEMBLEY, HA9 6NW

Introduction

Energy Performance Certificates (EPCs) are designed to tell you how efficient a building is and provides a rating between A (very efficient) and G which is inefficient. It helps to identify how costly it will be to light and heat a property and what the carbon dioxide emissions are likely to be.

An EPC needs to be provided as part of the process of selling or renting a house and should be availale as soon as the property is marketed. An EPC may only be produced by an approved domestic energy assessor and each certificate is valid for 10 years.

Additionally, an EPC will highlight potential efficiency improvements that could be made to the property, an estimated cost for implementation and the likely savings that can be made as a result. These costs and savings are for a typical household in that property and not specific to you or your family.

Certificates issued for Chalfont Avenue, HA9 6NW are shown below and the data are updated monthly for England and Wales and quarterly for properties in Scotland.

Data are provided by the Department for Levelling Up, Housing and Communities.

Energy Performance Certificates Generated for Chalfont Avenue, WEMBLEY, HA9 6NW
Period Covered: 2008 - 31 January 2025

Address
Inspection Date
Current
Potential
Property Type
Built Form
Constructed
Address
11 Chalfont Avenue
Date
22 Aug 2018
Current
Potential
68
86
Property Type
House
Built Form
Semi-Detached
Constructed
1930-1949
+
Certificate History
22 Aug 2018
68
86
Total Floor Area
106 sq m
Current CO2 Emissions Level
3.7
Potential CO2 Emissions Level
1.4
CO2 per sq m per Year
35
Mains Gas Available
Yes
Habitable Rooms
5
Number of Extensions
1
Address
13 Chalfont Avenue
Date
8 May 2017
Current
Potential
44
67
Property Type
House
Built Form
Semi-Detached
Constructed
1930-1949
+
Certificate History
8 May 2017
44
67
8 Aug 2013
64
80
Total Floor Area
115 sq m
Current CO2 Emissions Level
6.9
Potential CO2 Emissions Level
3.9
CO2 per sq m per Year
59
Mains Gas Available
Yes
Habitable Rooms
4
Number of Extensions
1
Address
15 Chalfont Avenue
Date
10 May 2024
Current
Potential
70
85
Property Type
House
Built Form
Semi-Detached
Constructed
1930-1949
+
Certificate History
10 May 2024
70
85
Total Floor Area
105 sq m
Current CO2 Emissions Level
3.4
Potential CO2 Emissions Level
1.6
CO2 per sq m per Year
32
Mains Gas Available
Yes
Habitable Rooms
6
Number of Extensions
1
Address
33 Chalfont Avenue
Date
5 Jul 2023
Current
Potential
71
85
Property Type
House
Built Form
Semi-Detached
Constructed
1930-1949
+
Certificate History
5 Jul 2023
71
85
Total Floor Area
88 sq m
Current CO2 Emissions Level
2.9
Potential CO2 Emissions Level
1.4
CO2 per sq m per Year
32
Mains Gas Available
Yes
Habitable Rooms
5
Number of Extensions
0
Address
35 Chalfont Avenue
Date
6 Jun 2018
Current
Potential
47
83
Property Type
House
Built Form
Semi-Detached
Constructed
1930-1949
+
Certificate History
6 Jun 2018
47
83
11 Jul 2017
56
85
Total Floor Area
87 sq m
Current CO2 Emissions Level
5.8
Potential CO2 Emissions Level
1.6
CO2 per sq m per Year
66
Mains Gas Available
Yes
Habitable Rooms
4
Number of Extensions
0
Address
5 Chalfont Avenue
Date
20 Sep 2016
Current
Potential
61
84
Property Type
House
Built Form
Semi-Detached
Constructed
1930-1949
+
Certificate History
20 Sep 2016
61
84
Total Floor Area
107 sq m
Current CO2 Emissions Level
4.6
Potential CO2 Emissions Level
1.7
CO2 per sq m per Year
43
Mains Gas Available
Yes
Habitable Rooms
5
Number of Extensions
1
Address
7 Chalfont Avenue
Date
7 Apr 2022
Current
Potential
65
80
Property Type
House
Built Form
Semi-Detached
Constructed
1930-1949
+
Certificate History
7 Apr 2022
65
80
Total Floor Area
147 sq m
Current CO2 Emissions Level
5.5
Potential CO2 Emissions Level
3.0
CO2 per sq m per Year
37
Mains Gas Available
Yes
Habitable Rooms
7
Number of Extensions
1
Address
9 Chalfont Avenue
Date
1 May 2023
Current
Potential
62
83
Property Type
House
Built Form
Semi-Detached
Constructed
1900-1929
+
Certificate History
1 May 2023
62
83
Total Floor Area
110 sq m
Current CO2 Emissions Level
4.7
Potential CO2 Emissions Level
2.0
CO2 per sq m per Year
43
Mains Gas Available
Yes
Habitable Rooms
5
Number of Extensions
1
Bands

A
92 - 100
B
81 - 91
C
69 - 80
D
55 -68
E
39 -54
F
54 -38
G
0 - 20

Energy Performance Certificate Notes

There are a number of reasons that certificates are excluded from the dataset;

  • The holder of the energy certificate has 'opted-out' of disclosure
  • The certificate is excluded on the grounds of national security
  • Certificates that are marked as 'cancelled' or 'not for issue'

Certificates are grouped together by the property reference identifier rather than the postal address with a view to showing the history of changes made to properties over time. Sometimes, one property may exist as multiple entries in the table instead and this is as a result of inconsistent building references being used on each prepared certificate.

Contains public sector information licensed under the Open Government Licence v3.0.
Contains Royal Mail data © Royal Mail copyright and Database right 2025.